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

0347096 - ÚJF 2011 RIV US eng J - Článek v odborném periodiku
Coman, M. - Markowitz, P. - Aniol, K.A. - Baker, K. - Boeglin, W. U. - Breuer, H. - Bydžovský, Petr - 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. - Sirca, S. - Sotona, Miloslav - 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.
Cross sections and Rosenbluth separations in H-1(e, e ' K+)Lambda up to Q(2)=2.35 GeV2.
Physical Review. C. Roč. 81, č. 5 (2010), 052201/1-052201/5. ISSN 0556-2813
Grant CEP: GA ČR GA202/08/0984
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: ELECTROMAGNETIC PRODUCTION * HALL-A * PHOTOPRODUCTION
Kód oboru RIV: BE - Teoretická fyzika
Impakt faktor: 3.416, rok: 2010

The kaon electroproduction reaction H-1(e, e ' K+)Lambda was studied as a function of the virtual-photon four-momentum, Q(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(2) of 1.90 and 2.35 GeV2, and the longitudinal, sigma(L), and transverse, sigma(T), 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 sigma(T) and sigma(L).
Trvalý link: http://hdl.handle.net/11104/0187950