Evidence of the non-strange partner of pentaquark from the elementary $K^{+}\Lambda$ photoproduction

Abstract

The existence of the $J^p=1/2^{+}$ narrow resonance predicted by the chiral soliton model has been investigated by utilizing the new kaon photoproduction data. For this purpose, we have constructed two phenomenological models, which are able to describe kaon photoproduction from threshold up to W=1730 MeV. By varying the resonance mass, width, and $K\Lambda$ branching ratio in this energy range we found that the most convincing mass of this resonance is 1650 MeV. Using this result we estimate the masses of other antidecuplet family members.

4 pages, 4 figures, prepared for the Fifth Asia-Pacific Conference on Few-Body Problems in Physics 2011 (APFB2011), Seoul, Korea, August 22-26, 2011

References in corpus (8)

• Unitary Isobar Model - MAID2007
• Extended Partial-Wave Analysis of piN Scattering Data
• Differential cross section and recoil polarization measurements for the gamma p to K+ Lambda reaction using CLAS at Jefferson Lab
• Evidence for a narrow structure at W~1.68 GeV in eta photoproduction on the neutron
• Kaon photoproduction in a multipole approach
• On the cross section ratio sigma_n/sigma_p in eta photoproduction
• Electromagnetic production of kaon near threshold
• Evidence for the J^p=1/2^+ narrow state at 1650 MeV in the photoproduction of KLambda