Dr. Costas G. PAPADOPOULOS Curiculum Vitae

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1 Dr. Costas G. PAPADOPOULOS Curiculum Vitae Positions Current: September today NCSR Democritos, Senior Researcher (level B). Previous: May, August - September 2003 Visiting Professor, Durham University August November 2003 CERN Scientific Associate and Marie Curie Fellow, cat 40. June September 2001 CERN corresponding Fellow. June September 1998 CERN corresponding Fellow. May August 1999 NCSR Democritos, Researcher (level C). May May 1996 Research Associate, Physics Department, Durham University, United Kingdom and unpaid Associate, Theory Division, CERN. March 1992-April 1994 Fellow at CERN Theory Division, Geneva Post-doctoral position in NCSR Democritos, Athens Teaching assistant in University of Athens ÁÛÒ ÓÈÖ ØÙÔÓËÕÓÐ È Ö ôº B.A. ÈØÙÕÓµof Education Physics, University of Athens Post-graduate courses in DEA de Physique Theorique, Ecole Normale, Paris Post-graduate courses in NCSR Demokritos, Athens PhD in Theoretical Physics, University of Athens. Research Experience and Expertise I am the author of 90 publications, in International refereed Journals and conference proceedings, including CERN Yellow Reports, with more than 2300 citations (data from SLAC-SPIRES HEP). My research work covers a large area of theoretical high-energy physics with emphasis to particle physics phenomenology. I have participated in a number of international working groups (see also my publication list) set up either to study the physics potential or to assist, from the theoretical part, the physics analysis of large scale experiments: LEP200, LHC and ILC (the International Linear Collider project). I have developed the underlying theoretical and methodological approaches as well as the computer programmes for a number of computational tools, including ERATO, ERATO-LQ, HAAG, and notably the HELAC-PHEGAS system. These novel methods and tools allow the detailed study of arbitrary scattering process and played, play and will play a crucial role in the physics analysis of large scale experiments like LEP, LHC and ILC. I am coordinating one of the largest collaboration on theoretical particle physics in Europe, the HEPTOOLS Network, that includes 17 research teams, from 16 Research centers and 47 Universities worldwide. Research Programs I participate (or participated) in the following programs: 1. Marie Curie Research Training Network, Tools and Precision Calculations for Physics Discoveries at Colliders, HEPTOOLS, acting as Network Coordinator,

2 2. Marie Curie Host Fellowships for Transfer of Knowledge (TOK), Algorithms and Tools for multi-particle production and higher order corrections at high energy colliders, ALGOTOOLS, scientist in charge, General Secretariat for Research and Technology, Poland-Greece bilateral, Advanced computer techniques for theoretical calculations and development of simulation programs for high energy physics experiments, scientist in charge, EPAN, Participation of Greek teams in International Organizations, Greece-CERN, NCSR-Demokritos, participant, General Secretariat for Research and Technology, programme: Research Excellence, Physics at the LHC, participant, Development Host Fellowships, Multi-Particle Processes And Higher Order Corrections, scientist in charge, General Secretariat for Research and Technology, PLATON: Franco-hellenic bilateral collaboration project, participant, Research Training Network, Particle physics phenomenology at high energy colliders, coordinator of the Greek node, Marie Curie Individual Fellowship, Multi-Particle Processes At High Energy Colliders, fellow, NCSR Democritos program Demo-research, scientist in charge, PENED-GGET, E345, participant, EEC Program, Human Capital and Mobility, participant, CHRXCT EEC Program, Science, participant, SC1-CT EEC Program, Science, participant, SC1-CT British Council, Athens-Durham, participant, Bilateral Program between Greece (NRCPS D ) and Germany (DESY), participant. Schools-Conferences-Workshops 1986 Paris-Meudon Colloquium on Superstrings, Paris st Congress of the Greek Society for the Study of High Energy Physics (GSSHEP), Athens ICTP Spring School on Superstrings, Trieste, Italy nd Congress of GSSHEP, Athens Les Houches School on Strings, Fields and Critical Phenomena, Les Houches, France rd Congress of GSSHEP, Athens rd Hellenic School on Elementary Particles, Corfou, Greece th Congress of GSSHEP, Athens International School on Elementary Particle Physics, Ioannina, Greece ECFA Large Hadron Collider Workshop, Aachen, Germany th Congress of GSSHEP, Thessaloniki, Greece th Congress of GSSHEP, Athens, Greece th Congress of GSSHEP, Iraklion, Greece. 2

3 1993 Workshop on future electron-positron colliders, Annecy, France Recontres de Moriond, Electroweak interactions and Unified theories, Les Arcs, France th Congress of GSSHEP, Athens, Greece LEP II Workshop, 1st meeting of Standard Model Group LEP II Workshop, 1st meeting of WWG couplings Group LEP II Workshop, 2nd meeting of WW Group LEP II Workshop, 2nd meeting of WWG couplings Group LEP II Workshop, 3d meeting of WW Group Next Linear Collider Workshop, April 4, CERN LEP II Workshop, 3d meeting of WWG couplings Group LEP II Workshop, 4th meeting of WW Group th Congress of GSSHEP, Ioannina, Greece Linear Collider Workshop, February, Hamburg, Germany Linear Collider Workshop, November, Hamburg, Germany Physics at LEP2, Oxford University, United Kingdom Joint Particle Phenomenology meeting, Chalkidiki, Greece XVIII int. symposium on lepton-photon interactions, Hamburg, Germany nd meeting on high-energy phenomenology (EEC network), September, Nijmegen, The Netherlands th GSSHEP Conference, Athens LHC Workshop, CERN, Geneva, Switzerland Meeting of the DELPHI Working group on TGC measurements, Athens, Greece LHC Workshop, CERN, Geneva, Switzerland MiniLEP2 Workshop, CERN, Geneva, Switzerland WW99 International Workshop on WW physics at LEPII, Creta, Greece Padua Conference on the Linear Collider project Investing in Europe s Human Research Potential, October 4-7 Crete, Heraklion European Young Scientist Forum in the Pan-European Conference on Science and technology - Prospects for the 21st century, Gdansk, Poland, October VII International Workshop on Advanced Computing and Analysis Techniques in Physics Research, Fermilab, USA, October Physics at Colliders network meeting, Granada, Spain, March CPP2001, Automatic Calculation for Future Colliders, November 28-30, 2001, Tokyo Metropolitan University, Japan Physics at Colliders network meeting, April 9-11, 2002, Grey College, United Kingdom The 4th ECFA/DESY Workshop on Physics and Detectors for a GeV Linear e+e Collider, 1-4 April at NIKHEF 2003 CERN Workshop on Monte Carlo tools for the LHC July 7 -Aug Electroweak Radiative Corrections to Hadronic Observables at TeV Energies 11th-15th September 2003 Grey College, University of Durham ECFA LC Workshop Montpellier, France, November Annual meeting of the HSSHEP, Chios, 1-4 April Particle physics phenomenology at high energy colliders, final meeting of the European Union Network, Montpellier, France, September th International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT 05), Zeuthen, Germany, May XXIX International Conference of Theoretical Physics Ustron, 8-14 September 2005, Poland 3

4 2005 QMUL Workshop From Twistors to Amplitudes 3-5 November, Queen Mary, University of London 2006 HEP2006: Recent Developments in High Energy Physics and Cosmology, April 13-16, 2006, Ioannina, Greece 2006 DIS2006, XIV International Workshop on Deep Inelastic Scattering, 20/4/ /4/2006, International Congress Center EPOCHAL Tsukuba, Japan. (invited talk) 2006 Loops and Legs in Quantum Field Theory April 23-28, 2006 Eisenach, Germany 2006 MONTE CARLOS FOR THE LHC, Workshop on the tools for LHC event simulation, CERN, July 17-26, HP 2 Workshop, 6-9 September, 2006, High Precision for Hard Processes at the LHC, ETH, Zurich, Switzerland International Linear Collider (ILC) Workshop (ILC-ECFA and GDE Joint Meeting) Valencia, 6-10 November (invited talk) where means contribution by relevant work presentation. Conference Organization 1994 Organizer of the 1st annual meeting on high energy phenomenology, 9-10 June, National Technical University of Athens, Athens Convenor of the Trilinear Gauge Couplings Group of the Phenomenology Workshop on LEP2 Physics, April, Physics Department, Oxford, UK Organizer of the 2nd annual meeting on high energy phenomenology, September, University of Nijmegen, The Netherlands Organizer of the annual meeting of HSSHEP 1-4 April, University of Aegean, Greece Meeting Of The European Network Physics At Colliders, Sep 2004, Montpellier, France, Editor Loops and Legs 2006, April 23-28, 2006 Eisenach, Germany: Member of the International Programme Committee. Invited talks and visits 1. University of Athens, Greece, NRCPS Democritos, Athens, Greece, CERN, Geneva, Switzerland, 1990, 1992, 1993, 1995, , Ecole Polytechnique, Palaiseau, France, Ecole Normale Superieure, Paris, France, LAPP, Annecy, France, 1989, University of Crete, Iraklion, Greece, 1990, University of Thessaloniki, Greece, 1993, DESY, Hamburg, Germany, 1989, University of Ioannina, Greece, 1993, National Technical University of Athens, Greece, University of Durham, United Kingdom, , University of Minnesota, Minneapolis, MI, USA, New York University, New York, NY, USA, City College of New York, New York, NY, USA, Northeastern University, Boston, Mass, USA, DRAL, Didcot, United Kingdom, Catholic University of Nijmegen, The Netherlands, Argonne National Laboratory, IL, USA,

5 20. University of Torino, Italy, Desy-Zeuthen, Berlin, Germany, Max-Plank Institute, Munich, Germany, ETH, Zurich, Switzerland, NIKHEF, Amsterdam, Netherlands, 2005,2006. Teaching Experience I have participated in laboratory exercises and teaching in University of Athens, as teaching assistant I have organized a post-graduate tutorial on high-energy phenomenology at NCSR Democritos, and I have supervised the PhD work of Dr. O. Korakianitis ( PhD thesis: Phenomenology of and beyond the Standard Model of particle interactions at high energies, February 1993, University of London) as well as the first stages of the work of Dr. K. Philippides ( PhD from New York University, 1995, NY, USA) I have participated in the Annual Summer School organized by NCSR Democritos, giving two lectures on Recent developments in Elementary Particle Physics I have organized and taught the one-semester course on Computational techniques in high-energy phenomenology. This course has been offered for the first time in Greece. It is now part of the graduate school programme of the Department of Applied Mathematics and Physical Sciences, National Technical Universtity of Athens Teaching Introduction to Physical Sciences, at the Hellenic Open University Teaching Qunatum Physics, at the Hellenic Open University. The course is composed by three units: Quantum Mechanics, Nuclear Physics and Elementary Particle Physics. PhD/MSc I have supervised or participated in the supervision of the following PhD Students: O. Korakianitis, February 1993, University of London, PhD, Phenomenology of and beyond the Standard Model of particle interactions at high energies, advisor: Prof. A. Love. K. Phillipides, May 1996, New York University, PhD, Quantum Loop Contributions to form factors and universal corrections of the Standard Model, advisor: Prof. A. Sirlin. Y. Contogiannis, 2001, University of Athens, PhD, Theory of critical fluctuations in the quark matter, advisor: Prof. N. Antoniou. P. Draggiotis, November 2002, Katholieke Universiteit Nijmegen (KUN), The Netherlands, PhD, QCD Explosion: enumeration and computation of QCD processes, advisors: R. Kleiss and C.G.Papadopoulos (co-promotor). A. Kanaki, June 2003, National Technical University of Athens, PhD, The effective action approach to Higher order corrections, advisor: C.G.Papadopoulos. D. Noucios, , National Technical University of Athens, uncompleted, NLO QCD corrections for arbitrary partonic scattering processes, unfinished, advisor: C.G.Papadopoulos. E. Petrakou, March 2006, National Technical University of Athens, Master Thesis, Study of the MSSM and the Susy QED, advisor: C.G.Papadopoulos. A. Lazopoulos, Katholieke Universiteit Nijmegen (KUN), The Netherlands, PhD student, Thesis in preparation, advisors: R. Kleiss and C.G.Papadopoulos (co-promotor). 5

6 Post-Doc A. Vlachos, National Technical University of Athens, PhD student, advisor: C.G.Papadopoulos. I have been participating also in the examination committee of Dr. Andreas van Hameren, at the University of Nijmegen. I have supervised/i am supervising the post-doctoral training of: A.van Hameren, January March M. Worek, December November P. Draggiotis, November November G. Ossola, April today. A. Cafarella, October today. Development of educational material I have developed the educational material entitled Quantum Mechanics, consisting of 16 hours of webcast ( ). Administrative experience I have been participated as: 1. Member elected of the Advisory Board of the Institute of Nuclear Physics, Appointed by the Ministry of Development, as member of the CERN Greek Committee, 2005-today. 3. Deputy member of the Research Management Committee of NCSR- Demokritos ( Ô ØÖÓÔ Ö ÙÒôÒ), 2005-today. 4. Appointed by the Secretary General of Research and Technology, as expert, in the Greek delegate to the 7th Framework Programme (FP7) of the European Commission, People (ex. Marie-Curie Actions), 2006-today. Scientific Organizations I am member of the following Societies: 1. Greek Physical Society. 2. Hellenic Society for the Study of High Energy Physics (HSSHEP), elected member of the board, Greek Union of Researchers (EEE), elected member of the board, , and president of the board, Marie Curie Fellowship Association. Languages Beyond Greek, I have a good knowledge of French and English. Personal Data I am married with Alice Michou and we have two children Alkiviadis and Melissa. 6

7 Publication List International Journals. 1. Jets with small missing energy at CERN and Fermilab in Supersymmerty, E.N. Argyres, C.G. Papadopoulos and S.D.P. Vlassopulos, Physics Letters B180 (1986), Bounds on the top quark mass in N=1 Supergravity Models, C. Chiou-Lahanas, B.C. Georgalas and C.G. Papadopoulos, Physics Letters B193 (1987), Jet signatures of scalar diquarks from superstrings at CERN and Fermilab, E.N. Argyres, C.G. Papadopoulos and S.D.P. Vlassopulos, Physics Letters B202 (1988), Quantization of Roberston-Walker geometry coupled to spin 3 2 field, T. Christodoulakis and C.G. Papadopoulos, Physical Review D38 (1989), Unusual phenomena in the rapidity distribution and the phase transition of the quark-gluon plasma, N.G. Antoniou, E.N. Argyres, P.S. Dimitriadis, C.G. Papadopoulos, L.B. Papatsimba and S.D.P. Vlassopulos, Physical Review D39 (1989), Jet cross sections probing possible quark substructure at hadron colliders, E.N. Argyres, C.G. Papadopoulos, S.D.P. Vlassopulos, Nuclear Physics B324 (1989), Local supersymmetry and superconformal algebra in two dimensions and strings in background fields, G.A. Diamandis, B.C. Georgalas, A.B. Lahanas and C.G. Papadopoulos, Physics Letters B227 (1989), Quantum dynamical aspects of two-dimensional spaces of constant negative curvature, E.N. Argyres, C.G. Papadopoulos, E. Papantonopoulos and K. Tamvakis, Journal of Physics A22 (1989), C-number anomalies on a curved world-sheet, E.N. Argyres and C.G. Papadopoulos, Physics Letters B248 (1990), The Gross-Neveu model near the critical temperature, a mechanism for quark-hadron phase transition in relativistic ion collisions, N.G. Antoniou, A.I. Karanikas and C.G. Papadopoulos, Physics Letters B233 (1989), A note on the connection between SL(2, R) current algebra and general covariance, E.N. Argyres, E.G. Floratos and C.G. Papadopoulos, Physics Letters B234 (1990), Four jet cross sections in e + e annihilation at LEP and SLC energies, E.N. Argyres, C.G. Papadopoulos and S.D.P. Vlassopulos, Physics Letters B237 (1990),

8 13. Jet signatures of scalar diquarks from superstrings at e + e colliders, E.N. Argyres, D. Atwood, A.P. Contogouris, C.G. Papadopoulos and S.D.P. Vlassopulos, Physics Letters B237 (1990), Intermittency, Kadanof scaling and Hadronization, N.G. Antoniou, E.N. Argyres, A.P. Contogouris, C.G. Papadopoulos and S.D.P. Vlassopulos, Physics Letters B245 (1990), Accompanied dileptons as a probe of an effective quark-lepton contact interaction at e + e colliders, E.N. Argyres, O. Korakianitis, C.G. Papadopoulos and S.D.P. Vlassopulos, Nuclear Physics B354 (1991), Testing 3-boson couplings in the Standard Model via single W production at LEP, E.N. Argyres and C.G. Papadopoulos, Physics Letters B263 (1991), Intermittency effects in a two-component model, N.G. Antoniou, E.N. Argyres, C.G. Papadopoulos and S.D.P. Vlassopulos, Physics Letters B260 (1991), Intermittency in high energy collisions and a phase transition in the Feynman-Wilson fluid, N.G. Antoniou, A.P. Contogouris, C.G. Papadopoulos and S.D.P. Vlassopulos, Physical Review D45 (1992), W + W γ production as a test of three boson couplings at LEPII, E.N. Argyres, O. Korakianitis, C.G. Papadopoulos and W.J. Stirling, Physics Letters B259 (1991), The phenomenology of the fractal pomeron, N.G. Antoniou, F. Diakonos and C.G. Papadopoulos, Physics Letters B265 (1991), W + W γ production as a test of the Standard Model at LHC and SSC, E.N. Argyres, F. Diakonos, O. Korakianitis, C.G. Papadopoulos and W.J. Stirling, Physics Letters B272 (1991), Wγγ production as a test of three- and four-gauge-boson couplings at LHC and SSC, E.N. Argyres, G. Katsilieris, O. Korakianitis, C.G. Papadopoulos, C. Philippides and W.J. Stirling, Physics Letters B280 (1992), Testing contact interactions of quarks and gluons at future pp colliders, E.N. Argyres, G. Katsilieris, C.G. Papadopoulos and S.D.P. Vlassopulos, International Journal of Modern Physics A7(1992) One-loop corrections to three vector boson vertices in the Standard Model, E.N. Argyres, G. Katsilieris, A.B. Lahanas, C.G. Papadopoulos and V.C. Spanos, Nuclear Physics B391(1993) Amplitude estimates for multi-higgs production at high energies, E.N. Argyres, R.H.P. Kleiss and C.G. Papadopoulos, Nuclear Physics B391(1993) Cross-section estimates for multi-higgs production at high energies, E.N. Argyres, R.H.P. Kleiss and C.G. Papadopoulos, Nuclear Physics B391(1993) Perturbative unitarity constraints on scalar self-interactions, E.N. Argyres, R.H.P. Kleiss and C.G. Papadopoulos, Physics Letters B296 (1992),

9 28. Hadronic intermittency and chaotic motion in rapidity space, N.G. Antoniou, F.K. Diakonos, C.G. Papadopoulos and P.Schmelcher, Physical Review E48 (1993) Multiscalar production amplitudes beyond threshold, E.N. Argyres, R.H.P. Kleiss and C.G. Papadopoulos, Nuclear Physics B395(1993) On amplitude zeros at threshold, E.N. Argyres, R.H.P. Kleiss and C.G. Papadopoulos, Physics Letters B302(1993) W + γ+jet production as a test of the electromagnetic couplings of W at LHC and SSC, F.K. Diakonos, O. Korakianitis, C.G. Papadopoulos, C. Philippides and W.J. Stirling, Physics Letters B303(1993) Multiscalar amplitudes to all orders in perturbation theory, E.N. Argyres, R.H.P. Kleiss and C.G. Papadopoulos, Physics Letters B308(1993) Nullification of multi-higgs threshold amplitudes in the Standard Model, E.N. Argyres, R.H.P. Kleiss and C.G. Papadopoulos, Physics Letters B308(1993) Partial wave amplitudes and multiparticle production, Costas G. Papadopoulos, Physics Letters B324(1994) Criticality, fractality and intermittency in strong interactions, N.G. Antoniou, F.K. Diakonos, I.S. Mistakidis and C.G. Papadopoulos, Physical Review D49 (1994) Single-W versus W-pair production at LEP II, Costas G. Papadopoulos Physics Letters B333 (1994) On the determination of the trilinear boson couplings in e + e l ν l q q at LEP II, Costas G. Papadopoulos DTP/95/20 and CERN-TH/95-46, [hep-ph/ ], Physics Letters B352 (1995) Stable calculation for unstable particles: restoring gauge invariance E.N. Argyres, W.Beenakker, G.J.van Oldenborgh, A.Denner, S.Dittmaier, J.Hoogland, R. Kleiss, C.G. Papadopoulos and Giampiero Passarino. Physics Letters B358 (1995) Trilinear Gauge Boson Couplings in the MSSM, E.N. Argyres, A.B.Lahanas, C.G. Papadopoulos and V.C.Spanos Physics Letters B383(1996) Studying Trilineat Gauge Couplings at LEP200 using Optimal Observables, C.G. Papadopoulos, Physics Letters B386(1996) ERATO: Event Generator for Four Fermion Poduction at LEP2 Energies and Beyond, C.G. Papadopoulos, Computer Physics Communications 101(1997)

10 42. Nullification in Scalar Theories with Derivative Couplings, E. N. Argyres, C. G. Papadopoulos, M. Bruinsma, R. Kleiss, Physics Letters B392(1997) The Fermion Loop Scheme for Finite Width Effects in e + e Annihilation Into Four Fermions, Wim Beenakker, Geert Jan van Oldenborgh (Leiden U.), Ansgar Denner (PSI, Villigen), Stefan Dittmaier (Bielefeld U.), Jiri Hoogland (NIKHEF, Amsterdam), Ronald Kleiss (Nijmegen U.), Costas G. Papadopoulos (Democritos Nuclear Research Center), Giampiero Passarino (Turin U. & INFN, Turin). NIKHEF , Dec pp, e-print Archive: hep-ph/ , Nuclear Physics B500 (1997) Studying Trilinear Gauge Couplings at Linear Collider Energies, G.J. Gounaris (Thessaloniki U.) and Costas G. Papadopoulos (Democritos Nuclear Research Center). DEMO-HEP-96-04, Dec pp, e-print Archive: hep-ph/ The European Physical Journal C 2 (1998) Physics with e + e Linear Colliders, ECFA/DESY Linear Collider Physics Working Group (E. Accomando et al.). DESY , May pp. e-print Archive: hep-ph/ , Physics Reports 299 (1998) Report of the working group on the measurement of triple gauge boson couplings. By F. Berends, T. Bowcock, D. Charlton, P. Clarke, J. Conboy, C. Hartmann, P. Kyberd, C.G. Papadopoulos, H.T. Phillips, R. Sekulin, A. Skillman. Apr pp. Journal of Physics G24(1998) On the determination of M W and TGCs in W-pair production using the best measured kinematical variables. By F.A. Berends, C.G. Papadopoulos, R. Pittau. CERN-TH , Sep pp. Physics Letters B417 (1998) On the computation of multigluon amplitudes. By Petros Draggiotis, Ronald H.P. Kleiss and Costas G. Papadopoulos CERN-TH , Jun hep-ph/ Physics Letters B439 (1998) WEXTER and ERAFITTER: two programs to fit M W at LEP2 using the best measurable kinematical variables. By F.A. Berends, C.G. Papadopoulos and R. Pittau. CERN-TH , Jul 1998, hep-ph/ Comput.Phys.Commun.115(1998) Fractals at T = T c due to instanton-like configurations. By N.G. Antoniou, Y.F. Contoyiannis, F.K. Diakonos and C.G. Papadopoulos hep-ph/ Physical Review Letters 81 (1998) Single leptoquark production at high-energy e + e colliders By C.G. Papadopoulos Comput. Phys. Commun.118 (1999) 81, hep-ph/ Quantum field theory for discrepancies. II: 1/N corrections using fermions By A. van Hameren, R. Kleiss and C. G. Papadopoulos Nucl. Phys. B558 (1999) 604, hep-ph/ HELAC: A package to compute electroweak helicity amplitudes By A. Kanaki and C. G. Papadopoulos, Comput.Phys.Commun.132 (2000) , hep-ph/

11 54. NEXTCALIBUR: A four-fermion generator for electron positron collisions, By F. A. Berends, C. G. Papadopoulos and R. Pittau, Comput. Phys. Commun. 136 (2001) 148 [hep-ph/ ]. 55. PHEGAS: A phase space generator for automatic cross-section computation, C. G. Papadopoulos, Comput.Phys.Commun.137 (2001) , hep-ph/ Zero-dimensional field theory, E. N. Argyres, A. F. van Hameren, R. H. Kleiss and C. G. Papadopoulos, Eur. Phys. J. C 19 (2001) 567 [hep-ph/ ]. 57. Recursive actions for scalar theories C. Dams, R. Kleiss, P. Draggiotis, E. N. Argyres, A. van Hameren and C. G. Papadopoulos, Eur. Phys. J. C 28 (2003) 561 arxiv:hep-ph/ Multi-jet production in hadron collisions P. D. Draggiotis, R. H. Kleiss and C. G. Papadopoulos, Eur. Phys. J. C 24 (2002) 447, arxiv:hep-ph/ A hierarchical phase space generator for QCD antenna structures, A. van Hameren and C. G. Papadopoulos, Published in Eur.Phys.J. C 25: ,2002 arxiv:hep-ph/ Physics potential and experimental challenges of the LHC luminosity upgrade F. Gianotti et al., Eur. Phys. J. C 39 (2005) 293 [arxiv:hep-ph/ ]. 61. Towards an effective-lagrangian approach to fermion-loop corrections W. Beenakker, A. P. Chapovsky, A. Kanaki, C. G. Papadopoulos and R. Pittau, Nucl. Phys. B 667 (2003) 359 arxiv:hep-ph/ Cross sections for multi-particle final states at a linear collider T. Gleisberg, F. Krauss, C. G. Papadopoulos, A. Schaelicke and S. Schumann, Eur. Phys. J. C 34 (2004) 173 [arxiv:hep-ph/ ]. 63. Challenges in calculations for multi-particle processes A. van Hameren and C. G. Papadopoulos, Acta Phys. Polon. B 35 (2004) 2601 [arxiv:hep-ph/ ]. 64. Multi-particle processes in the standard model without Feynman diagrams, C. G. Papadopoulos and M. Worek, Acta Phys. Polon. B 36 (2005) 3355, arxiv:hep-ph/ Diagrammatic proof of the BCFW recursion relation for gluon amplitudes in QCD, P. D. Draggiotis, R. H. P. Kleiss, A. Lazopoulos and C. G. Papadopoulos, arxiv:hep-ph/ , Eur. Phys. J. C 46, (2006) Multi-parton cross sections at hadron colliders, C. G. Papadopoulos and M. Worek, arxiv:hep-ph/ Reducing full one-loop amplitudes to scalar integrals at the integrand level, Giovanni Ossola, Costas G. Papadopoulos, Roberto Pittau, accepted for publication in Nuclear Physics B, arxiv:hep-ph/

12 Reports & Conference Proceedings 1. J. Alwall, A. Ballestrero, P. Bartalini, S. Belov, E. Boos, A. Buckley, J.M. Butterworth, L. Dudko, S. Frixione, L. Garren, S. Gieseke, A. Gusev, I. Hinchliffe, J. Huston, B. Kersevan, F. Krauss, N. Lavesson, L. Lo nnblad, E. Maina, F. Maltoni, M.L. Mangano, F. Moortgat, S. Mrenna, C.G. Papadopoulos, R. Pittau, P. Richardson, M.H. Seymour, A. Sherstnev, T. Sjo strand, P. Skands, S.R. Slabospitsky, Z. Was, B.R. Webber, M. Worek, D. Zeppenfeld A standard format for Les Houches event files, arxiv:hep-ph/ Written within the framework of the MC4LHC-06 workshop: Monte Carlos for the LHC: A Workshop on the Tools for LHC Event Simulation (MC4LHC), Geneva, Switzerland, Jul P. Draggiotis, A. van Hameren, R. Kleiss, A. Lazopoulos, C. G. Papadopoulos and M. Worek, Recursive equations for arbitrary scattering processes, Nucl. Phys. Proc. Suppl. 160 (2006) 255 [arxiv:hep-ph/ ]. Presented at 8th DESY Workshop on Elementary Particle Theory: Loops and Legs in Quantum Field Theory, Eisenach, Germany, Apr C. G. Papadopoulos and M. Worek, HELAC: A Monte Carlo generator for multi-jet processes, arxiv:hep-ph/ Presented at 14th International Workshop on Deep Inelastic Scattering (DIS 2006), Tsukuba, Japan, Apr C. G. Papadopoulos and M. Worek, Multi-particle processes in QCD without Feynman diagrams, Nucl. Instrum. Meth. A 559 (2006) 278 [arxiv:hep-ph/ ]. 5. W. Hollik et al., Acta Phys. Polon. B 35 (2004) 2533 [arxiv:hep-ph/ ]. 6. F. del Aguila(ed), R. Pittau(ed), A. Djouadi(ed) and C. G. Papadopoulos(ed), Particle physics phenomenology at high energy colliders. Proceedings, Final meeting of the European Union Network, Montpellier, France, September 26-27, 2004, Prepared for Meeting of the European Network Physics at Colliders, Montpellier, France, Sep K. Ackermann et al., Extended joint ECFA/DESY study on physics and detector for a linear e+ e- collider. Proceedings, Summer Colloquium, Amsterdam, Netherlands, April 4, 2003, DESY- PROC Prepared for 4th ECFA / DESY Workshop on Physics and Detectors for a 90-GeV to 800-GeV Linear e+ e- Collider, Amsterdam, The Netherlands, 1-4 Apr Studying trilinear gauge couplings in e+ e- l- anti-nu/l q anti-q at linear collider energies G. J. Gounaris and C. G. Papadopoulos Prepared for Joint ECFA / DESY Study: Physics and Detectors for a Linear Collider (Preceded 1st Workshop at Frascati 5-6 Feb 1996 and 2nd workshop in July whose location and dates are to be determined), Hamburg, Germany, Nov J. A. Aguilar-Saavedra et al. [ECFA/DESY LC Physics Working Group], TESLA Technical Design Report Part III: Physics at an e+e- Linear Collider, arxiv:hep-ph/ P. D. Draggiotis, R. H. P. Kleiss and C. G. Papadopoulos, Multiparton processes in QCD, Prepared for International Europhysics Conference on High-Energy Physics (EPS-HEP 99), Tampere, Finland, Jul N. G. Antoniou, Y. F. Contoyiannis, F. K. Diakonos, G. Georgopoulos, A. Petridis, M. Vassiliou and C. G. Papadopoulos, Probing the QCD critical point in nuclear collisions, Prepared for 29th International Symposium on Multiparticle Dynamics (ISMD 99), Providence, Rhode Island, 8-13 Aug HELAC-PHEGAS: Automatic computation of helicity amplitudes and cross sections A. Kanaki and C. G. Papadopoulos KEK Proceedings , pp.20-25, August Invited talk at second CPP Symposium Computational Particle Physics, Nov

13 13. HELAC-PHEGAS: Automatic computation of helicity amplitudes and cross sections A. Kanaki and C. G. Papadopoulos arxiv:hep-ph/ Invited talk at 7th International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT 2000), Batavia, Illinois, Oct M. W. Grunewald et al., Four-fermion production in electron positron collisions, arxiv:hepph/ C. G. Papadopoulos, Single W production at NLC, Prepared for Workshop on e+ e- Collisions, Hamburg, Germany, 2-3 Apr C. G. Papadopoulos, R. H. P. Kleiss and E. N. Argyres, Prepared for 28th Rencontres de Moriond: Electroweak Interactions and Unified Theories, Les Arcs, France, Mar Event generators for W W physics D. Y. Bardin et al. arxiv:hep-ph/ Prepared for 3rd CERN Workshop on LEP2 Physics, Geneva, Switzerland, 2-3 Nov WW Cross-sections and Distributions W. Beenakker et al. arxiv:hep-ph/ Triple Gauge Boson Couplings G. Gounaris et al. arxiv:hep-ph/ Prepared for AGS / RHIC Users Annual Meeting, Upton, New York, Jun Standard Model Processes at LEP-2 F. Boudjema et al. arxiv:hep-ph/ Presented at the 3rd General Meeting on Physics at LEP-2, CERN, Geneva, Switzerland, Nov 2-3, Perturbative results for multiparticle production E. N. Argyres, R. H. P. Kleiss and C. G. Papadopoulos CERN-TH Hellenic School of Elementary Particle Physics, Corfu, Greece, Sept 2-5, Compositeness E. Argyres et al. CERN-TH D To appear in the Proceedings of the Large Hadron Collider Workshop, Aachen, Oct Alternative Symmetry Breaking And Exotica S. Dimopoulos et al. CERN-TH To appear in Proc. of Large Hadron Collider Workshop, Aachen, Germany, Oct 4-9, 1990 PhD Thesis. Mǫλ ǫτ η παραγωγής αδρoνικών πιδάκων στ α πλαίσια µη καθιǫρωµ ǫνων πρoτύπων ( Jet production beyond the Standard Model ), PhD Thesis, University of Athens, Physics Department, June Advisory Committee: Prof. N. Antoniou, (main advisor), Prof. C. Kourkoumelis and Prof. S. Vlassopulos. 13

14 Publications-Citations On October, 2006, there were 2362 citations for my 79 publications (H factor: 22) (data from the SLAC-spires data-base). 14

15 References Prof. Frits BERENDS Leiden University tel: +31 (0) Prof. George GOUNARIS University of Thessaloniki tel: +(30) Prof. Wolfgang HOLLIK Director Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) tel: +(49) Prof. Ronald KLEISS University of Nijmegen tel: (+31) Prof. Athanasios LAHANAS University of Athens tel: +(30) Prof. Giampiero PASSARINO Torino University tel: +(39) Prof. James STIRLING Fellow of the Royal Society IPPP, University of Durham tel: +44-(0) (direct) tel: +44-(0) (IPPP Office) wjs/main.html 15

16 ÈÖÓÓÑ Ó ÔÖÓÑ Ø Ö Ø Ò Ø ÓÑ Ø Ð ØÓÑ ÖÓ ÓÔ ÔÔ ÓºÀ Ò¹ project) Ò Ñ Ò Ø Ò ÔÓØ Ð ÓÙÒ Ò Ñ ÐÓ Ñ ΥΠΟΜΝΗΜΑ ΕΡΓΑΣΙΩΝ Ø ÛÒ Ò ØÓÖ Ò ÒÛÖ Ñ ÒÓÑ ÔÓÐ Ñ ÒØ ÔÖÓ ÓÖ ØÓ Ò Ø Ø Ò ÛÖ Ø Ø Ò Ô ØÙÕ ÓÐÓ Ð ÖÛ ØÛÒÔ Ö Ñ ØÛÒ ÙØôÒº ÌÓ Ô Ø ÑÓÒ Ô ÓØÓÓÔÓÓ Ö Ô ÒÓÑ ÒÓÐÓ ØÛÒ ØÓ Õ Û ôò ÛÑ ¹ Ì Ô Ö Ñ Ø ØÓÙÑ ÐÓÙ Ô Ø ÕÙÒØ ØÛÒ ÖÕ Ñ ÒÛÒ Ø ôò LHC ILC (the International Linear collider ÓÑ ÒÓÐÓ ØÛÒ ØÓ Õ Û ôò ÛÑ Ø ÛÒ particle physics phenomenologyµ ÔÓØ Ð ÕÖÓÒ ÛÑ Ø Ù Ø Ó Ø Ò Ø ÙÒ Ø Ø ÔÛ Ô Ö ôò ÛÖ Ø ôòôöó Ð Ý ÛÒÑ ÓÔ Ø Ò Ü ÓÔÓ ØÛÒÔ Ö Ñ Ø ôò ÓÑ ÒÛÒ Ó Ø Ò Ø ÙÒ Ø Ò ØÖÓ Ó Ø ØÛÒ ÛÖ Ø ôò Ô Ü Ö ôò Ñ Ó Ò Ô ÖÓÒÓÑ Ø Ø ÒÔ Ö Û Ò Òô º 1. Ερευνητικα ενδιαφε ροντα Οι εργασι ες µου αναφε ρονται σε ε να ευρυ φα σµα περιοχω ν της Φυσικη ς των Υψηλω ν Ενεργειω ν. Σε γενικε ς γραµµε ς θα µπορου σαν να ταξινοµηθου ν ως εξη ς : Ανα πτυξη της µεθοδολογι ας της κβαντικη ς θεωρι ας πεδι ου. Η διατυ πωση επακριβω ν θεωρητικω ν προβλε ψεων απαιτει κατ αρχη ν την ανα πτυξη της κβαντικη ς θεωρι ας πεδι ου. Σηµαντικη συµβολη στο πεδι ο αυτο αποτελει η ανα πτυξη των αναδροµικω ν σχε σεων (recursive equations), και ειδικο τερα των σχε σεων Dyson-Schwinger. Η µεθοδολογι α αυτη µας επιτρε πει να αντιµετωπι σουµε µε επιτυχι α τις προκλη σεις που αφορου ν τον υπολογισµο κβαντικω ν διορθω σεων ανω τερης τα ξης, και να µας οδηγη σουν κατα συνε πεια σε ασφαλει ς προβλε ψεις. Η ανακα λυψη νε ων αναδροµικω ν σχε σεων (on-shell recursive equations) απο την µελε τη τοπολογικω ν θεωριω ν χορδω ν και η κατανο ηση της σχε σης τους µε την συνη θη προσε γγιση α νοιξε νε ους ενδιαφε ροντες ο σο και απρο σµενους δρο µους στην ε ρευνα. Ιδιαι τερα σηµαντικη ει ναι και η προ σφατη εργασι α σχετικα µε την αναγωγη διαγραµ µα των ενο ς κβαντικου βρο χου (reduction at the integrand level) που επιτρε πει για πρω τη φορα την µελε τη πολυσωµατιδιακω ν πλατω ν σκε δασης, πε ραν του επιπε δου δε νδρου (tree order). Εργασι ες : 25, 26, 34, 48, 53, 56, 57, 61, 63, 65, 67. Μελε τη ασταθω ν σωµατιδι ων στην θεωρι α διαταραχω ν και επανακανονικοποι ηση. Η συνεπη ς διαταρακτικη περιγραφη των ασταθω ν σωµατιδι ων, ο πως π.χ. W ±, Z στα πλαι σια του καθιερωµε νου προτυ που, ει ναι το αντικει µενο µελε της σε σηµα ντικο τµη µα της βιβλιογραφι ας. Το επονοµαζο µενο Fermion-Loop scheme, µε βα ση την µελε τη των κλειστω ν φερµιονικω ν βρο χων σε ο λες τις τα ξεις της θεωρι ας διαταραχω ν, µας δι νει την δυνατο τητα να κατανοη σουµε µε συνεπη ως προς την συµµετρι α βαθµι δας τρο πο, την περιγραφη διαδικασιω ν µε ασταθη σωµα τια. Με την υιοθε τηση του κατα λληλου 1

17 σχη µατος επανακανονικοποι ησης (complex pole), ε χουµε µια αξιο πιστη µε θοδο για την παραγωγη επαληθευ σιµων προβλε ψεων. Η αξιο πιστη περιγραφη των ασταθω ν σωµατιδι ων ε χει κεφαλαιω δη σηµασι α για την φυσικη, το σο στην µελε τη συγκρου σεων e + e ο σο και στους αδρονικου ς επιταχυντε ς. Εργασι ες : 37, 38, 43, 45, 61. Μελε τη των ηλεκτρασθενω ν και των ισχυρω ν αλληλεπιδρα σεων. Στην ενο τητα αυτη µελετα µε τις προβλε ψεις των κβαντικω ν θεωριω ν πεδι ου σε διαδικασι ες σκε δασης. Αυτο απαιτει αφ ενο ς υπολογισµου ς των πλατω ν σκε δασης σε επι πεδο δε νδρου καθω ς και των κβαντικω ν διορθω σεων, και αφ ετε ρου Monte Carlo τεχνικε ς ολοκλη ρωσης πα νω στον πολυδια στατο χω ρο των φα σεων. ιαδικασι ες µε 4 φερµιο νια, 4 φερµιο νια +γ και 6 φερµιο νια σε συγκρου σεις e + e. Ανα πτυξη µεθολογι ας, το σο για τον υπολογισµο σε επι πεδο δε νδρου των πλατω ν σκε δασης ο σο και των αλγορι θµων για ολοκλη ρωση στο χω ρο των φα σεων και την προσοµοι ωση δεδοµε µων. Μελε τη των κβαντικω ν διορθω σεων πρω της τα ξης. Η δυνατο τητα αξιο πιστων υπολογισµω ν των παραπα νω διαδικασιω ν επιτρε πει την µελε τη των των ιδιοτη των των διανυσµατικω ν µποζονι ων, της αλλη λεπι δραση τους µε το ηλεκτροµαγνητικο πεδι ο και µεταξυ τους, (LEP200, ILC). ιαδικασι ες µε αδρονικου ς πι δακες σε συγκρου σεις pp και p p. Με την ανα πτυξη των κατα λληλων θεωρητικω ν επεξεργασιω ν και υπολογι στικω ν προγραµµα των (HELAC, PHEGAS, HAAG, JETi), ει µαστε σε θε ση να µελετη σουµε την παραγωγη πολλων (2 8) αδρονικω ν πιδα κων (jets), ο πως και µια σειρα αντιδρα σεων, π.χ. W +jets, Z+jets, nv +jets αλλα και παραγωγη Higgs. Με τον τρο πο αυτο µπορου µε να µελετη σουµε σηµαντικε ς παραµε τρους, ο πως η µα ζα και το πλα τος των W, Z και Higgs, τις τριγραµµικε ς συζευ ξεις του Higgs ( που συνδε ονται α µεσα µε τον µηχανισµο παραβι ασης της συµµετρι ας SU(2) µηχανισµο Higgs ), κ.α. Εργασι ες : 12, 16, 19, 21, 22, 24, 31, 36, 37, 38, 40,41, 43, 44, 45, 46, 47, 48, 49, 53, 54, 55, 58, 59, 62, 64, 66. Φαινοµενολογι α αλληλεπιδρα σεων πε ραν του καθιερωµε νου προτυ που. Παρα το γεγονο ς ο τι το καθιερωµε νο προ τυπο Standard Model περιγρα φει µε ακρι βεια το συ νολο των γνωστω ν αλληλεπιδρα σεων των στοιχειωδω ν σωµατιδι ων, αδυνατει να ερµηνευ σει σειρα φαινοµε νων, ο πως για παρα δειγµα την υ παρξη µεγα λης ιεραρχι ας κλιµα κων στις µα ζες των φερµιονι ων. Πολλε ς εναλλακτικε ς θεωρι ες ε χουν διατυπωθει, προσπαθω ντας να αντιµετωπι σουν κα ποια απο τα ανοιχτα προβλη µατα. Κυ ριες προσπα θειες στην κατευ θυνση αυτη ει ναι η υπερσυµ µετρι α, θεωρι ες µε µεγα λες συµµετρι ες βαθµι δος, η υπο θεση συνθετο τητας των στοιχειωδω ν σωµατι ων, κ.α. Τα τελευται α χρο νια η προσπα θεια περιγραφη ς της 2

18 βαρυ τητας οδη γησε στην θεωρι α των υπερχορδω ν. Στο χος των εργασιω ν αυτη ς της κατηγορι ας ει ναι η µελε τη των προβλε ψεων των θεωριω ν αυτω ν και η προσπα θεια συσχε τισης τους µε τα πειραµατικα δεδοµε να. Εργασι ες : 1, 2, 3, 6, 13, 15, 23, 39, 45, 51. Πολυσωµατιδιακη σκε δαση το ο ριο µεγα λων πολλαπλοτη των της κβαντικη ς θεωρι ας πεδι ου ιαδικασι ες κατα τις οποι ες παρα γεται µεγα λος αριθµο ς βαθµωτω ν σωµατι ων (π.χ.higgs) ε χουν ιδιαι τερο ενδιαφε ρον απο θεωρητικη ς και πειραµατικη ς πλευρα ς. Χα ρις στους µεγα λους υπερεπιταχυντε ς (LHC) ει ναι δυνατο ν, κινηµατικα, να παραχθει ε νας µεγα λος αριθµο ς σωµατι ων. Απο θεωρητικη ς πλευρα ς προσεγ γι ζουµε τα ο ρια εφαρµοσιµο τητας της θεωρι ας διαταραχω ν. Ζητη µατα ο πως, η µετατροπη των ασθενω ν αλληλεπιδρα σεων σε ισχυρε ς καθω ς και η αναζη τηση θεωριω ν που να οδηγου ν σε συνεπη περιγραφη της πολυσωµατιδιακη ς σκε δασης, αποτελου ν τον περιεχο µενο αυτω ν των εργασιω ν. Εργασι ες : 25, 26, 27, 29, 30, 32, 33, 34, 42. Μεταβολε ς φα σης στην αδρονικη φυσικη, σποραδικο τητα και χαοτικη δυναµικη. Προσπαθω ντας να κατανοη σουµε την µετατροπη των quarks και των gluons σε αδρο νια, ουσιαστικα την δυναµικη του confinment, προσεγγι ζουµε το προ βληµα µε βα ση την φυσικη των µετατροπω ν φα σης. Ειδικο τερα σε διαδικασι ες κατα τις οποι ες συµµετε χουν µεγα λος αριθµο ς αδρονι ων η στατιστικη εικο να προσεγγι ζει πληρε στερα την πραγµατικο τητα. Ιδιαι τερο ενδιαφε ρον παρουσια ζει η συ νδεση µε το πεδι ο της χαοτικη ς δυναµικη ς, ο που ε ννοιες ο πως η γεωµετρι α fractal ει ναι περισσο τερο επεξεργασµε νες και συνδεδεµε νες µε την δυναµικη του συστη µατος. Ως βασικο, τε λος εργαλει ο ανα λυσης, χρησιµοποιει ται η σποραδικο τητα που εµφανι ζε ται στις πειραµατικα µετρου µενες παραγοντικε ς ροπε ς. Εργασι ες : 5, 10, 14, 17, 18, 20, 28, 35, 50. Θε µατα ευρυ τερου ενδιαφε ροντος. Ε χω επι σης εργαστει σε µια σειρα θε µατα ο πως, η κλασσικη κβα ντωση του βαρυτικου πεδι ου, η θεωρι α χορδω ν και η διδια στατη βαρυ τητα, αλλα και η µελε τη της discrepancy σε ακολουθι ες quasi-random αριθµω ν και των εφαρµογω ν τους σε προβλη µατα Monte-Carlo ολοκλη ρωσης. Εργασι ες : 4, 7, 8, 9, 11. Μια α λλη σηµαντικη πλευρα της ερευνητικη ς µου δραστηριο τητας ει ναι η ανα πτυξη συνεργασιω ν µε συναδε λφους πειραµατικου ς, δεδοµε νου ο τι ε τσι εξυπηρετου νται καλυ τερα οι ερευνητικοι στο χοι της επιστηµονικη ς µας κοινο τητας. Αυτο ε χει η δη επιτευχθει µε πολλε ς πειραµατικε ς οµα δες απο το DELPHI το ALEPH το L3 και το OPAL, κυρι ως σε θε µατα φυσικη ς των σταθερω ν ζευ ξης των βαριω ν διανυσµατικω ν µποζονι ων, θε µα ιδιαι τερα σηµαντικο για το προ γραµµα του LEP200. Αντι στοιχες συνεργασι ες ε χουν 3

19 αναπτυχθει και στα πλαι σια του προγρα µµατος LHC (upgrade LHC, associated multi-jet production, trilinear Higgs couplings, compositeness signals, etc.). Μια α λλη πλευρα της δραστηριο τητας µου αφορα το διεθνε ς προ γραµµα του International Linear Collider. Το προ γραµµα αφορα την κατασκευη ενο ς γραµµικου επιταχυντου ηλεκτρονι ων ποζιτρονι ων σε ενε ργειες απο 100 GeV ε ως 2 TeV, και η συµµετοχη µου υπη ρξε και παραµε νει ενεργη σε ο λες τις φα σεις µελετω ν φυσικη ς. Σηµαντικο τµη µα της ο λης δραστηριο τητας µου αποτελει και η εκπαι δευση µε σω της ε ρευνας διδακτορικω ν φοιτητω ν. Παρα ληλλα ε χω οργανω σει και διδα ξει το µα θηµα µε τι τλο Υπολογιστικε ς τεχνικε ς µε εφαρµογε ς στην φαινοµενολογι α υψηλω ν ενεργειω ν. Το µα θηµα αυτο αποτελει ται απο επιλεγµε να θε µατα της κβαντικη ς θεωρι ας πεδι ου που αφορου ν υπολογισµου ς πλατω ν σκε δασης και τεχνικω ν Monte Carlo για πολυδια στατες ολοκληρω σεις προσοµοιω σεις. 2. Συνοπτικη παρουσι αση δηµοσιευµε νων εργασιω ν Στην συνε χεια αναφε ροµαι περιληπτικα σε κα θε εργασι α. Η αρι θµηση αντιστοιχει σε αυτη του βιογραφικου σηµειω µατος, και οι citations ει ναι απο το SLAC-SPIRES. 1. Jets with small missing energy at CERN and Fermilab in Supersymmetry. [Cited 2 times]. Στην εργασι α αυτη υπολογι ζουµε την συµµετοχη των υπερσυµµετρικω ν διαδικασιω ν σε γεγονο τα µε µικρη ελλει πουσα εγκα ρσια ενε ργεια, µε δυ ο και τρει ς αδρονικου ς πι δακες, σε συγκρου σεις πρωτονι ου αντιπρωτονι ου στο CERN και το Fermilab. Η πρωτοτυπι α της εργασι ας στηρι ζεται στο γεγονο ς ο τι για πρω τη φορα γεγονο τα µε µικρο ε λλειµα ενε ργειας χρησιµοποιου νται για την µελε τη της υπερσυµµετρι ας. Συγκρι νοντας µε το µετρηµε νο πηλι κο σ 2 /σ 3 ο που σ n η ενεργο ς διατοµη παραγωγη ς n πιδα κων, παι ρνουµε ο ρια για τις µα ζες των υπερσυµµετρικω ν σωµατι ων της τα ξης των GeV. 2. Bounds on the top-quark mass in N=1 supergravity models. Στην εργασι α αυτη αναλυ ουµε το υπερδυναµικο της N = 1 υπερβαρυ τητας και τις εξισω σεις εξε λιξης (renormalization group equations) των µαζω ν και των σταθερω ν ζευ ξης των υπερσυµµετρικω ν Higgs. Απο την ελαχιστοποι ηση του δυναµικου εξα γουµε ο ρια στην µα ζα του top-quark στα πλαι σια των υπερβαρυτικω ν προτυ πων. 3. Jet signatures of scalar diquarks from superstrings at CERN and Fermilab. [Cited 13 times]. Στην εργασι α αυτη υπολογι ζουµε την συµµετοχη στην ενεργο διατοµη 4 αδρονικω ν πιδα κων των βαθµωτω ν diquarks που προβλε πονται απο την θεωρι α των υπερχορδω ν. Αποδεικνυ ουµε οτι η ευαισθησι α σχετικα µε την µα ζα τους ανε ρχεται σε 40 GeV για ενε ργειες του CERN-collider και σε 70 GeV για Fermilab-Tevatron ενε ργειες. 4. Quantization of Robertson-Walker geometry coupled to a spin times]. field. [Cited 4

20 Με την βοη θεια της θεωρι ας Dirac για συστη µατα µε συνδε σµους µελετα µε την ζευ ξη ενο ς πεδι ου µε spin 3, µε το βαρυτικο πεδι ο. Χρησιµοποιω ντας την υπο θεση 2 ισοτροπι ας και οµογε νειας του χωρο χρονου λυ νουµε την Wheeler-deWitt εξι σωση και αποδεικνυ ουµε οτι η πυκνο τητα πιθανο τητας µηδενι ζεται ο ταν ο παρα γοντας κλι µακας τει νει στο µηδε ν. 5. Unusual phenomena in the rapidity distribution and the phase transition of the quark-gkuon plasma. Στην εργασι α αυτη µελετα µε την παραγωγη µεσονι ων και βαρυονι ων, ως το αποτε λεσµα µιας µετατροπη ς φα σης του quark-gluon plasma, στα πλαι σια ενο ς διδια στατου προτυ που. Οι υπολογισµοι µας οδηγου ν στην εµφα νιση µη συνιθησµε ν ων φαινοµε νων στην κατανοµη της rapidity, σε πλη ρη δια κριση απο την QCD και το Dual Parton Model. 6. Jet cross section probing possible quark substructure at hadron colliders. [Cited 3 times]. Στην εργασι α αυτη υπολογι ζουµε τις γωνιακε ς κατανοµε ς δυ ο και τριω ν αδρονικω ν πιδα κων λαµβα νοντας υπ ο ψιν αλληλεπιδρα σεις επαφη ς µεταξυ των quarks. Η ευαισθησι α των µεγεθω ν αυτω ν σε σχε ση µε την κλι µακα συνθετο τητας ει ναι ιδιαι τερα µεγα λη και ανε ρχεται στα GeV. 7. Local supersymmetry, superconformal algebra in two dimensions and strings in background fields. [Cited 1 times]. Στην εργασι α αυτη δει χνουµε πως η D=2 υπερσυ µµορφη α λγεβρα προκυ πτει απο την διδια στατη υπερβαρυ τητα. Στην συνε χεια µελετα µε το υπερσυµµετρικο µη γραµµικο σ προ τυπο σε υπο βαθρο ενο ς πεδι ου dilaton. Η απαι τηση µηδενισµου της συνα ρτησης β σε τα ξη τριω ν κβαντικω ν βρο χων οδηγει σε νε ες δυναµικε ς εξι σωσεις για το πεδι ο dilaton, µ ν φ = Quantum dynamical aspects of two-dimensional spaces with constant negative curvature. Στην εργασι α αυτη µελετα µε την κβαντοµηχανικη διδια στατων χω ρων µε αρνητικη καµπυλο τητα, και αναλυ ουµε την σχε ση µεταξυ διαφορετικω ν φορµαλισµω ν. Τε λος αποδεικνυ ουµε οτι ο κβαντοµηχανικο ς διαδο της παρουσια ζει χαοτικε ς ιδιο τητες. 9. C-number anomalies on a curved world-sheet. Στην εργασι α αυτη δει χνουµε οτι η συ µµορφη ανωµαλι α της µποζονικη ς χορδη ς περιε χει ο ρους ανα λογους της διδια στατης καµπυλο τητας. Η περι φηµη σχε ση D = 26 δεν ει ναι παρα το αποτε λεσµα της αναλλοιω τητας κα τω απο µετασχη µατισµου ς βαθµι δος. 10. The Gross-Neveu model near the critical temperature; a mechanism for quarkhadron phase transition. [Cited 2 times]. Με την υπο θεση οτι η διαµη κης δυναµικη του quark-gluon plasma σε αλληλεπι δρα σεις βαρε ων ιο ντων µπορει να περιγραφει απο το προ τυπο Gross-Neveu, µελετα µε 5