Evidence of Pentaquark States from K+ N Scattering Data?

Details Evidence of Pentaquark States from K+ N Scattering Data? Evidence of Pentaquark States from K+ N Scattering Data?

2004-05-04

arxiv.org/abs/nucl-th/0405008v1

Mod.Phys.Lett. A19 (2004) 2001-2008

Physics

Nuclear Physics

Nuclear Theory

10 pages, 4 figures

Scientific paper

10.1142/S0217732304014173

Motivated by the recent experimental evidence of the exotic B = S = +1 baryonic state Theta(1540), we examine the older existing data on K+ N elastic scattering through the time delay method. We find positive peaks in time delay around 1.545 and 1.6 GeV in the D03 and P01 partial waves of K+ N scattering respectively, in agreement with experiments. We also find an indication of the J=3/2 Theta* spin-orbit partner to the Theta, in the P03 partial wave at 1.6 GeV. We discuss the pros and contras of these findings in support of the interpretation of these peaks as possible exotics.

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