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arXiv 1008.0653hep-lathep-exhep-ph
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扭曲质量格点量子色动力学中静态轻重子的能谱

The spectrum of static-light baryons in twisted mass lattice QCD

Marc Wagner, Christian Wiese

摘要:

用Wilson扭曲质量格点量子色动力学计算了N_f = 2味海夸克的静轻重子谱。作为轻价夸克,我们考虑夸克,它们与海夸克具有相同的质量,相应的π介子质量在340 MeV < m_PS < 525 MeV的范围内,以及部分猝灭夸克,它们具有物理s夸克的质量。我们提取了具有同位旋I = 0,1/2,1,奇异度S = 0,-1,-2,光自由度角动量j = 0,1,宇称P = +,-的态的质量。我们提出了一个初步的外推在轻的u/d和重的b夸克质量的物理点的内插,并与现有的实验结果进行比较。

英文摘要:

We compute the static-light baryon spectrum with N_f = 2 flavors of sea quarks using Wilson twisted mass lattice QCD. As light valence quarks we consider quarks, which have the same mass as the sea quarks with corresponding pion masses in the range 340 MeV < m_PS < 525 MeV, as well as partially quenched quarks, which have the mass of the physical s quark. We extract masses of states with isospin I = 0, 1/2, 1, with strangeness S = 0, -1, -2, with angular momentum of the light degrees of freedom j = 0, 1 and with parity P = +, -. We present a preliminary extrapolation in the light u/d and an interpolation in the heavy b quark mass to the physical point and compare with available experimental results.

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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