Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-11-28
Phys.Lett. B347 (1995) 332-340
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 text pages (Latex) and 8 postscript figures in a uuencoded file
Scientific paper
10.1016/0370-2693(95)00074-U
We construct a simple class of exact solutions of the electroweak theory including the naked $Z$--string and fermion fields. It consists in the $Z$--string configuration ($\phi,Z_\theta$), the {\it time} and $z$ components of the neutral gauge bosons ($Z_{0,3},A_{0,3}$) and a fermion condensate (lepton or quark) zero mode. The $Z$--string is not altered (no feed back from the rest of fields on the $Z$--string) while fermion condensates are zero modes of the Dirac equation in the presence of the $Z$--string background (no feed back from the {\it time} and $z$ components of the neutral gauge bosons on the fermion fields). For the case of the $n$--vortex $Z$--string the number of zero modes found for charged leptons and quarks is (according to previous results by Jackiw and Rossi) equal to $|n|$, while for (massless) neutrinos is $|n|-1$. The presence of fermion fields in its core make the obtained configuration a superconducting string, but their presence (as well as that of $Z_{0,3},A_{0,3}$) does not enhance the stability of the $Z$--string.
Moreno Jesus M.
Oaknin David H.
Quiros Mariano
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