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arXiv 1203.3207hep-phhep-ex
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LHC上的MSSM希格斯玻色子

MSSM Higgs Bosons at The LHC

Neil Christensen, Tao Han, Shufang Su

摘要:

在最小超对称(SUSY)标准模型(MSSM)的Higgs扇区中存在两个不同的区域:(a)较轻的CP偶Higgs玻色子类SM和非SM类希格斯玻色子玻色子类SM和非SM类Higgs玻(b)较重的CP偶希格斯玻色子是类SM玻色子,而中性的非类SM希格斯玻色子玻色子在100 GeV附近(非退耦区)几乎都是简并的。由于在MSSM中预测的希格斯粒子衰变到W+W-和ga,ga之间的强相关性,W+W-终态信号的不足将与ga,ga峰直接冲突。如果我们单独考虑W+W-,W+W-信号的缺失意味着类SM的希格斯玻色子与W+-的耦合减少,而其他非类SM的希格斯玻色子不应该太重,也不会去耦。如果ga,ga过剩和W+W-的缺失都继续下去,那么将需要新的物理学来超越MSSM。W+W-通道和tau+tau-通道之间存在类似的相关性:减少的W+W-通道将迫使tau+tau-通道更大。未来在大型强子对撞机上寻找类似SM的希格斯玻色子玻色子将为MSSM的预测提供关键的检验。我们强调了电弱过程pp->H+H-,H+-A0的潜在重要性,这些过程除了质量外与超对称性参数无关。此外,在非解耦区域中,可能存在来自pp->H+-h 0,A0 h 0和W+-H 0,ZH 0的相当大的贡献,这可以用于区分模型参数。我们改变相关的超对称性参数在很宽的范围内,并证明这些参数和相关的超对称性粒子的相关性和约束。

英文摘要:

Accepting the existence of a SM-like Higgs boson in the range 123GeV-127GeV as indicated by the observed ga,ga events, there are two distinct regions left in the Minimal Supersymmetric (SUSY) Standard Model (MSSM) Higgs sector: (a) the lighter CP-even Higgs boson SM-like and the non-SM-like Higgs bosons all heavy and nearly degenerate above 300GeV; (b) the heavier CP-even Higgs boson being SM-like and the neutral non-SM-like Higgs bosons all nearly degenerate around 100GeV (a non-decoupling region). Due to the strong correlation between the Higgs decays to W+W- and to ga,ga predicted in the MSSM, the deficit of a W+W- final state signal would be in direct conflict with the ga,ga peak. If we consider W+W- on its own, the absence of the W+W- signal would imply that the SM-like Higgs boson has reduced coupling to W+-, and that the other non-SM-like Higgs bosons should not be too heavy and do not decouple. If both the ga,ga excess and the absence of W+W- continue, new physics beyond the MSSM will be required. A similar correlation exists between the W+W- and tau+tau- channels: a reduced W+W- channel would force the tau+tau- channel to be larger. Future searches for the SM-like Higgs boson at the LHC will provide critical tests for the MSSM prediction. We emphasize the potential importance of the electroweak processes pp->H+H-, H+-A0, which are independent of the SUSY parameters except for their masses. In addition, there may be sizable contributions from pp->H+-h0, A0h0 and W+-H0, ZH0 in the non-decoupling region, which may serve to discriminate the model parameters. We vary the relevant SUSY parameters in a broad range and demonstrate the correlations and constraints on these parameters and associated SUSY particles.

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