Photoproduction of K+K- meson pairs on the proton

Lombardo, S.; Battaglieri, M.; Celentano, A.; D'Angelo, A.; De Vita, R.; Filippi, A.; Glazier, D. I.; Hughes, S. M.; Mathieu, V.; Rizzo, A.; Santopinto, E.; Stankovic, I.; Szczepaniak, A. P.; Watts, D.; Zana, L.; Adhikari, S.; Akbar, Z.; Avakian, H.; Ball, J.; Baltzell, N. A.; Barion, L.; Bashkanov, M.; Batourine, V.; Bedlinskiy, I.; Biselli, A. S.; Boiarinov, S.; Briscoe, W. J.; Burkert, V. D.; Cao, F.; Carman, D. S.; Chatagnon, P.; Chetry, T.; Ciullo, G.; Clark, L.; Clary, B. A.; Cole, P. L.; Contalbrigo, M.; Crede, V.; Dashyan, N.; De Sanctis, E.; 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.; Guidal, M.; Guo, L.; Hafidi, K.; Hakobyan, H.; Harrison, N.; Hattawy, M.; Heddle, D.; Hicks, K.; Holtrop, M.; Ilieva, Y.; Ireland, D. G.; Ishkhanov, B. S.; Isupov, E. L.; Jenkins, D.; H. S., Jo; Johnston, S.; Joo, K.; Kabir, M. L.; Keller, D.; Khachatryan, G.; Khachatryan, M.; Khandaker, M.; Kim, A.; Kim, W.; Klein, A.; Klein, F. J.; Kubarovsky, V.; Lanza, L.; Lenisa, P.; Livingston, K.; Macgregor, I. J. D.; Marchand, D.; Markov, N.; Mckinnon, B.; Mestayer, M. D.; Meyer, C. A.; Meziani, Z. E.; Mirazita, M.; Mokeev, V.; Montgomery, R. A.; Munoz Camacho, C.; Nadel-Turonski, P.; Niccolai, S.; Niculescu, G.; Osipenko, M.; Ostrovidov, A. I.; Paolone, M.; Paremuzyan, R.; Park, K.; Pasyuk, E.; Pogorelko, O.; Price, J. W.; Prok, Y.; Protopopescu, D.; Ripani, M.; Riser, D.; Ritchie, B. G.; Rosner, G.; Sabatie, F.; Salgado, C.; Schumacher, R. A.; Sharabian, Y. G.; Skorodumina, Iu.; Smith, G. D.; Sober, D. I.; Sokhan, D.; Sparveris, N.; Strakovsky, I. I.; Strauch, S.; Taiuti, M.; Tan, J. A.; Ungaro, M.; Voskanyan, H.; Voutier, E.; Wang, R.; Wei, X.; Wood, M. H.; Zachariou, N.; Zhang, J.; Zhao, Z. W.

doi:10.1103/PhysRevD.98.052009

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.

Photoproduction of K+K- meson pairs on the proton

Lombardo S.;Battaglieri M.;Celentano A.;D'Angelo A.;De Vita R.;Filippi A.;Glazier D. I.;Hughes S. M.;Mathieu V.;Rizzo A.;Santopinto E.;Stankovic I.;Szczepaniak A. P.;Watts D.;Zana L.;Adhikari S.;Akbar Z.;Avakian H.;Ball J.;Baltzell N. A.;Barion L.;Bashkanov M.;Batourine V.;Bedlinskiy I.;Biselli A. S.;Boiarinov S.;Briscoe W. J.;Burkert V. D.;Cao F.;Carman D. S.;Chatagnon P.;Chetry T.;Ciullo G.;Clark L.;Clary B. A.;Cole P. L.;Contalbrigo M.;Crede V.;Dashyan N.;De Sanctis E.;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.;Guidal M.;Guo L.;Hafidi K.;Hakobyan H.;Harrison N.;Hattawy M.;Heddle D.;Hicks K.;Holtrop M.;Ilieva Y.;Ireland D. G.;Ishkhanov B. S.;Isupov E. L.;Jenkins D.;Jo H. S.;Johnston S.;Joo K.;Kabir M. L.;Keller D.;Khachatryan G.;Khachatryan M.;Khandaker M.;Kim A.;Kim W.;Klein A.;Klein F. J.;Kubarovsky V.;Lanza L.;Lenisa P.;Livingston K.;Macgregor I. J. D.;Marchand D.;Markov N.;McKinnon B.;Mestayer M. D.;Meyer C. A.;Meziani Z. E.;Mirazita M.;Mokeev V.;Montgomery R. A.;Munoz Camacho C.;Nadel-Turonski P.;Niccolai S.;Niculescu G.;Osipenko M.;Ostrovidov A. I.;Paolone M.;Paremuzyan R.;Park K.;Pasyuk E.;Pogorelko O.;Price J. W.;Prok Y.;Protopopescu D.;Ripani M.;Riser D.;Ritchie B. G.;Rosner G.;Sabatie F.;Salgado C.;Schumacher R. A.;Sharabian Y. G.;Skorodumina Iu.;Smith G. D.;Sober D. I.;Sokhan D.;Sparveris N.;Strakovsky I. I.;Strauch S.;Taiuti M.;Tan J. A.;Ungaro M.;Voskanyan H.;Voutier E.;Wang R.;Wei X.;Wood M. H.;Zachariou N.;Zhang J.;Zhao Z. W.

2018-01-01

Abstract

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.