Bonn-Gatchina analysis of photoproduction data

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1 atchina analysis of photoproduction data ECT workshop, Trento Bonn-Gatchina analysis of photoproduction data A. Sarantsev Petersburg Nuclear Physics Institute HISKP, Bonn (Bonn University) PNPI, Gatchina (Russia) 3-7 June 4

2 atchina analysis of photoproduction data ECT workshop, Trento The spin wave function S = 3/ : fully symmetric S = / : ( ) mixed symmetry.. The flavor wave function SU() SU(3) = SU(6) = 56 S 7 M 7 M A 56 = = = 8 4.

3 atchina analysis of photoproduction data ECT workshop, Trento (56, 3 ) S S = 3/;L = ; N= / (9) 3/ (94) 5/ (93) 95 MeV S S = /;L = ; N= N / (895) N 3/ (875) 866 MeV 3 rd band (7,3 3 ) S 3 S = /;L = 3; N= 5/ (3) 7/ () 3 MeV S 5 S = 3/;L = 3; N= N 3/ (5) N 9/ (5) 3 MeV N 5/ (6) N 7/ (9) S 4 S = /;L = 3; N= 5 MeV (56,3 3 ), (,3 3 ), (7, 3 ), (7, 3 ), (7, 3 ), (, 3 ) : Many states predicted, no candidates known (56, + ) S S = 3/;L = ; N= / +(9) 3/ +(9) 5/ +(95) 7/ +(95) 95 MeV S S = /;L = ; N= N 3/ +(7) N 5/ +(6) 779 MeV (7, + ) S 3 S = /;L = ; N= 3/ + 5/ + 95 MeV S 5 S = 3/;L = ; N= N / +(88) N 3/ +(96) N 5/ +() N 7/ +(99) 95 MeV S 4 S = /;L = ; N= N 3/ +(9) N 5/ +(86) 866 MeV nd band (, + ) S 6 S = /;L = ; N= N / + N 3/ + 8 MeV (56, + ) S S = 3/;L = ; N= 3/ +(6) 63 MeV S S = /;L = ; N= N / +(44) 43 MeV (7, + ) S 3 S = /;L = ; N= / + 63 MeV S 5 S = 3/;L = ; N= N 3/ + 63 MeV S 4 S = /;L = ; N= N / + 53 MeV (7, ) S 3 S = /;L = ; N= / (6) 3/ (7) 63 MeV st band S 5 S = 3/;L = ; N= N / (65) N 3/ (7) N 5/ (675) 63 MeV S 4 S = /;L = ; N= N / (535) N 3/ (5) 53 MeV Ground (56, + ) S S = 3/;L = ; N= 3/ +(3) 3 MeV state S S = /;L = ; N= N / +(939) 939 MeV 3

4 atchina analysis of photoproduction data ECT workshop, Trento Bonn-Gatchina partial wave analysis group: A. Anisovich, E. Klempt, V. Nikonov, A. Sarantsev, U. Thoma. The new solutions BG4- and BG4- will be released next week 4

5 atchina analysis of photoproduction data ECT workshop, Trento Baryon data base DATA BG added in BG4 πn πn ampl. γp πn γn πn γn ηn γp ηp γp K + Λ γp K + Σ γp K Σ + π p ηn π p K Λ π p K Σ π p K + Σ π + p K + Σ + π p π π n γp π π p γp π ηp γp ωp SAID or Hoehler energy fixed dσ dσ dω,σ,t,p,e dσ,σ dω dσ,σ dω dω,σ,p,t,c x,c z,o x,o z dσ,σ,p,c dω x,c z dσ,σ,p dω dσ dσ dσ dω dω,p,β dσ,p dω dσ dω,p,β dσ dω,σ,e,i dω c,i s dσ,σ,i dω c,i s dσ Σ (CLAS),T,P,G,H,E (CB-ELSA) dσ,σ,t,p dω dσ dω (MAMI) T,P,H,E (CB-ELSA) dσ dω (MAMI) dσ dω (MAMI) Σ (CLAS),Σ,P (CB-ELSA) dσ dω dω (MAMI,CB-ELSA),Σ,I c,i s (CB-ELSA) dσ,i dω c,i s (CB-ELSA) dσ dω,σ,ρ ij,ρ ij,ρ ij,e,g (CB-ELSA) 5

6 atchina analysis of photoproduction data ECT workshop, Trento N/D based (D-matrix) analysis of the data π η K J m J K m δ JK D jm = D jk α Bα km (s) M m s + δ jm Mj s π η K ˆD = ˆκ(I ˆBˆκ) ( ) ˆκ = diag M s, M s,..., MN s,r,r... ˆB ij = α B ij α = α ds π g (R)i α ρ α (s,m α,m α )g (L)j α s s i 6

7 atchina analysis of photoproduction data ECT workshop, Trento In the present fits we calculate the elements of theb ij α the channel thresholdm α = (m α +m α ): using one subtraction taken at B ij α(s) = B ij α(m α)+(s M α) ds π g (R)i α ρ α (s,m α,m α )g α (L)j (s s i)(s Mα). m a In this case the expression for elements of the ˆB matrix can be rewritten as: Bα(s) ij = g a (R)i b α +(s M α) m a ds π ρ α (s,m α,m α ) (s s i)(s Mα) g (L)j β = g a (R)i B α g (L)j β and D-matrix method equivalent to the K-matrix method with loop diagram with real part taken into account: A = ˆK(I ˆB ˆK) B αβ = δ αβ B α 7

8 atchina analysis of photoproduction data ECT workshop, Trento Minimization methods. The two body final statesπn,γn πn,ηn,kλ,kσ,ωn,k Λ:χ method. For n measured bins we minimize χ = n j (σ j (PWA) σ j (exp)) ( σ j (exp)) Present solutionχ = 487 for38 points.χ /N F =.6. Reactions with three or more final states are analyzed with logarithm likelihood method.πn,γn ππn,πηn,ωp,k Λ. The minimization function: f = N(data) j ln N(recMC) m σ j (PWA) σ m (PWA) This method allows us to take into account all correlations in many dimensional phase space. Above 5 data events are taken in the fit. 8

9 atchina analysis of photoproduction data ECT workshop, Trento Differential cross sectionγp pπ η (CB-ELSA) dσ/d M(pπ ) (µb/.35 GeV) dσ/d M(π η) (µb/.36 GeV) M(pπ ) (GeV) M(π η) (GeV) 9

10 atchina analysis of photoproduction data ECT workshop, Trento Differential cross sectionγp pπ η (CB-ELSA) dσ/d cos θ(π ) (µb/.) dσ/d cos θ(η) (µb/.) cos θ(π ) cos θ(η)

11 atchina analysis of photoproduction data ECT workshop, Trento γp pπ η (CB-ELSA)with linear polarized photon dσ dω = ( ) dσ {+δ l [I s sin(φ)+i c cos(φ)]}, () dω Σ = π I c dφ

12 atchina analysis of photoproduction data ECT workshop, Trento Σ forγp pπ η (CB-ELSA).5 Σ(p) W=76 Σ(p) W=834 Σ(p) W=946.5 Σ(p) W=76 Σ(p) W=834 Σ(p) W= cos θ(p) cos θ(p) cos θ(p) M(π η) (MeV) M(π η) (MeV) M(π η) (MeV).5 Σ(π ) W=76 Σ(π ) W=834 Σ(π ) W=946.5 Σ(η) W=76 Σ(η) W=834 Σ(η) W= cos θ(π ) cos θ(π ) cos θ(π ) 3 4 M(pπ ) (MeV) 3 4 M(pπ ) (MeV) 3 4 M(pπ ) (MeV).5 Σ(η) W=76 Σ(η) W=834 Σ(η) W=946.5 Σ(π ) W=76 Σ(π ) W=834 Σ(π ) W= cos θ(η) cos θ(η) cos θ(η) 6 8 M(pη) (MeV) 6 8 M(pη) (MeV) 6 8 M(pη) (MeV) Bonn-Gatchina M. Döring et al. A. Fix et al.

13 atchina analysis of photoproduction data ECT workshop, Trento I c andi s forγp pπ η (CB-ELSA).5 Ip c Ip c Ip c W=76 W=834 W=946.5 Ip s Ip s Ip s W=76 W=834 W= Iπ c Iπ c Iπ c W=76 W=834 W=946.5 Iπ s Iπ s Iπ s W=76 W=834 W= I c η W=76 I c η W=834 I c η W=946.5 I s η W=76 I s η W=834 I s η W= Φ* (deg) 3 Φ* (deg) 3 Φ* (deg) 3 Φ* (deg) 3 Φ* (deg) 3 Φ* (deg) Bonn-Gatchina M. Döring et al. A. Fix et al. 3

14 atchina analysis of photoproduction data ECT workshop, Trento Branching ratios of nucleon and resonances Resonance πn N(535)π (3)η N(7)/ + 5±3% 5±6% - N(88)/ + 6±3% 8±4% - N(9)3/ + 3±3% 7±3% - N()/ + 3±% ±8% - N()3/ 5±3% 5±8% - (7)3/ ±4% ±.5% 5±% (9)/ 7±% - ±% (95)5/ + 3±% % 4±% (9)/ + ±3% 5±3% 9±4% (9)3/ + 8±4% % ±6% (94)3/ ±% 8±6% ±6% (95)7/ + 46±% % 4

15 atchina analysis of photoproduction data ECT workshop, Trento Differential cross sectionγp pπ π (CB-ELSA) ) (pπ ) (GeV M ) (pπ ) (GeV M M M (pπ (pπ ) (GeV ) (GeV ) ) 5

16 atchina analysis of photoproduction data ECT workshop, Trento Differential cross sectionγp pπ π (CB-ELSA) dσ/d M(πp), µb/.35 GeV M(πp), GeV dσ/d M(ππ), µb/.35 GeV M(ππ), GeV 6

17 atchina analysis of photoproduction data ECT workshop, Trento Differential cross sectionγp pπ π (CB-ELSA) dσ/d cos θ(p), µb/ dσ/d cos θ(ππ), µb/ cos θ(p) cos θ(ππ) (hel) 7

18 atchina analysis of photoproduction data ECT workshop, Trento I c andi s forγp pπ π (CB-ELSA).5.5 I c p 97- I c p -45 I c p Iπ s (- -.5) -45 (- -.5) (- -.5) I s p 97- I s p -45 I s p (-.5 ) -45 (-.5 ) (-.5 ) I c π 97- I c π -45 I c π (.5) -45 (.5) (.5) I s π 97- I s π -45 I s π (.5 ) -45 (.5 ) (.5 ) Φ*, deg Φ*, deg Φ*, deg Φ*, deg Φ*, deg Φ*, deg 8

19 atchina analysis of photoproduction data ECT workshop, Trento I c andi s forγp pπ π (CB-ELSA) Ip c (- -.5) -45 (- -.5) (- -.5) Ip s (- -.5) -45 (- -.5) (- -.5) (-.5 ) -45 (-.5 ) (-.5 ) (-.5 ) -45 (-.5 ) (-.5 ) (.5) -45 (.5) (.5) (.5) -45 (.5) (.5) (.5 ) -45 (.5 ) (.5 ) (.5 ) -45 (.5 ) (.5 ) Φ*, deg Φ*, deg Φ*, deg Φ*, deg Φ*, deg Φ*, deg 9

20 atchina analysis of photoproduction data ECT workshop, Trento I c andi s forγp pπ π (CB-ELSA) Ip c (8-5) 97- (5-35) 97- (35-45) Ip s (8-5) 97- (5-35) 97- (35-45) (45-64) -45 (8-5) -45 (5-4) (45-64) -45 (8-5) -45 (5-4) (4-5) -45 (5-76) (8-5) (4-5) -45 (5-76) (8-5) (5-45) (45-6) (6-85) (5-45) (45-6) (6-85) Φ*, deg Φ*, deg Φ*, deg Φ*, deg Φ*, deg Φ*, deg

21 atchina analysis of photoproduction data ECT workshop, Trento The partial wave contributions to two meson photoproduction reactions γp π ηp γp π π p σ tot (µb) GRAAL MAMI CB/TAPS CB/TAPS η N(535)π a (98)p σ tot, µb D 3 D 3 P 3 P 3 F E γ (MeV) E γ, MeV

22 atchina analysis of photoproduction data ECT workshop, Trento Width and branching ratios of resonances in the nd and3 rd resonance region Γ (MeV) Nπ Nππ N(44)/ + 35±5.65±..35±.5 N(5)3/ 3±3.6±..5±. N(535)/ 5±5.45±..5±.5 N(65)5/ 55±3.7±..5±.5 N(675)5/ 5±.4±.5.55±.5 N(68)5/ + 3±.68±.3.35±.5 N(7)3/ 75±75.65±..35±.5 N(7)/ + 5±.3±.8.65±.5 N(7)3/ + 75±5.±.3.8±. (6)/ 4±.5±.5.5±.5 (7)3/ 3±.5±.5.75±.5

23 atchina analysis of photoproduction data ECT workshop, Trento Branching ratios (in %) for decays of nucleon and resonances N π L π L<J π L>J N(44)π L N(5)π L N(535)π L N(535)/ 5±5.5±.5 ±8 - - N(5)3/ 6± 9±4 9± N(65)/ 5±4 ±6 6± - - N(7)3/ 5±6 65±5 7±4 <4 - - N(675)5/ 4± 3± (6)/ 8± 6± 6±3 - - (7)3/ ±4 ± ±6-3± - N(7)3/ + ±4 6±5 6±6 3 < - - N(68)5/ + 6±4 3 7±3 ± (9)/ + ±3 5±6 6±3 - - (9)3/ + 8±4 8± 58±4 3 < 4 < 5 < (95)5/ + 3± 3 35± < (95)7/ + 46± 3 5±

24 atchina analysis of photoproduction data ECT workshop, Trento Branching ratios (in %) for decays of nucleon and resonances N π L π L<J π L>J N(44)π L N(5)π L N(535)π L N(88)/ + 6±3 3± - - 8±4 N(9)3/ + 3± 7±8 33± 3-5±8 7±3 N()5/ + 8±4 3 ± 34±5 3 - ± - N(99)7/ +.5± ± N(99)7/ + ±.5 3 6± N(895)/ ± 4±7 7±7 5±3 < - N(875)3/.5±.5 7± (9)/ 7± 5± - ± 6±4 - (94)3/ ± 46± ± N()3/ 5±3 5± ± N(6)5/ ± 7±3-4 9±5 5±5-3 N(9)7/ 6± 4 5± N(7)/ + 5±3 7± N(7)/ + 5±3 5± N()/ + 6±5 ± ±4 4

25 atchina analysis of photoproduction data ECT workshop, Trento Theγp KΛ reaction (CLAS 9) and MAMI. dσ/dω, µb/sr dσ/dω, µb/sr cos θ cm cos θ cm 5

26 atchina analysis of photoproduction data ECT workshop, Trento Theγp K + Σ reaction (CLAS 9) and MAMI.. dσ/dω, µb/sr dσ/dω, µb/sr cos θ cm cos θ cm 6

27 atchina analysis of photoproduction data ECT workshop, Trento First double polarization data from CB-ELSA: Helicity asymmetry andgobservable inγp π p E(γp π p) G(γp π p) cos θ π cos θ π Bonn-Gatchina, SAID (CM), MAID Bonn-Gatchina, SAID (CM), MAID dashed - predicted, full -fit 7

28 atchina analysis of photoproduction data ECT workshop, Trento Double polarization data from CB-ELSA (TPH)γp π p γp π p (T) CB cos θ γp π p (P) CB γp π p (H) CB cos θ cos θ 8

29 atchina analysis of photoproduction data ECT workshop, Trento Beam asymmetryγp nπ + andγp pπ (CLAS) Σ 3 π + n Σ 3 π p

30 atchina analysis of photoproduction data ECT workshop, Trento Observation of the (????) 7 dσ/dω, µb/sr Σ 3 χ total χ π p cos θ cm cos θ cm χ π + n χ KΣ M(G 37 ), MeV (????) 7 : M= MeVΓ=6±3 MeV. This state can not be a chiral partner of the (95) 7 + state. 3

31 atchina analysis of photoproduction data ECT workshop, Trento Parity doublets ofn and resonances at high mass region Parity doublets must not interact by pion emission and could have a small coupling toπn. J= J= 3 J= 5 J= 7 J= 9 N / +(88) ** N / (89) ** / +(9) **** / (9) ** N 3/ +(9) *** N 3/ (875) ** 3/ +(94) *** 3/ (99) ** N 5/ +(88) ** N 5/ (6) ** 5/ +(94) **** 5/ (93) *** N 7/ +(98) ** N 7/ (7) **** 7/ +(9) **** 7/ () * N 9/ +() **** N 9/ (5) **** 9/ +(3) ** 9/ (4) ** J= 5 J= 7 J= 9 N 5/ +(9) ** N 5/ (6) ** 5/ +(94) **** 5/ (93) *** N 7/ +() ** N 7/ (5) **** 7/ +(95) **** 7/ () * N 9/ +() **** N 9/ (5) **** 9/ +(3) ** 9/ (4) a ** 3

32 atchina analysis of photoproduction data ECT workshop, Trento Energy independent analysis of theπ p KΛ data magnitude magnitude magnitude..5. S. P P W(GeV). W(GeV) W(GeV) phase (deg) phase (deg) 5 P W(GeV) P W(GeV) However this is not a unique solution S magnitude W(GeV) P magnitude W(GeV) P 3 magnitude W(GeV) P phase (deg) W(GeV) phase (deg) P 3 W(GeV)

33 atchina analysis of photoproduction data ECT workshop, Trento Energy independent analysis of theγp KΛ data dσ/dω[mb/sr].4 W = MeV W= MeV Σ W = MeV.5.5 T W = MeV CLAS_ GRAAL_7 GRAAL_9 MAMI3 z -.5 z -.5 z P Ox Oz W = MeV.5 W = MeV.5 W = MeV.5.5 dσ/dω[mb/sr].4 W = MeV W= MeV Σ W = MeV.5.5 T W = MeV GRAAL_7 GRAAL_9 CLAS_6 CLAS_ MAMI3 z -.5 z -.5 z P Ox Oz W = MeV.5 W = MeV.5 W = MeV CLAS_ GRAAL_7 - GRAAL_9 z -.5 z Cx Cz W = MeV.5 W = MeV.5 - GRAAL_9 z - CLAS_ GRAAL_7 - GRAAL_9 z -.5 z Cx Cz W = MeV.5 W = MeV.5 - GRAAL_9 z CLAS_6 z CLAS_6 z - CLAS_6 z CLAS_6 z Black line: BnGa 4, dashed line: Kaon-MAID prediction. Dotted lines: PWA withl =, Dot-dashed line: PWA withl =,, 33

34 atchina analysis of photoproduction data ECT workshop, Trento Energy independent analysis of theγp KΛ data. Fit without penalty function magnitude[mfm] E magnitude[mfm] E E phase[deg] magnitude[mfm] M M phase[deg] magnitude[mfm] M M phase[deg] magnitude[mfm] E E phase[deg] magnitude[mfm] E E phase[deg] M magnitude[mfm] phase[deg] M magnitude[mfm] M M phase[deg]

35 atchina analysis of photoproduction data ECT workshop, Trento Energy independent analysis of theγp KΛ data χ pen = α (M α M, α ) (δm, α ) + α (E α Eα, ) (δeα,, ) magnitude[mfm] E magnitude[mfm].8 E E phase[deg] magnitude[mfm].5 M M phase[deg] magnitude[mfm] M M phase[deg] magnitude[mfm] E E phase[deg] E magnitude[mfm] E phase[deg] magnitude[mfm] M M phase[deg] magnitude[mfm] M M phase[deg]

36 atchina analysis of photoproduction data ECT workshop, Trento Energy independent analysis of theγp KΛ data. χ pen = α (M α M,, αbg ) (δm,, + αbg ) α (E α E,, αbg ) (δe,,, αbg ) magnitude[mfm] E magnitude[mfm] E E phase[deg] magnitude[mfm] M M phase[deg] magnitude[mfm] M M phase[deg] magnitude[mfm].45 E E phase[deg] E magnitude[mfm] phase[deg] 5 E magnitude[mfm].5 M M phase[deg] magnitude[mfm] M M phase[deg]

37 atchina analysis of photoproduction data ECT workshop, Trento New MAMI Data onγn ηn reaction Fermi motion smearing σ tot [µb] CB-ELSA CB-ELSA σ[µb] MAMI.5 H, this work 8 σ n /σ p H, Jaegle et al E γ [GeV] M(γn) [MeV] σ p σ n.8..4 E γ [GeV] B. Krusche group B. Krusche group 37

38 atchina analysis of photoproduction data ECT workshop, Trento Full event reconstruction Energy resolution of η: W =-4 MeV (W=5-85 MeV) [-.,-.9] [-.9,-.8] [-.8,-.7] [-.7,-.6] σ[µb] 5 σ n /σ p σ p (3/)*σ n σ p, free H, this work H, Jaegle et al..6.8 dσ/dω [µb/sr] [-.6,-.5] [-.,-.] [.,.3].5 [.6,.7] [-.5,-.4] [-.,.] [.3,.4].5 [.7,.8] [-.4,-.3] [.,.] [.4,.5].5 [.8,.9] [-.3,-.] [.,.] [.5,.6] [.9,.] data total func. S BW backgr. BW signal BW W[MeV] 38

39 atchina analysis of photoproduction data ECT workshop, Trento Simulation for thes andp interference 39

40 atchina analysis of photoproduction data ECT workshop, Trento Solution with interference betweens states σ, µb 5 σ n /σ p W, MeV 5 σ p 3/ σ n W, MeV 4

41 atchina analysis of photoproduction data ECT workshop, Trento Solutions with thep (68) states 4

42 atchina analysis of photoproduction data ECT workshop, Trento The description of the new data as well as GRAAL data is notably worse Limit for the production ofp (68): A Br(ηn) <5 Gev 3 4

43 atchina analysis of photoproduction data ECT workshop, Trento Photoproduction of vector mesons. γp pω (A.Wilson) dσ/dω (γp ωp), µb/sr cos θ ω 43

44 atchina analysis of photoproduction data ECT workshop, Trento Density matrices dσ = dσ W(cosΘ dec,φ dec ) dω ω dω dec dω ω γp pω(π + π π ) W(cosΘ,Φ) = 3 ( 4π ( ρ )+ (3ρ )cos Θ Reρ sinθcosφ ρ sin ΘcosΦ). cosθ,φ direction of the vectorn = ε ijkm p π+ j p π k p π m in theω rest frame. γp pω(γπ ) W(cosΘ,Φ) = 3 ( 8π (+cos Θ)+ ( 3cos Θ)ρ + Reρ sin(θ)cosφ+ρ sin ΘcosΦ). cosθ,φ angles of photon fromω decay in theω rest frame 44

45 atchina analysis of photoproduction data ECT workshop, Trento γp pω (CB-ELSA) (full) and CLAS (open circles) data ρ

46 atchina analysis of photoproduction data ECT workshop, Trento Fit of the density matrices γp pω (CB-ELSA) (A.Wilson) ρ ρ ρ ρ cos θ ω cos θ ω 46

47 atchina analysis of photoproduction data ECT workshop, Trento Polarized density matricesγp pω p(γπ ) dσ pol = dσ ( W +cos(φω )W sin(φ ω )W ) dω ω dω dec dω ω W (cosθ,φ) = 3 ( 8π (+cos Θ)ρ +sin Θρ + Reρ sin(θ)cosφ+ρ sin ΘcosΦ). W (cosθ,φ) = 3 8π ( Imρ sin(θ)sinφ+ρ sin ΘsinΦ) 47

48 atchina analysis of photoproduction data ECT workshop, Trento Fit of the polarized density matrices γp pω (A.Wilson) ρ ρ ρ ρ cos θ ω cos θ ω 48

49 atchina analysis of photoproduction data ECT workshop, Trento Fit of the polarized density matrices γp pω (A.Wilson) ρ ρ.5.5 ρ ρ cos θ ω cos θ ω 49

50 atchina analysis of photoproduction data ECT workshop, Trento Fit of the polarized density matrices γp pω (A.Wilson) ρ ρ ρ Im ρ cos θ ω cos θ ω 5

51 atchina analysis of photoproduction data ECT workshop, Trento Omega photoproduction and polarization observables from CB-ELSA H.Eberhard (PhD thesis) E Σ Σ π cos θ ω cos θ ω G G π cos θ ω cos θ ω cos θ ω 5

52 atchina analysis of photoproduction data ECT workshop, Trento Photoproduction of vector mesons. γp pω (A.Wilson) σ tot (γp ωp), µb P-exchange / 3/ + / 3/ / 5/ M(γp), MeV Strong contribution from the P 3 partial wave: interference of P 3 (7) and P 3 (9) states. A confirmation of thef 5 () state. A structure in the D 3 partial wave in the region MeV. No large contributions either from 7/ + or 7/ states are found 5

53 atchina analysis of photoproduction data ECT workshop, Trento SUMMARY The new polarized data on π photoproduction confirm the Bonn-Gatchina solution below GeV and provide an important information about resonances in the mass region -.3 GeV. The new data on double meson photoproduction were successfully fitted. The vector photoproduction data provide an important constraint for the combined analysis and reveal signals from resonances above GeV. However... A large amount of new data will be available soon and it looks like they are not well predicted by any model: new discoveries will come soon. 53