Cross sections and Rosenbluth separations in H1 ( e,e′K+ ) Λ up to Q2=2.35  GeV 2

Coman, M.; Markowitz, P.; Aniol, K. A.; Baker, K.; Boeglin, W. U.; Breuer, H.; Bydžovský, P.; Camsonne, A.; Cha, J.; Chang, C. C.; Chant, N.; Chen, J. -P.; Chudakov, E. A.; Cisbani, E.; Cole, L.; Cusanno, F.; de Jager, C. W.; De Leo, R.; Deur, A. P.; Dieterich, S.; Dohrmann, F.; Dutta, D.; Ent, R.; Filoti, O.; Fissum, K.; Frullani, S.; Garibaldi, F.; Gayou, O.; Gilman, F.; Gomez, J.; Gueye, P.; Hansen, J. O.; Higinbotham, D. W.; Hinton, W.; Horn, T.; Hu, B.; Huber, G. M.; Iodice, M.; Jackson, C.; Jiang, X.; Jones, M.; Kanda, K.; Keppel, C.; King, P.; Klein, F.; Kozlov, K.; Kramer, K.; Kramer, L.; Lagamba, L.; LeRose, J. J.; Liyanage, N.; Margaziotis, D. J.; Marrone, S.; McCormick, K.; Michaels, R. W.; Mitchell, J.; Miyoshi, T.; Nanda, S.; Palomba, M.; Pattichio, V.; Perdrisat, C. F.; Piasetzky, E.; Punjabi, V. A.; Raue, B.; Reinhold, J.; Reitz, B.; Roche, R. E.; Roos, P.; Saha, A.; Sarty, A. J.; Sato, Y.; Širca, S.; Sotona, M.; Tang, L.; Ueno, H.; Ulmer, P. E.; Urciuoli, G. M.; Uzzle, A.; Vacheret, A.; Wang, K.; Wijesooriya, K.; Wojtsekhowski, B.; Wood, S.; Yaron, I.; Zheng, X.; Zhu, L.

doi:10.1103/PhysRevC.81.052201

Title: Cross sections and Rosenbluth separations in ${}^{1}H$ ( $e, e^{'} K^{+}$ ) $Λ$ up to $Q^{2} = 2.35$ GeV $^{2}$

Journal Article · Sat May 01 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.81.052201· OSTI ID:982199

Coman, M.; Markowitz, P.; Aniol, K. A.; Baker, K.; Boeglin, W. U.; Breuer, H.; Bydžovský, P.; Camsonne, A.; Cha, J.; Chang, C. C.; Chant, N.; Chen, J. -P.; Chudakov, E. A.; Cisbani, E.; Cole, L.; Cusanno, F.; de Jager, C. W.; De Leo, R.; Deur, A. P.; Dieterich, S. more »

The kaon electroproduction reaction 1H(e,e'K+)Lambda was studied as a function of the virtual-photon four-momentum, Q2, total energy, W, and momentum transfer, t, for different values of the virtual- photon polarization parameter. Data were taken at electron beam energies ranging from 3.40 to 5.75 GeV. The center of mass cross section was determined for 21 kinematics corresponding to Q2 of 1.90 and 2.35 GeV2 and the longitudinal, sigmaL, and transverse, sigmaT , cross sections were separated using the Rosenbluth technique at fixed W and t. The separated cross sections reveal a flat energy dependence at forward kaon angles not satisfactorily described by existing electroproduction models. Influence of the kaon pole on the cross sections was investigated by adopting an off-shell form factor in the Regge model which better describes the observed energy dependence of sigmaT and sigmaL.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: Jefferson Lab Hall A Collaboration

DOE Contract Number:: AC05-06OR23177

OSTI ID:: 982199

Report Number(s):: JLAB-PHY-09-1108; DOE/OR/23177-1048; PRVCAN; TRN: US1004132

Journal Information:: Physical Review. C, Nuclear Physics, Vol. 81, Issue 5; ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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Title: Cross sections and Rosenbluth separations in H 1 ( e , e ′ K + ) Λ up to Q 2 = 2 . 35 GeV 2

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Title: Cross sections and Rosenbluth separations in ${}^{1}H$ ( $e, e^{'} K^{+}$ ) $Λ$ up to $Q^{2} = 2.35$ GeV $^{2}$