Near-threshold Photoproduction of Phi Mesons from Deuterium

preprint2010arXivOpen access

X. Qian W. Chen H. Gao K. Hicks K. Kramer J. M. Laget T. Mibe Y. Qiang S. Stepanyan D. J. Tedeschi W. Xu K. P. Adhikari M. Amaryan M. Anghinolfi J. Ball M. Battaglieri V. Batourine I. Bedlinskiy M. Bellis A. S. Biselli C. Bookwalter D. Branford W. J. Briscoe W. K. Brooks V. D. Burkert S. L. Careccia D. S. Carman P. L. Cole P. Collins V. Crede A. D'Angelo A. Daniel N. Dashyan R. De Vita E. De Sanctis A. Deur B. Dey S. Dhamija C. Djalali D. Doughty R. Dupre H. Egiyan A. El Alaoui P. Eugenio S. Fegan M. Y. Gabrielyan N. Gevorgyan G. P. Gilfoyle K. L. Giovanetti F. X. Girod J. T. Goetz W. Gohn R. W. Gothe L. Graham K. A. Griffioen M. Guidal L. Guo K. Hafidi H. Hakobyan C. Hanretty N. Hassall M. Holtrop Y. Ilieva D. G. Ireland S. S. Jawalkar H. S. Jo K. Joo D. Keller M. Khandaker P. Khetarpal A. Kim W. Kim A. Klein F. J. Klein P. Konczykowski V. Kubarovsky S. V. Kuleshov V. Kuznetsov K. Livingston D. Martinez M. Mayer J. McAndrew M. E. McCracken B. McKinnon C. A. Meyer K. Mikhailov T. Mineeva M. Mirazita V. Mokeev B. Moreno K. Moriya B. Morrison H. Moutarde E. Munevar P. Nadel-Turonski A. Ni S. Niccolai I. Niculescu M. R. Niroula M. Osipenko A. I. Ostrovidov R. Paremuzyan K. Park S. Park S. Anefalos Pereira S. Pisano O. Pogorelko S. Pozdniakov J. W. Price S. Procureur D. Protopopescu G. Ricco M. Ripani B. G. Ritchie G. Rosner P. Rossi F. Sabatié M. S. Saini C. Salgado D. Schott R. A. Schumacher E. Seder H. Seraydaryan Y. G. Sharabian E. S. Smith G. D. Smith D. I. Sober D. Sokhan S. S. Stepanyan P. Stoler I. I. Strakovsky S. Strauch M. Taiuti C. E. Taylor S. Tkachenko M. Ungaro B . Vernarsky M. F. Vineyard E. Voutier L. B. Weinstein D. P. Weygand M. H. Wood N. Zachariou L. Zana J. Zhang B. Zhao Z. W. Zhao

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We report the first measurement of the differential cross section on $ϕ$ -meson photoproduction from deuterium near the production threshold for a proton using the CLAS detector and a tagged-photon beam in Hall B at Jefferson Lab. The measurement was carried out by a triple coincidence detection of a proton, $K^+$ and $K^-$ near the theoretical production threshold of 1.57 GeV. The extracted differential cross sections $\frac{dσ}{dt}$ for the initial photon energy from 1.65-1.75 GeV are consistent with predictions based on a quasifree mechanism. This experiment establishes a baseline for a future experimental search for an exotic $ϕ$ -N bound state from heavier nuclear targets utilizing subthreshold/near-threshold production of $ϕ$ mesons.

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Near-threshold Photoproduction of Phi Mesons from Deuterium

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