Stabilizing the Semilocal String with a Dilatonic Coupling

Дата и время публикации : 2013-07-15T13:02:31Z

Авторы публикации и институты :
Leandros Perivolaropoulos
Nikos Platis

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 4 pages, 4 Figures. The numerical analysis files are available by e-mail upon request
Первичная категория: hep-ph

Все категории : hep-ph, astro-ph.CO, hep-th, nlin.PS

Краткий обзор статьи: We demonstrate that the stability of the semilocal vortex can be significantly improved by the presence of a dilatonic coupling of the form e^frac{q | Phi |^2}{eta^2} F_{mu nu}F^{mu nu} with q>0 where eta is the scale of symmetry breaking that gives rise to the vortex. For q=0 we obtain the usual embedded (semilocal) Nielsen-Olesen vortex. We find the stability region of the parameter beta = (frac{m_Phi}{m_A})^2 (m_Phi and m_A are the masses of the scalar and gauge fields respectively). We show that the stability region of beta is 0<beta<beta_{max}(q) where beta_{max}(q=0)=1 (as expected) and beta_{max}(q) is an increasing function of q. This result may have significant implications for the stability of the electroweak vortex in the presence of a dilatonic coupling (dilatonic electroweak vortex).

Category: Physics