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arXiv 0710.2409hep-ph
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底夸克聚变中MSSM希格斯玻色子玻色子产生的精确预言

Precise predictions for MSSM Higgs-boson production in bottom-quark fusion

Alexander Mück

摘要:

在强子对撞机上产生超对称希格斯粒子的主要机制关键取决于它们与底夸克的汤川耦合的大小。对于足够大的tan(β),MSSM中某些中性希格斯玻色子玻色子的总截面主要由底夸克聚变决定。在介绍了底关联Higgs产生的基础上,讨论了MSSM中bb-熔合通道的O(alpha)电弱和O(alpha_s)强修正。选择适当的重整化和输入参数的计划,一个改进的玻恩近似,从以前已知的结果构造,可以吸收大部分的校正,使剩余的非普遍的校正通常是几个百分点的顺序。SPS基准场景的数值结果进行了讨论。

英文摘要:

The main production mechanism for supersymmetric Higgs particles at hadron colliders crucially depends on the size of their Yukawa couplings to bottom quarks. For sufficiently large tan(beta) the total cross section for some of the neutral Higgs bosons in the MSSM is dominated by bottom-quark fusion. After an introduction to bottom-associated Higgs production, we discuss the complete O(alpha) electroweak and O(alpha_s) strong corrections for the bb-fusion channel in the MSSM. Choosing proper renormalization and input-parameter schemes, an improved Born approximation, constructed from previously known results, can absorb the bulk of the corrections so that the remaining non-universal corrections are typically of the order of a few per cent. Numerical results are discussed for the SPS benchmark scenarios.

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