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Near-threshold Photoproduction of Phi Mesons from Deuterium

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arxiv 1011.1305 v2 pith:AYQJ6M4L submitted 2010-11-05 nucl-ex

X. Qian , W. Chen , H. Gao , K. Hicks , K. Kramer , J.M. Laget , T. Mibe , Y. Qiang
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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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keywords productioncrossdeuteriumdifferentialmeasurementmesonsnearnear-threshold
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abstract

We report the first measurement of the differential cross section on $\phi$-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 $\frac{d\sigma}{dt}$ 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 $\phi$-N bound state from heavier nuclear targets utilizing subthreshold/near-threshold production of $\phi$ mesons.

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