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arXiv · 1511.01689

More Higgses at the LHC and the Electroweak Phase Transition

G. C. Dorsch·S. J. Huber·K. Mimasu·J. M. No
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Abstract

A cosmological first order electroweak phase transition could explain the origin of the cosmic matter-antimatter asymmetry. While it does not occur in the Standard Model, it becomes possible in the presence of a second Higgs doublet. In this context, we obtain the properties of the new scalars $H_0$, $A_0$ and $H^{\pm}$ leading to such a phase transition, showing that its key LHC signature would be the decay $A_0 \rightarrow H_0 Z$, and we analyze the promising LHC search prospects for this decay in the $\ell \ell b\bar{b}$ and $\ell \ell W^{+} W^{-}$ final states. Finally, we comment on the impact of the $A_0 \rightarrow H_0 Z$ decay on current LHC searches for $A_0$ decaying into SM particles.

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G. C. Dorsch, S. J. Huber, K. Mimasu, J. M. No. 2015-11-05. More Higgses at the LHC and the Electroweak Phase Transition. https://arxiv.org/abs/1511.01689

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