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arXiv 1505.03360hep-lathep-ph
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HQET中1/m量级的B介子谱

B-meson spectroscopy in HQET at order 1/m

Fabio Bernardoni, Benoît Blossier, John Bulava, Michele Della Morte, Patrick Fritzsch, Nicolas Garron, Antoine Gérardin, Jochen Heitger, Georg von Hippel, Hubert Simma

摘要:

本文在重夸克有效理论的框架下,在1/m的非微扰条件下,对B谱进行了研究。我们对三种不同格点间距和不同质量的Nf=2格点规范场系综进行了分析。我们得到了与实验值符合得很好的Bs介子质量和超精细分裂,并检验了质量差m_{Bs} -m_B,作为对我们以前估计的b夸克质量的进一步检验.我们还报道了B和Bs系统中第一激发态和基态之间的质量分裂。

英文摘要:

We present a study of the B spectrum performed in the framework of Heavy Quark Effective Theory expanded to next-to-leading order in 1/m and non-perturbative in the strong coupling. Our analyses have been performed on Nf=2 lattice gauge field ensembles corresponding to three different lattice spacings and a wide range of pion masses. We obtain the Bs-meson mass and hyperfine splittings of the B- and Bs-mesons that are in good agreement with the experimental values and examine the mass difference m_{Bs}-m_B as a further cross-check of our previous estimate of the b-quark mass. We also report on the mass splitting between the first excited state and the ground state in the B and Bs systems.

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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