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arXiv 1310.7629hep-ph
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自发破缺规范理论中真空期望值的重整化:双圈结果

Renormalization of vacuum expectation values in spontaneously broken gauge theories: Two-loop results

Marcus Sperling, Dominik Stöckinger, Alexander Voigt

摘要:

利用O(g^4)项的缺失,完成了规范理论中真空期望值β函数的双圈计算。给出了一般理论和超对称理论在任意R_xi规范下直至双圈水平的完整双圈结果。结果是通过标量背景场获得的,与我们以前的分析相同。作为副产品,一般超对称理论的双圈标量反常维数。作为应用,我们计算MSSM、NMSSM和E6SSM中VEV和tan(beta)的beta函数。

英文摘要:

We complete the two-loop calculation of beta-functions for vacuum expectation values (VEVs) in gauge theories by the missing O(g^4)-terms. The full two-loop results are presented for generic and supersymmetric theories up to two-loop level in arbitrary R_xi-gauge. The results are obtained by means of a scalar background field, identical to our previous analysis. As a by-product, the two-loop scalar anomalous dimension for generic supersymmetric theories is presented. As an application we compute the beta-functions for VEVs and tan(beta) in the MSSM, NMSSM, and E6SSM.

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