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arXiv 0810.1598hep-phhep-exhep-latnucl-th
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S波重夸克介子-介子系统的束缚态问题

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

Yan-Rui Liu, Zong-Ye Zhang

摘要:

通过求解共振群方法方程,系统地研究了手征SU(3)夸克模型中S波($\bar{Q}q$)介子和($Q\bar{q}$)介子能否形成S波束缚态.这里是$Q=c$或$b$和$q=u$、$d$或$s$。我们的初步计算不支持$I=\frac12$($\bar{Q}l$)-($Q\bar{s}$)分子($l=u,d$)的存在,而支持同配位的$B\bar{B}$、$B^*\bar{B}^*$(J=2)和$B\bar{B}^*$(C=+)分子的存在.等矢量(魅力-反魅力)和(魅力-底部)分子的存在也是不利的。因此,共振状结构$Z^+(4051)$不太可能是S波$D^*\bar{D}^*$分子。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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