More About Discrete Gauge Anomalies
نویسنده
چکیده
I discuss and extend several results concerning the cancellation of discrete gauge anomalies. I show how heavy fermions do not decouple in the presence of discrete gauge anomalies. As a consequence, in general, cancellation of discrete gauge anomalies cannot be described merely in terms of low energy operators involving only the light fermions. I also discuss cancellation of discrete gauge anomalies through a discrete version of the Green-Schwarz (GS) mechanism as well as the possibility of discrete gauge R-symmetries and their anomalies. Finally, some phenomenological applications are discussed. This includes symmetries guaranteeing absence of FCNC in two-Higgs models and generalized matter parities stabilizing the proton in the supersymmetric standard model. In the presence of a discrete GS mechanism or/and gauge R-symmetries, new possibilities for anomaly free such symmetries are found. * Adress after September 1992: Departamento de Fisica Teórica C-XI, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain. CERN−TH.6662/92 September 1992
منابع مشابه
Classifying gauge anomalies through symmetry-protected trivial orders and classifying gravitational anomalies through topological orders
Citation Wen, Xiao-Gang. " Classifying gauge anomalies through symmetry-protected trivial orders and classifying gravitational anomalies through topological orders. " Physical Review D 88, no. 4 (August 2013). Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made...
متن کاملDiscrete R-symmetry anomalies in heterotic orbifold models
Anomalies of discrete R-symmetries appearing in heterotic orbifold models are studied. We find that the mixed anomalies for different gauge groups satisfy the universal Green-Schwarz (GS) condition, indicating that these anomalies are canceled by the GS mechanism. An exact relation between the anomaly coefficients of the discrete Rsymmetries and one-loop beta-function coefficients is obtained. ...
متن کاملCPT and Other Symmetries in String/M Theory
We initiate a search for non-perturbative consistency conditions in M theory. Some non-perturbative conditions are already known in Type I theories; we review these and search for others. We focus principally on possible anomalies in discrete symmetries. It is generally believed that discrete symmetries in string theories are gauge symmetries, so anomalies would provide evidence for inconsisten...
متن کاملNote on discrete gauge anomalies.
We consider the probem of gauging discrete symmetries. All valid constraints on such symmetries can be understood in the low energy theory in terms of instantons. We note that string perturbation theory often exhibits global discrete symmetries, which are broken non-perturbatively.
متن کاملNatural R–Parity, μ–term, and Fermion Mass Hierarchy From Discrete Gauge Symmetries
In the minimal supersymmetric Standard Model with seesaw neutrino masses we show how R–parity can emerge naturally as a discrete gauge symmetry. The same discrete symmetry explains the smallness of the μ–term (the Higgsino mass parameter) via the Giudice–Masiero mechanism. The discrete gauge anomalies are cancelled by a discrete version of the Green–Schwarz mechanism. The simplest symmetry grou...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1993