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arXiv 1108.5591hep-ph
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重夸克势的质量依赖性及其对夸克偶素态的影响

Mass dependence of the heavy quark potential and its effects on quarkonium states

Alexander Laschka, Norbert Kaiser, Wolfram Weise

摘要:

重夸克-反夸克势在微扰QCD和格点模拟中都可以得到。通过限制傅里叶变换构造了微扰短程部分,覆盖了微扰QCD适用的动量区域。我们表明,对于首阶静态项以及质量相关修正,微扰部分可以在中间距离与格点量子色动力学的结果相匹配。从这些匹配的潜力,夸克偶素光谱与一个单一的自由参数(重夸克质量)推导出并与经验谱进行比较。此外,还推导出了粲夸克和底夸克的质量。

英文摘要:

The heavy quark-antiquark potential is accessible in perturbative QCD and in lattice simulations. The perturbative short-distance part of the potential is contructed via a restricted Fourier transform, covering the momentum region where perturbative QCD is applicable. We show that for the leading order static term as well as for the mass dependent corrections, the perturbative part can be matched at intermediate distances with results from lattice QCD. From these matched potentials, quarkonium spectra with a single free parameter (the heavy quark mass) are derived and compared with empirical spectra. Furthermore, charm and bottom quark masses are deduced.

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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