Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-04-12
Phys.Lett.B388:524-531,1996
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages. Standard Latex. Four tables. reference added. Table modified to fit page
Scientific paper
10.1016/S0370-2693(96)01187-2
It was recently suggested that the reported anomalies in $R_b$ and $R_c$ can be interpreted as the effect of a heavy vector boson that couples to quarks and is universally decoupled from leptons. We examine how an extra gauge boson with this property can arise from superstring derived models. In a specific three generation model we show that the $U(1)_{B-L}$ symmetry combines with the horizontal flavor symmetries to form a universal leptophobic $U(1)$ symmetry. In our model there is an enhancement of the color gauge group from twisted sectors. The enhancement occurs after the breaking of the unifying gauge symmetry by ``Wilson lines''. The leptophobic $U(1)$ symmetry then becomes a generator of the color $SU(4)$ gauge group. We examine how similar symmetries may appear in other string models without the enhancement. We propose that if the current LEP anomalies persist it may be evidence for a certain class of un--unified superstring models.
Faraggi Alon E.
Masip Manuel
No associations
LandOfFree
Leptophobic Z' from Superstring Derived Models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Leptophobic Z' from Superstring Derived Models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Leptophobic Z' from Superstring Derived Models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-463969