arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1109.3479hep-ph
收藏

弱束缚B介子分子的重夸克对称性预言

Heavy Quark Symmetry Predictions for Weakly Bound B-Meson Molecules

Thomas Mehen, Joshua W. Powell

摘要:

最近,Belle的合作发现了两个共振,Zb(10610)和Zb(10650),它们分别非常接近B \bar{B}^*和B^* \bar{B}^*的阈值。我们很自然地认为这些是底介子和反底介子的分子态。在这个假设下,我们引入了一个有效场论的Zb(10610)和Zb(10650),以及类似的未观察到的状态,预计重夸克自旋对称性的基础上。这些分子被假定是由重夸克自旋对称的短程相互作用产生的。我们利用该理论计算了B^{(*)} \bar{B}^{(*)}阈值附近的线形以及新底介子束缚态的两体衰变率。我们推导出新的重夸克自旋对称性预测的参数出现在线形以及总的和部分宽度的国家。

英文摘要:

Recently the Belle collaboration discovered two resonances, Zb(10610) and Zb(10650), that lie very close to the B\bar{B}^* and B^*\bar{B}^* thresholds, respectively. It is natural to suppose that these are molecular states of bottom and anti-bottom mesons. Under this assumption, we introduce an effective field theory for the Zb(10610) and Zb(10650), as well as similar unobserved states that are expected on the basis of heavy quark spin symmetry. The molecules are assumed to arise from short-range interactions that respect heavy quark spin symmetry. We use the theory to calculate line shapes in the vicinity of B^{(*)}\bar{B}^{(*)} thresholds as well as two-body decay rates of the new bottom meson bound states. We derive new heavy quark spin symmetry predictions for the parameters appearing in the line shapes as well as the total and partial widths of the states.

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。

↑