Cross sections and Rosenbluth separations in H-1(e, e ' K[superscript +])Lambda up to Q[superscript 2]=2.35 GeV[superscript 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, Debarchana; 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.

Author(s)

Zheng, Xinying Grace; Dutta, Debarchana; Fissum, K. G.; Gayou, Olivier; Sirca, S.; ... Show more

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Alternative title

Cross sections and Rosenbluth separations in H-1(e, e ' K+)Lambda up to Q(2)=2.35 GeV2

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Abstract

The kaon electroproduction reaction 1H(e,e′K+)Lambda was studied as a function of the virtual-photon four-momentum, Q[superscript 2], 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 twenty-one kinematics corresponding to Q[superscript 2] of 1.90 and 2.35 GeV[superscript 2], 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.

Date issued

2010-05

URI

http://hdl.handle.net/1721.1/58720

Department

Massachusetts Institute of Technology. Department of Physics

Journal

Physical Review C

Publisher

American Physical Society

Citation

Jefferson Lab Hall A Collaboration et al. “Cross sections and Rosenbluth separations in H-1(e,e'K[superscript +])Lambda up to Q[superscript 2]=2.35 GeV[superscript 2].” Physical Review C 81.5 (2010): 052201. © 2010 The American Physical Society.

Version: Final published version

ISSN

0556-2813

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