The bound state problem of S-wave heavy quark meson-aitimeson systems

Details The bound state problem of S-wave heavy quark meson-aitimeson systems The bound state problem of S-wave heavy quark meson-aitimeson systems

2008-10-09

arxiv.org/abs/0810.1598v2

Phys.Rev.C80:015208,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 7 tables, accepted by Phys. Rev. C

Scientific paper

10.1103/PhysRevC.80.015208

We investigated systematically whether the S-wave ($\bar{Q}q$) meson and the ($Q\bar{q}$) meson may form S-wave bound states in a chiral SU(3) quark model by solving the resonating group method equation. Here $Q=c$ or $b$ and $q=u$, $d$ or $s$. Our preliminary calculation disfavors the existence of $I=\frac12$ ($\bar{Q}l$)-($Q\bar{s}$) molecules ($l=u,d$) while favors the existence of isoscalar $B\bar{B}$, $B^*\bar{B}^*$ (J=2) and $B\bar{B}^*$ (C=+) molecules. The existence of isovector (charm-anticharm) and (charm-bottom) molecules is also disfavored. Therefore the resonance-like structure $Z^+(4051)$ is unlikely to be an S-wave $D^*\bar{D}^*$ molecule.

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