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arXiv 1306.3926hep-ph
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实NMSSM中三线性Higgs自耦合的高阶修正

Higher Order Corrections to the Trilinear Higgs Self-Couplings in the Real NMSSM

Dao Thi Nhung, Margarete Muhlleitner, Juraj Streicher, Kathrin Walz

摘要:

在大型强子对撞机实验ATLAS和CMS发现类希格斯玻色子后,确定其性质至关重要,不仅可以确定它是负责电弱对称性破缺的玻色子,还可以澄清它是标准模型(SM)希格斯玻色子还是超出SM的希格斯粒子,如{ \it例如}。超对称性在这种情况下,希格斯参数作为质量和耦合的精确预测对于正确区分不同模型起着至关重要的作用。在推广前人关于次极小超对称延拓(NMSSM)的环修正希格斯玻色子质量的工作的基础上,本文给出了环修正NMSSM三线性Higgs自耦合的计算.结果表明,环修正对Higgs到Higgs衰变的衰变宽度和通过胶子融合产生Higgs对的截面有重大影响。因此,它们对于正确解释希格斯实验结果是必不可少的。

英文摘要:

After the discovery of a Higgs-like boson by the LHC experiments ATLAS and CMS, it is of crucial importance to determine its properties in order to not only identify it as the boson responsible for electroweak symmetry breaking but also to clarify the question if it is a Standard Model (SM) Higgs boson or the Higgs particle of some extension beyond the SM as {\it e.g.} supersymmetry. In this context, the precise prediction of the Higgs parameters as masses and couplings play a crucial role for the proper distinction between different models. In extension of previous works on the loop-corrected Higgs boson masses of the Next-to-Minimal Supersymmetric Extension of the SM (NMSSM), we present here the calculation of the loop-corrected trilinear NMSSM Higgs self-couplings. The loop corrections turn out to have a substantial impact on the decay widths of Higgs-to-Higgs decays and on the production cross section of Higgs pairs via gluon fusion. They are therefore indispensable for the correct interpretation of the experimental Higgs results.

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