Cross sections and Rosenbluth separations in 1H(e, e'K+)Lambda up to Q2=2.35 GeV2
Abstract
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.
Cite
@article{arxiv.0911.3943,
title = {Cross sections and Rosenbluth separations in 1H(e, e'K+)Lambda up to Q2=2.35 GeV2},
author = {M. Coman and P. Markowitz and K. A. Aniol and K. Baker and W. U. Boeglin and H. Breuer and P. Bydzovsky and A. Camsonne and J. Cha and C. C. Chang and N. Chant and J. -P. Chen and E. A. Chudakov and E. Cisbani and L. Cole and F. Cusanno and C. W. de Jager and R. De Leo and A. P. Deur and S. Dieterich and F. Dohrmann and D. Dutta and R. Ent and O. Filoti and K. Fissum and S. Frullani and F. Garibaldi and O. Gayou and F. Gilman and J. Gomez and P. Gueye and J. O. Hansen and D. W. Higinbotham and W. Hinton and T. Horn and B. Hu and G. M. Huber and M. Iodice and C. Jackson and X. Jiang and M. Jones and K. Kanda and C. Keppel and P. King and F. Klein and K. Kozlov and K. Kramer and L. Kramer and L. Lagamba and J. J. LeRose and N. Liyanage and D. J. Margaziotis and S. Marrone and K. McCormick and R. W. Michaels and J. Mitchell and T. Miyoshi and S. Nanda and M. Palomba and V. Pattichio and C. F. Perdrisat and E. Piasetzky and V. A. Punjabi and B. Raue and J. Reinhold and B. Reitz and R. E. Roche and P. Roos and A. Saha and A. J. Sarty and Y. Sato and S. Sirca and M. Sotona and L. Tang and H. Ueno and P. E. Ulmer and G. M. Urciuoli and A. Uzzle and A. Vacheret and K. Wang and K. Wijesooriya and B. Wojtsekhowski and S. Wood and I. Yaron and X. Zheng and L. Zhu},
journal= {arXiv preprint arXiv:0911.3943},
year = {2014}
}
Comments
5 pages, 4 figures. Submitted to Physical Review C, Rapid Communications