Do Stops Slow Down Electroweak Bubble Walls?
High Energy Physics - Phenomenology
2009-10-31 v3
Abstract
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.
Keywords
Cite
@article{arxiv.hep-ph/0002050,
title = {Do Stops Slow Down Electroweak Bubble Walls?},
author = {P. John and M. G. Schmidt},
journal= {arXiv preprint arXiv:hep-ph/0002050},
year = {2009}
}
Comments
Numerical error corrected, result qualitatively unchanged