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arXiv 1801.09110hep-phhep-exhep-lat
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手征极限下N2LO的0+和1+重轻奇异介子

0+ and 1+ heavy-light exotic mesons at N2LO in the chiral limit

R. M Albuquerque, S. Narison, F. Fanomezana, A. Rabemananjara, D. Rabetiarivony, G. Randriamanatrika

摘要:

利用QCD谱求和规则(QSSR)和分子流和四夸克流的因式分解性质,计算了PT QCD中0+、1+分子和四夸克在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六维。在拉普拉斯求和规则方法(LSR)和MS方案中,我们将我们的结果总结在表2中,这些结果在误差范围内与一些观察到的XZ类分子或/和四夸克相一致。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 and four-quark currents to estimate the masses and couplings of the 0+ and 1+ molecules and four-quark at N2LO of PT QCD. We include in the OPE the contributions of non-perturbative condensates up to dimension-six. Within the Laplace sum rules approach (LSR) and in the MS-scheme, we summarize our results in Table 2, which agree within the errors with some of the observed XZ-like molecules or/and four-quark. 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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