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arXiv · 1205.2692

LHC explores what LEP hinted at: CP-violating type-I 2HDM

Wolfgang Mader·Jae-hyeon Park·Giovanni Marco Pruna·Dominik Stöckinger·Arno Straessner
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Abstract

The Large Hadron Collider is shown to have great scope for a light charged Higgs discovery, in the context of the CP-violating type-I two Higgs doublet model. This scenario with similar masses of $H^\pm$ and W was suggested by the puzzling departure from charged current lepton universality found in the LEP data. With the lightest neutral Higgs mass set to 125 GeV, the charged-neutral Higgs associated production mechanism can cause a significant excess in the $τνb \bar{b}$ events over a vast range of tan beta as long as the Higgs mixing pattern avoids a few limiting cases. Thanks to the low $H^\pm$ mass, the charged Higgs loop can play a striking role in neutral Higgs decays into $γγ$, thereby compensating for a suppressed gluon-gluon fusion rate. The effect of scalar-pseudo-scalar mixing on loop-induced Higgs signals is also discussed.

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Wolfgang Mader, Jae-hyeon Park, Giovanni Marco Pruna, Dominik Stöckinger, Arno Straessner. 2014-01-13. LHC explores what LEP hinted at: CP-violating type-I 2HDM. https://doi.org/10.1007/jhep09(2012)125%2010.1007%2Fjhep01(2014)006

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