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arXiv 1409.8591hep-ph
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来自QSSR的N2LO处的$ \bar D^*D$和$\bar B^*B~(1^{++})$分子

$ \bar D^*D$ and $\bar B^*B~(1^{++})$ molecules at N2LO from QSSR

F. Fanomezana, S. Narison, A. Rabemananjara

摘要:

我们利用QCD谱求和规则(QSSR)和分子流的因式分解性质估计了$\bar D^*D$和$\bar B^*B~(1^{++})$分子在PT QCD的N2 LO处的质量和耦合.我们包括在OPE的贡献的非微扰凝聚到8维。用拉普拉斯求和规则方法(LSR)和$\overline{MS}$方案,我们得到了$M_{D^*D}=3738(152)$ MeV,它与新发现的$Z_c$(3900)在误差范围内是一致的.对于底部沟道,我们发现$M_{B^*B}=10687(232)$ MeV与观测到的$Z_b$(10610)非常一致。这些状态的电流的耦合也被提取。我们的结果是现有文献中LO结果的改进。

英文摘要:

We use QCD spectral sum rules (QSSR) and the factorization properties of molecule currents to estimate the masses and couplings of the $\bar D^*D$ and $\bar B^*B~(1^{++})$ molecules at N2LO of PT QCD. We include in the OPE the contributions of non-perturbative condensates up to dimension-eight. With the Laplace sum rules approach (LSR) and in the $\overline{MS}$-scheme, we obtain $M_{D^*D}=3738(152)$ MeV, which agrees within the errors with the newly discovered $Z_c$(3900). For the bottom channel, we find $M_{B^*B}=10687(232)$ MeV in good agreement with the observed $Z_b$(10610). Couplings of these states to the currents are also extracted. Our results are improvements of the LO ones in the existing literature.

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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