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arXiv 0906.1665hep-ph
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MSSM II的全单圈自动重整化:电荷中性伴子区、超费米子区和一些应用

Automatised full one-loop renormalisation of the MSSM II: The chargino-neutralino sector, the sfermion sector and some applications

N. Baro, F. Boudjema

摘要:

本文介绍了在最小超对称标准模型中电荷伴子/中性伴子和sfermion扇区的壳层重整化程序,该程序是在一个全自动程序SloopS中实现的,用于计算对撞机和天体物理中的单圈过程。这是我们在arXiv:0807.4668 [hep-ph]中研究的续集,其中进行了希格斯(和规范/费米子)扇区的壳重正化。混合的问题是在所有这些部门的统一和连贯的方式对待,特别是我们给一些新的见解的重正化的混合角在sfermion部门和喜欢与希格斯部门和问题的tan(β),我们讨论不同的计划。我们还进行数值比较我们的代码SloopS和不同的结果在文献中发现。特别地,我们考虑了对中性伴子和sfermion质量的环修正,e^{+}e^{-}对撞机中电荷伴子对的产生和Stau对的产生,以及一些较重电荷伴子的衰变。对于所有这些可观的,我们分析的tan(β)计划依赖使用不同的定义,这个参数和评论的影响,使用不同的重正化的混合参数在sfermion部门。

英文摘要:

An on-shell renormalisation programme for the chargino/neutralino and the sfermion sectors within the Minimal Supersymmetric Standard Model as implemented in a fully automated code, SloopS, for the calculation of one-loop processes at the colliders and in astrophysics, is presented. This is a sequel to our study in arXiv:0807.4668 [hep-ph] where an on-shell renormalisation of the Higgs (and the gauge/fermion) sector is performed. The issue of mixing is treated in a unified and coherent manner in all these sectors, in particular we give some new insight into the renormalisation of the mixing angle in the sfermion sector and like with the Higgs sector and the issue of tan(beta) we discuss different schemes. We also perform numerical comparisons between our code SloopS and different results found in the literature. In particular we consider loop corrections to the neutralino and sfermion masses, chargino pair production and stau pair production in e^{+}e^{-} colliders, as well as a few decays of the heavier chargino. For all these observables, we analyse the tan(beta) scheme dependence using different definitions of this parameter and comment on the impact of using different renormalisation of the mixing parameter in the sfermion sector.

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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