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Separated Structure Functions for Exclusive $K^+\Lambda$ and $K^+\Sigma^0$ Electroproduction at 5.5 GeV with CLAS

D.S. Carman K. Park B.A. Raue K.P. Adhikari D. Adikaram M. Aghasyan M.J. Amaryan M.D. Anderson S. Anefalos Pereira M. Anghinolfi H. Avakian H. Baghdasaryan J. Ball 1 N.A. Baltzell M. Battaglieri V. Batourine I. Bedlinskiy A.S. Biselli J. Bono S. Boiarinov W.J. Briscoe W.K. Brooks V.D. Burkert A. Celentano S. Chandavar G. Charles 1 P.L. Cole M. Contalbrigo O. Cortes V. Crede A. d'Angelo N. Dashyan R. de Vita E. de Sanctis A. Deur C. Djalali D. Doughty R. Dupre A. El Alaoui L. El Fassi P. Eugenio G. Fedotov S. Fegan R. Fersch J.A. Fleming A. Fradi M.Y. Gabrielyan N. Gevorgyan K.L. Giovanetti F.X. Girod J.T. Goetz W. Gohn R.W. Gothe K.A. Griffioen B. Guegan M. Guidal L. Guo K. Hafidi H. Hakobyan C. Hanretty N. Harrison D. Heddle K. Hicks D. Ho M. Holtrop Y. Ilieva D.G. Ireland B.S. Ishkhanov E.L. Isupov H.S. Jo K. Joo D. Keller M. Khandaker P. Khetarpal A. Kim W. Kim A. Klein F.J. Klein S. Koirala A. Kubarovsky V. Kubarovsky S.V. Kuleshov N.D. Kvaltine S. Lewis K. Livingston H.Y. Lu I.J.D. Macgregor Y. Mao David Martinez M. Mayer B. Mckinnon M.D. Mestayer C.A. Meyer T. Mineeva M. Mirazita V. Mokeev R.A. Montgomery H. Moutarde 1 E. Munevar C. Munoz Camacho P. Nadel-Turonski R. Nasseripour C.S. Nepali S. Niccolai G. Niculescu I. Niculescu M. Osipenko A.I. Ostrovidov L.L. Pappalardo R. Paremuzyan S. Park E. Pasyuk E. Phelps J.J. Phillips S. Pisano O. Pogorelko S. Pozdniakov J.W. Price S. Procureur 1 Y. Prok D. Protopopescu A.J.R. Puckett G. Ricco D. Rimal M. Ripani G. Rosner P. Rossi F. Sabatié 1 M.S. Saini C. Salgado N.A. Saylor D. Schott R.A. Schumacher E. Seder H. Seraydaryan Y.G. Sharabian G.D. Smith D.I. Sober D. Sokhan S.S. Stepanyan S. Stepanyan P. Stoler I.I. Strakovsky S. Strauch M. Taiuti W. Tang C.E. Taylor Y. Tian S. Tkachenko A. Trivedi M. Ungaro B. Vernarsky H. Voskanyan E. Voutier 2 N.K. Walford L.B. Weinstein M.H. Wood N. Zachariou L. Zana J. Zhang Z.W. Zhao I. Zonta
Abstract : We report measurements of the exclusive electroproduction of $K^+\Lambda$ and $K^+\Sigma^0$ final states from an unpolarized proton target using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The separated structure functions $\sigma_U$, $\sigma_{LT}$, $\sigma_{TT}$, and $\sigma_{LT'}$ were extracted from the $\Phi$-dependent differential cross sections acquired with a longitudinally polarized 5.499 GeV electron beam. The data span a broad range of momentum transfers $Q^2$ from 1.4 to 3.9 GeV$^2$, invariant energy $W$ from threshold to 2.6 GeV, and nearly the full center-of-mass angular range of the kaon. The separated structure functions provide an unprecedented data sample, which in conjunction with other meson photo- and electroproduction data, will help to constrain the higher-level analyses being performed to search for missing baryon resonances.
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Submitted on : Friday, December 7, 2012 - 9:27:38 AM
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D.S. Carman, K. Park, B.A. Raue, K.P. Adhikari, D. Adikaram, et al.. Separated Structure Functions for Exclusive $K^+\Lambda$ and $K^+\Sigma^0$ Electroproduction at 5.5 GeV with CLAS. Physical Review C, American Physical Society, 2013, 87, pp.025204. ⟨10.1103/PhysRevC.87.025204⟩. ⟨in2p3-00762344⟩

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