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arXiv 1301.7202hep-lathep-ph
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c和b夸克质量的测定

Determination of c and b quark masses

C. Davies

摘要:

在过去的几年里,夸克质量的测定已经被现实的格点量子色动力学的精确结果所改变。这就意味着有了一系列的新方法来研究b夸克和c夸克,我将结合连续谱技术的结果来描述这些方法。最近格点量子色动力学作用量的改进以及包括海夸克在内的胶子组态在精细格点上的产生,为我们处理具有相对论作用量的重夸克提供了可行的方法。这使我们第一次能够通过精确测定夸克质量的比值,如m_c/m_s,把重扇区和轻扇区联系起来。这样的比例使我们能够利用c和b质量测定的准确性来确定s和轻夸克的质量。不同方法和形式化的夸克质量的比较为QCD提供了强有力的检验,而质量本身在计算LHC各种过程的截面时也是需要的,例如H到bb。

英文摘要:

The determination of quark masses has been transformed in the past few years by accurate results from realistic lattice QCD. This has meant a range of new methods for both b and c quarks which I will describe along with results from continuum techniques. The recent improvement in Lattice QCD actions along with the generation of gluon configurations including sea quarks on fine lattices has given us viable methods for handling heavy quarks with relativistic actions. This has allowed us for the first time to connect the heavy and light sectors through accurate determination of ratios of quark masses, such as m_c/m_s. Such ratios enable us to leverage the accuracy of c and b mass determinations into accurate s and light quark masses. The comparison of quark masses from different methods and formalisms provides a strong test of QCD and the masses themselves are needed in calculations for the cross-sections of various processes at LHC, for example H to bb.

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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