The KM phase in semirealistic heterotic orbifold models
Abstract
In stringinspired semirealistic heterotic orbifolds models with an anomalous U(1) _{X}, a nonzero KobayashiMasakawa (KM) phase is shown to arise generically from the expectation values of complex scalar fields, which appear in nonrenormalizable quark mass couplings. Modular covariant nonrenormalizable superpotential couplings are constructed. A toy Z _{3} orbifold model is analyzed in some detail. Modular symmetries and orbifold selection rules are taken into account and do not lead to a cancellation of the KM phase. We also discuss attempts to obtain the KM phase solely from renormalizable interactions.
 Publication:

Nuclear Physics B
 Pub Date:
 February 2001
 DOI:
 10.1016/S05503213(00)006209
 arXiv:
 arXiv:hepph/0007193
 Bibcode:
 2001NuPhB.595....3G
 Keywords:

 High Energy Physics  Phenomenology;
 High Energy Physics  Theory;
 Mathematical Physics
 EPrint:
 Error in Section 2, "Counterexamples," corrected