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Lombardo, S.; Battaglieri, M.; Celentano, A.; De Vita, R.; Filippi, A.; Glazier, D. I.; Rizzo, A.; Santopinto, E.; Stankovic, I.; Szczepaniak, A. P.; Watts, D.; Zana, L.; Adhikari, S.; Akbar, Z.; Ball, J.; Bashkanov, M.; Batourine, V.; Boiarinov, S.; Briscoe, W. J.; Cao, F.; Carman, D. S.; Chatagnon, P.; Chetry, T.; Ciullo, G.; Clark, L.; Clary, B. A.; Contalbrigo, M.; Dashyan, N.; Defurne, M.; Deur, A.; Diehl, S.; Djalali, C.; Dugger, M.; Dupre, R.; Egiyan, H.; Ehrhart, M.; El Alaoui, A.; El Fassi, L.; Eugenio, P.; Fedotov, G.; Gavalian, G.; Ghandilyan, Y.; Gilfoyle, G. P.; Giovanetti, K. L.; Girod, F. X.; Golovatch, E.; Gothe, R. W.; Griffioen, K. A.; Guo, L.; Hakobyan, H.; Harrison, N.; Hattawy, M.; Heddle, D.; Hicks, K.; Holtrop, M.; Ilieva, Y.; Ireland, D. G.; Ishkhanov, B. S.; Isupov, E. L.; Jo, H. S.; Joo, K.; Kabir, M. L.; Keller, D.; Khachatryan, M.; Khandaker, M.; Kim, A.; Kim, W.; Klein, A.; Klein, F. J.; Kubarovsky, V.; Lanza, L.; Lenisa, P.; MacGregor, I. J. D.; McKinnon, B.; Mirazita, M.; Montgomery, R. A.; Nadel-Turonski, P.; Osipenko, M.; Paremuzyan, R.; Park, K.; Pasyuk, E.; Price, J. W.; Prok, Y.; Protopopescu, D.; Ripani, M.; Riser, D.; Salgado, C.; Schumacher, R. A.; Sharabian, Y. G.; Skorodumina, Iu; Sober, D. I.; Sokhan, D.; Sparveris, N.; Taiuti, M.; Tan, J. A.; Ungaro, M.; Voskanyan, H.; Voutier, E.; Wood, M. H.; Zachariou, N.
Physical review. D, 09/2018, Letnik: 98, Številka: 5Journal Article
The exclusive reaction γp→pK+K− was studied in the photon energy range 3.0–3.8 GeV and momentum transfer range 0.6<−t<1.3 GeV2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. In this kinematic range the integrated luminosity was approximately 20 pb−1. The reaction was isolated by detecting the K+ and the proton in CLAS, and reconstructing the K− via the missing-mass technique. Moments of the dikaon decay angular distributions were extracted from the experimental data. Besides the dominant contribution of the ϕ meson in the P wave, evidence for S−P interference was found. The differential production cross sections dσ/dt for individual waves in the mass range of the ϕ resonance were extracted and compared to predictions of a Regge-inspired model. This is the first time the t-dependent cross section of the S-wave contribution to the elastic K+K− photoproduction has been measured.
