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arXiv 0710.2880hep-lat
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2+1格点量子色动力学中B_s^0和B_d^0混合参数的确定

A determination of the B_s^0 and B_d^0 mixing parameters in 2+1 lattice QCD

R. Todd Evans, Elvira Gamiz, Aida X. El-Khadra, Massimo Di Pierro

摘要:

本文报道了我们在用Asqtad(轻夸克)作用量和Fermilab(重夸克)作用量分析B^0- \bar B^0混合过程中所用的矩阵元的非猝灭计算的进展。我们计算了中性B介子系统的质量差和宽度差的强子参数。给出了f_{B_q} ^2 B_q和f_{B_s} ^2 B_{B_s} / f_{B_d} ^2 B_{B_d}比值的初步结果。

英文摘要:

We report on the advances in our unquenched calculation of the matrix elements relevant for the analysis of B^0-\bar B^0 mixing using the Asqtad (light quark) and Fermilab (heavy quark) actions. We have calculated the hadronic parameters for the mass and width differences in the neutral B meson system. Preliminary results are presented for f_{B_q}^2 B_q as well as for the ratio ξ^2=f_{B_s}^2 B_{B_s}/f_{B_d}^2 B_{B_d}.

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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