Friday, March 30, 2007.

Phase Shift Analysis of K+ Nucleon Scattering

3:00- 4:00 pm , 104 VanderWerf

Roberto Arceo-Reyes

New Mexico State University

Abstract:

We have performed a partial-wave analysis ofK+-nucleon scattering in the momentum range from 0 to 1.5 GeV/c addressing the uncertainties of the results and comparing them with several previous analyses. It is found that the treatment of the reaction threshold behavior is particularly important. Wefind a T=0 scattering length which is not consistent with zero, as has been claimed by other analyses. The T=0 phase shifts for l>0 are consistent with a pure spin-orbit potential. Some indications for the production of aT=0 pent a quark with spin-parity D5/2+ are discussed.