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Electroweak phase transition beyond the standard modelстатья
- Авторы: Dolgopolov M.V., Dubinin M.N., Rykova E.N.
- Сборник: Proceedings of Science QFTHEP2010
- Серия: QFTHEP
- Том: 70
- Год издания: 2010
- Издательство: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
- Местоположение издательства: Italy
- Первая страница: 1
- Последняя страница: 8
- Аннотация: In the framework of the two-Higgs-doublet model with temperature-dependent effective parameters $\lambda_{1,...7}(T)$ we define the four bifurcation sets which appear as a consequence of the condition ${\tt det} \partial^2 U_{ij}/ \partial v_i \partial v_j =$0 for the stability matrix. Numerical investigations of the electroweak phase transition are performed for the full MSSM parameter space ($m_{H^\pm}$, ${\tt tg}\beta$, $A_{t,b}$, $\mu$, $m_Q$, $m_U$, $m_D$) using the temperature-dependent effective parameters $\lambda_1$-$\lambda_5(T)$ calculated at the one-loop in the imaginary time formalism. Four types of transitions can take place in the MSSM background field space ($v_1$, $v_2$). They are different in the direction, defined by a critical angle in the ($v_1$, $v_2$) plane, and in the strength, which is estimated by means of Shaposhnikov criteria $v_c/T_c >$1. Extensive regions in the ($A_{t,b}$, $\mu$) plane correspond to the strongly first order phase transition. The case of light top quark superpartner is favored, giving an acceptable configurations of surfaces for extrema of the effective potential.
- Добавил в систему: Дубинин Михаил Николаевич