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arXiv 1209.0144hep-ph
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具有隐藏魅力和阈值附近底部的奇异介子

Exotic mesons with hidden charm and bottom near thresholds

Shunsuke Ohkoda, Y. Yamaguchi, S. Yasui, K. Sudoh, A. Hosaka

摘要:

我们研究了重介子阈值附近的重强子谱。我们采用重赝标介子P和重矢量介子P* 作为有效自由度,并考虑它们之间的介子交换势。研究了P介子和P* 介子在总角动量J <= 2的范围内可能构成的所有复合态。我们考虑具有奇异J^{PC}量子数的等单重态和等三重态作为奇异态。我们数值求解了每个态的通道耦合薛定谔方程。我们发现,当I^G(J^{PC})= 1^+(1^{+-})时,B(*)barB(*)分子态对应于孪生共振态Zb(10610)和Zb(10650)的质量。我们预测了其他通道中几种可能的B(*)barB(*)束缚态和/或共振态。另一方面,不存在量子数为奇异的B(*)barB(*)束缚态和/或共振态。

英文摘要:

We study heavy hadron spectroscopy near heavy meson thresholds. We employ heavy pseudoscalar meson P and heavy vector meson P* as effective degrees of freedom and consider meson exchange potentials between them. All possible composite states which can be constructed from the P and P* mesons are studied up to the total angular momentum J <= 2. We consider, as exotic states, isosinglet states with exotic J^{PC} quantum numbers and isotriplet states. We solve numerically the Schrödinger equation with channel-couplings for each state. We found B(*)barB(*) molecule states for I^G(J^{PC}) = 1^+(1^{+-}) correspond to the masses of twin resonances Zb(10610) and Zb(10650). We predict several possible B(*)barB(*) bound and/or resonant states in other channels. On the other hand, there are no B(*)barB(*) bound and/or resonant states whose quantum numbers are exotic.

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