Eur. Phys. J. C (2008) 54: 253-258
https://doi.org/10.1140/epjc/s10052-008-0527-4

Regular Article - Theoretical Physics

What can we learn from the decay of N_X(1625) in the molecule picture?

Department of Physics, Peking University, Beijing, 100871, P.R. China

^* e-mail: xiangliu@pku.edu.cn

Received: 23 November 2007
Revised: 12 December 2007
Published online: 31 January 2008

Abstract

Considering two assumptions on the molecular state, i.e. the S-wave Λ̄–K^- and S-wave Σ̄⁰–K^- molecular states, we study the possible decays of N̄_X(1625) that include N̄_X(1625)→K^-Λ̄,π⁰p̄,ηp̄,π^-n̄. Our results indicate that (1) if N̄_X(1625) is the Λ̄–K^- molecular state, K^-Λ̄ is the main decay mode of N̄_X(1625), and the branching ratios of the rest decay modes are tiny; (2) if N̄_X(1625) is the Σ̄⁰–K^- molecular state, the branching ratio of N̄_X(1625)→K^-Λ̄ is one or two orders smaller than that of N̄_X(1625)→π⁰p̄,ηp̄,π^-n̄. Thus the search for N̄_X(1625)→π⁰p̄,ηp̄,π^-n̄ will be helpful to shed light on the nature of N̄_X(1625).