Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-02-24
Nucl.Phys.B503:387-404,1997
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages, latex + psfig, 3 figures
Scientific paper
10.1016/S0550-3213(97)00412-4
Electroweak baryogenesis is an interesting theoretical scenario, which demands physics beyond the Standard Model at energy scales of the order of the weak boson masses. It has been recently emphasized that, in the presence of light stops, the electroweak phase transition can be strongly first order, opening the window for electroweak baryogenesis in the MSSM. For the realization of this scenario, the Higgs boson must be light, at the reach of the LEP2 collider. In this article, we compute the baryon asymmetry assuming the presence of non-trivial CP violating phases in the parameters associated with the left-right stop mixing term and the Higgsino mass $\mu$. We conclude that a phase $|\sin \phi_{\mu}| > 0.01$ and Higgsino and gaugino mass parameters $|\mu| \simeq M_2$, and of the order of the electroweak scale, are necessary in order to generate the observed baryon asymmetry.
Carena Marcela
Quiros Mariano
Riotto Antonio
Vilja Iiro
Wagner Carlos E. M.
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