Full 1-loop calculation of BR( B s , d 0 → ℓ ℓ ̄ ) in models beyond the MSSM with SARAH and SPheno

Abstract We present the possibility of calculating the quark flavor changing neutral current decays B s 0 → ℓ ℓ ̄ and B d 0 → ℓ ℓ ̄ for a large variety of supersymmetric models. For this purpose, the complete one-loop calculation has been implemented in a generic form in the Mathematica package SARAH. This information is used by SARAH to generate Fortran source code for SPheno for a numerical evaluation of these processes in a given model. We comment also on the possibility to use this setup for non-s... Title of program: SARAH Catalogue Id: AEIB_v2_1 Nature of problem Models beyond the SM can have new contributions to the decays of neutral B-mesons. For a precise prediction of the corresponding branching ratios a full 1-loop calculation including all possible wave, penguin and box diagrams is necessary. This usually requires a big effort and public codes for these calculations so far only support a few selected models. Versions of this program held in the CPC repository in Mendeley Data AEIB_v1_0; SARAH; 10.1016/j.cpc.2010.11.030 AEIB_v2_0; SARAH; 10.1016/j.cpc.2013.02.019 AEIB_v2_1; SARAH; 10.1016/j.cpc.2013.06.021 AEIB_v3_0; SARAH; 10.1016/j.cpc.2014.02.018 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

摘要 本文提出了针对各类超对称模型（supersymmetric models）计算夸克味变中性流（quark flavor changing neutral current）衰变B_s⁰→ℓℓ̄与B_d⁰→ℓℓ̄的可行方案。为此，我们以通用形式在Mathematica软件包SARAH中实现了完整的一圈图计算。SARAH可利用该计算结果为SPheno生成Fortran源代码，以在指定模型中对上述衰变过程开展数值评估。此外，我们还讨论了将此框架应用于非……的可能性。

程序名称：SARAH
目录编号：AEIB_v2_1
问题本质：超出标准模型（Standard Model, SM）的理论模型可对中性B介子的衰变提供新的贡献。若要精确预测对应衰变的分支比，需开展包含所有可能的自能图、企鹅图与箱图的完整一圈图计算。此类计算通常需要大量人力投入，且目前已有的公开计算程序仅支持少数选定模型。

存放在Mendeley数据集中的CPC程序库内的该程序版本：
AEIB_v1_0；SARAH；DOI:10.1016/j.cpc.2010.11.030
AEIB_v2_0；SARAH；DOI:10.1016/j.cpc.2013.02.019
AEIB_v2_1；SARAH；DOI:10.1016/j.cpc.2013.06.021
AEIB_v3_0；SARAH；DOI:10.1016/j.cpc.2014.02.018

本程序源自贝尔法斯特女王大学馆藏的CPC程序库（1969-2018）