Skip to Main content Skip to Navigation
Journal articles

Separated Structure Functions for the Exclusive Electroproduction of $K^+\Lambda$ and $K^+\Sigma^0$ Final States

P. Ambrozewicz D. S. Carman R. J. Feuerbach M. D. Mestayer B. A. Raue R. A. Schumacher A. Tkabladze M.J. Amarian M. Anghinolfi B. Asavapibhop G. Asryan H. Avakian H. Bagdasaryan N. Baillie J.P. Ball N.A. Baltzell S. Barrow V. Batourine M. Battaglieri K. Beard I. Bedlinskiy M. Bektasoglu M. Bellis N. Benmouna B.L. Berman N. Bianchi A.S. Biselli B.E. Bonner S. Bouchigny 1, 2 S. Boiarinov R. Bradford D. Branford W.J. Briscoe W.K. Brooks S. Bultmann V.D. Burkert C. Butuceanu J.R. Calarco S.L. Careccia C. Cetina S. Chen P.L. Cole P. Collins P. Coltharp D. Cords P. Corvisiero D. Crabb V. Crede J.P. Cummings N. Dashyan R. de Masi 3 R. de Vita E. de Sanctis P.V. Degtyarenko L. Dennis A. Deur K.S. Dhuga R. Dickson C. Djalali G.E. Dodge J. Donnelly D. Doughty P. Dragovitsch M. Dugger S. Dytman O.P. Dzyubak H. Egiyan K.S. Egiyan L. El Fassi L. Elouadrhiri A. Empl P. Eugenio L. Farhi 3 R. Fatemi G. Fedotov G. Feldman T.A. Forest V. Frolov H. Funsten M. Garcon 3 G. Gavalian G.P. Gilfoyle K.L. Giovanetti P. Girard F.X. Girod 3 J.T. Goetz A. Gonenc R.W. Gothe K.A. Griffioen M. Guidal 1 M. Guillo N. Guler L. Guo V. Gyurjyan K. Hafidi H. Hakobyan J. Hardie D. Heddle F.W. Hersman K. Hicks I. Hleiqawi M. Holtrop J. Hu C.E. Hyde-Wright Y. Ilieva D.G. Ireland B.S. Ishkhanov E.L. Isupov M.M. Ito D. Jenkins H.S. Jo 1 K. Joo H.G. Juengst N. Kalantarians J.D. Kellie M. Khandaker K.Y. Kim K. Kim W. Kim A. Klein F.J. Klein M. Klusman M. Kossov L.H. Kramer V. Kubarovsky J. Kuhn S.E. Kuhn S.V. Kuleshov J. Lachniet J.M. Laget J. Langheinrich D. Lawrence K. Livingston H.Y. Lu K. Lukashin M. Maccormick 1 J.J. Manak N. Markov S. Mcaleer B. Mckinnon J.W.C. Mcnabb B.A. Mecking C.A. Meyer T. Mibe K. Mikhailov R. Minehart M. Mirazita R. Miskimen V. Mokeev K. Moriya S.A. Morrow M. Moteabbed V. Muccifora J. Mueller G.S. Mutchler P. Nadel-Turonski J. Napolitano R. Nasseripour S. Niccolai 1 G. Niculescu I. Niculescu B.B. Niczyporuk M.R. Niroula R.A. Niyazov M. Nozar G.V. O'Rielly M. Osipenko A.I. Ostrovidov K. Park E. Pasyuk C. Paterson S.A. Philips J. Pierce N. Pivnyuk D. Pocanic O. Pogorelko E. Polli S. Pozdniakov B.M. Preedom J.W. Price Y. Prok D. Protopopescu L.M. Qin G. Riccardi G. Ricco M. Ripani B.G. Ritchie F. Ronchetti G. Rosner P. Rossi D. Rowntree P.D. Rubin F. Sabatie J. Salamanca C. Salgado J.P. Santoro V. Sapunenko V.S. Serov A. Shafi Y.G. Sharabian N.V. Shvedunov S. Simionatto A.V. Skabelin E.S. Smith L.C. Smith D.I. Sober D. Sokhan A. Stavinsky S.S. Stepanyan S. Stepanyan B.E. Stokes P. Stoler I.I. Strakovsky S. Strauch M. Taiuti S. Taylor D.J. Tedeschi R. Thompson S. Tkachenko C. Tur M. Ungaro M.F. Vineyard A.V. Vlassov K. Wang D.P. Watts L.B. Weinstein D.P. Weygand M. Williams E. Wolin M.H. Wood A. Yegneswaran J. Yun L. Zana J. Zhang B. Zhao Z.W. Zhao
Abstract : We report measurements of the exclusive electroproduction of $K^+\Lambda$ and $K^+\Sigma^0$ final states from a proton target using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The separated structure functions $\sigma_T$, $\sigma_L$, $\sigma_{TT}$, and $\sigma_{LT}$ were extracted from the $\Phi$- and $\epsilon$-dependent differential cross sections taken with electron beam energies of 2.567, 4.056, and 4.247 GeV. This analysis represents the first $\sigma_L/\sigma_T$ separation with the CLAS detector, and the first measurement of the kaon electroproduction structure functions away from parallel kinematics. The data span a broad range of momentum transfers from $0.5\leq Q^2\leq 2.8$ GeV$^2$ and invariant energy from $1.6\leq W\leq 2.4$ GeV, while spanning nearly the full center-of-mass angular range of the kaon. The separated structure functions reveal clear differences between the production dynamics for the $\Lambda$ and $\Sigma^0$ hyperons. These results provide an unprecedented data sample with which to constrain current and future models for the associated production of strangeness, which will allow for a better understanding of the underlying resonant and non-resonant contributions to hyperon production.
Document type :
Journal articles
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00126301
Contributor : Dominique Girod <>
Submitted on : Wednesday, January 24, 2007 - 3:48:55 PM
Last modification on : Wednesday, September 16, 2020 - 4:07:55 PM

Links full text

Identifiers

Collections

Citation

P. Ambrozewicz, D. S. Carman, R. J. Feuerbach, M. D. Mestayer, B. A. Raue, et al.. Separated Structure Functions for the Exclusive Electroproduction of $K^+\Lambda$ and $K^+\Sigma^0$ Final States. Physical Review C, American Physical Society, 2007, 75, pp.045203. ⟨10.1103/PhysRevC.75.045203⟩. ⟨in2p3-00126301⟩

Share

Metrics

Record views

141