PT Journal
AU Fuentes-Martin, J
   Portoles, J
   Ruiz-Femenia, P
TI Instanton-mediated baryon number violation in non-universal gauge extended models
SO Journal of High Energy Physics
JI J. High Energy Phys.
PY 2015
BP 134
EP 34pp
VL 01
IS 1
DI 10.1007/JHEP01(2015)134
LA English
DE Beyond Standard Model; Solitons Monopoles and Instantons; Effective field theories; Global Symmetries
AB Instanton solutions of non-abelian Yang-Mills theories generate an effective action that may induce lepton and baryon number violations, namely Delta B = Delta L = nf, being nf the number of families coupled to the gauge group. In this article we study instanton mediated processes in a SU( 2)(l)circle times SU(2)(h)circle times U(1) extension of the Standard Model that breaks universality by singularizing the third family. In the construction of the instanton Green functions we account systematically for the inter-family mixing. This allows us to use the experimental bounds on proton decay in order to constrain the gauge coupling of SU(2)(h). Tau lepton non-leptonic and radiative decays with Delta B = Delta L = 1 are also analysed.
ER