科研之友
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摘要
We demonstrate that the stability of the semilocal vortex can be significantly improved by the presence of a dilatonic coupling of the form eq vertical bar Phi vertical bar(2)/eta(2) F mu nu F-mu nu with q %26gt; 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 (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 %26lt; beta %26lt; 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).
- 出版日期2013-9-16
