Ξ(2030) and Ξ(2120) as K^*Σ molecular states

2018/06/14 by Huang, Yin, Wang, Rong, He, Jun +2
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.1806.05422

Abstract

In this work, the molecular states from the K^*Σinteraction are studied in a quasipotential Bethe-Salpeter equation approach with the one-boson-exchange potentials. We consider the exchanges of vector (ρ,ωand ϕ) mesons and pseudoscalar (πand η) mesons to describe the K^*Σinteraction with the coupling constants determined by the SU(3) symmetry, The poles of the scattering amplitude are searched for to find the molecular states dynamically generated from the K^*Σinteraction. A bound state with quantum number I(J^p)=1/2(5/2⁺) is produced, which can be associated to the Ξ(2030) baryon. Other bound states with J≤5/2 are also searched for and it is found that there exist bound states with quantum numbers I(J^P)=1/2(1/2^-), 1/2(3/2^-), and 1/2(3/2⁺). The Ξ(2120) may be a candidate for one of these three bound states. In addition, we also find two bound states with isospin 3/2 and spin parities 1/2^- and 1/2⁺.

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