arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0907.5376hep-ph
收藏

对MSSM中Delta F=2有效哈密顿量的精确NLO强相互作用修正

Exact NLO strong interaction corrections to the Delta F=2 effective Hamiltonian in the MSSM

Javier Virto

摘要:

我们计算了具有完全任意软项的最小超对称标准模型中Delta F=2有效哈密顿量的Wilson系数的α_s^3阶修正。这些结果是相关的中性介子混合的现象学研究中存在的大夸克质量分裂,特别是在超对称的层次方案。这些校正实现了与匹配尺度模糊相关的不确定性的相当大的减少,并且因此是数值相关的。我们简要地分析了某些质量分裂对非线性光学修正大小的影响,并将其与质量插入近似中几乎简并方的情况进行了比较。

英文摘要:

We compute the order alpha_s^3 (next-to-leading) corrections to the Wilson coefficients of the Delta F=2 effective Hamiltonian in the Minimal Supersymmetric Standard Model with completely arbitrary soft terms. These results are relevant for phenomenological studies of neutral meson mixings in the presence of large squark mass splittings, in particular in hierarchical scenarios of supersymmetry. These corrections achieve a considerable reduction of the uncertainty related to the matching scale ambiguity, and are therefore numerically relevant. We briefly analyze the effect of certain mass splittings on the size of the NLO corrections, and compare it with the case of almost degenerate squarks in the mass insertion approximation.

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。

↑