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arXiv · 1412.3823

First order electroweak phase transition triggered by the Higgs portal vector dark matter

Wei Chao
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Abstract

We investigate an extension of the Standard Model (SM) with a U(1)' gauge symmetry, which is spontaneously broken by a complex scalar singlet and where the new gauge boson is a stable dark matter candidate via a Z2 flavor symmetry. The possibility of generating a strongly first order electroweak phase transition (EWPT) needed for the electroweak baryogenesis mechanism in this model is studied using a gauge independent method. Our result shows a considerable parameter space where both successful dark matter phenomenologies and a strongly first order EWPT can be achieved.

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Wei Chao. 2014-12-11. First order electroweak phase transition triggered by the Higgs portal vector dark matter. https://doi.org/10.1103/physrevd.92.015025

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