Cross sections and Rosenbluth separations in H1(e,eK +)Λ up to Q2=2.35GeV2

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

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Abstract

The kaon electroproduction reaction H1(e,eK +)Λ 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 5.75GeV. The center of mass cross section was determined for twenty-one kinematics corresponding to Q2 of 1.90 and 2.35GeV2, and the longitudinal, σL, and transverse, σT, 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 σT and σL.

Original languageEnglish (US)
Article number052201
JournalPhysical Review C - Nuclear Physics
Volume81
Issue number5
DOIs
StatePublished - May 24 2010
Externally publishedYes

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Coman, M., Markowitz, P., Aniol, K. A., Baker, K., Boeglin, W. U., Breuer, H., Bydẑovský, 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., ... Zhu, L. (2010). Cross sections and Rosenbluth separations in H1(e,eK +)Λ up to Q2=2.35GeV2. Physical Review C - Nuclear Physics, 81(5), [052201]. https://doi.org/10.1103/PhysRevC.81.052201