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

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

2007-11-24

arxiv.org/abs/0711.3813v2

Eur.Phys.J.C54:253-258,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 3 figures, 2 tables. The title changed. More discussion added

Scientific paper

10.1140/epjc/s10052-008-0527-4

Considering two molecular state assumptions, i.e. S-wave $\bar{\Lambda}-K^-$ and S-wave $\bar{\Sigma}^0-K^-$ molecular states, we study the possible decays of $\bar N_X(1625)$ that include $\bar N_X(1625)\to K^{-}\bar{\Lambda}, \pi^{0}\bar{p}, \eta\bar{p}, \pi^{-}\bar{n}$. Our results indicate: (1) if $\bar N_{X}(1625)$ is $\bar{\Lambda}-K^-$ molecular state, $K^{-}\bar{\Lambda}$ is the main decay modes of $\bar N_{X}(1625)$, and the branching ratios of the rest decay modes are tiny; (2) if $\bar N_{X}(1625)$ is $\bar{\Sigma}^0-K^-$ molecular state, the branching ratio of $\bar N_{X}(1625)\to K^{-}\bar{\Lambda}$ is one or two order smaller than that of $\bar N_{X}(1625)\to \pi^{0}\bar{p}, \eta\bar{p}, \pi^{-}\bar{n}$. Thus the search for $\bar N_X(1625)\to \pi^{0}\bar{p}, \eta\bar{p}, \pi^{-}\bar{n}$ will be helpful to shed light on the nature of $\bar N_X(1625)$.

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