Do Stops Slow Down Electroweak Bubble Walls?

Details Do Stops Slow Down Electroweak Bubble Walls? Do Stops Slow Down Electroweak Bubble Walls?

2000-02-04

arxiv.org/abs/hep-ph/0002050v3

Nucl.Phys. B598 (2001) 291-305; Erratum-ibid. B648 (2003) 449-452

Physics

High Energy Physics

High Energy Physics - Phenomenology

Numerical error corrected, result qualitatively unchanged

Scientific paper

10.1016/S0550-3213(00)00768-9

We compute the wall velocity in the MSSM. We therefore generalize the SM equations of motion for bubble walls moving through a hot plasma at the electroweak phase transition and calculate the friction terms which describe the viscosity of the plasma. We give the general expressions and apply them to a simple model where stops, tops and W bosons contribute to the friction. In a wide range of parameters including those which fulfil the requirements of baryogenesis we find a wall velocity of order v = 0.05-0.1 much below the SM value.

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