Measurement of direct f0(980) photoproduction on the proton

We report on the results of the first measurement of exclusive f_{0}(980) meson photoproduction on protons for E_{gamma}=3.0-3.8 GeV and -t=0.4-1.0 GeV2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The resonance was detected via its decay in the...

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Veröffentlicht in:	Physical review letters 2009-03, Vol.102 (10), p.102001-102001
Hauptverfasser:	Battaglieri, M, De Vita, R, Szczepaniak, A P, Adhikari, K P, Aghasyan, M, Amaryan, M J, Ambrozewicz, P, Anghinolfi, M, Asryan, G, Avakian, H, Bagdasaryan, H, Baillie, N, Ball, J P, Baltzell, N A, Batourine, V, Bedlinskiy, I, Bellis, M, Benmouna, N, Berman, B L, Bibrzycki, L, Biselli, A S, Bookwalter, C, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Briscoe, W J, Brooks, W K, Bültmann, S, Burkert, V D, Calarco, J R, Careccia, S L, Carman, D S, Casey, L, Chen, S, Cheng, L, Clinton, E, Cole, P L, Collins, P, Crabb, D, Crannell, H, Crede, V, Cummings, J P, Dale, D, Daniel, A, Dashyan, N, De Masi, R, De Sanctis, E, Degtyarenko, P V, Deur, A, Dhamija, S, Dharmawardane, K V, Dickson, R, Djalali, C, Dodge, G E, Donnelly, J, Doughty, D, Dugger, M, Dzyubak, O P, Egiyan, H, Egiyan, K S, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fedotov, G, Fersch, R, Forest, T A, Fradi, A, Gabrielyan, M Y, Gan, L, Garçon, M, Gasparian, A, Gavalian, G, Gevorgyan, N, Gilfoyle, G P, Giovanetti, K L, Girod, F X, Glamazdin, O, Goett, J, Goetz, J T, Gohn, W, Golovatch, E, Gordon, C I O, Gothe, R W, Graham, L, Griffioen, K A, Guidal, M, Guler, N, Guo, L, Gyurjyan, V, Hadjidakis, C, Hafidi, K, Hakobyan, H, Hakobyan, R S, Hanretty, C, Hardie, J, Hassall, N, Heddle, D, Hersman, F W, Hicks, K
Format:	Artikel
Sprache:	eng
Schlagworte:	Nuclear Experiment Physics
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Zusammenfassung:	We report on the results of the first measurement of exclusive f_{0}(980) meson photoproduction on protons for E_{gamma}=3.0-3.8 GeV and -t=0.4-1.0 GeV2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The resonance was detected via its decay in the pi;{+}pi;{-} channel by performing a partial wave analysis of the reaction gammap-->ppi;{+}pi;{-}. Clear evidence of the f_{0}(980) meson was found in the interference between P and S waves at M_{pi;{+}pi;{-}} approximately 1 GeV. The S-wave differential cross section integrated in the mass range of the f_{0}(980) was found to be a factor of about 50 smaller than the cross section for the rho meson. This is the first time the f_{0}(980) meson has been measured in a photoproduction experiment.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.102.102001