Tuesday, May 15, 2012

1205.3070 (Leonardo Leitao et al.)

Gravitational waves from the electroweak phase transition    [PDF]

Leonardo Leitao, Ariel Megevand, Alejandro D. Sanchez
We study the generation of gravitational waves in the electroweak phase transition. We consider several extensions of the Standard Model, namely, the addition of scalar singlets, the minimal supersymmetric extension and the addition of TeV fermions. Taking into account the complete dynamics of the phase transition, we compute the characteristic frequency and the intensity of the gravitational radiation. We discuss the detectability by proposed spaceborne detectors. In particular, we consider the European project eLISA, which is expected to be constructed in the near future. Although the predicted signal is in most cases rather low for the sensitivity of this detector, models with strongly coupled extra scalars give intensities as high as $h^2 \Omega_{GW}\sim 10^{-7}$ for frequencies $f\sim 10^{-4} Hz$ or below, which lie above the sensitivity curve.
View original: http://arxiv.org/abs/1205.3070

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