Proton decay in 5D SU(6) GUT with orbifold S^1/Z_2 breaking in Scherk-Schwarz mechanism

TL;DR

This paper investigates proton decay in a 5D SU(6) GUT model with orbifold S^1/Z_2 breaking and Scherk-Schwarz mechanism, showing that certain heavy gauge bosons do not induce rapid decay, thus ensuring a longer proton lifetime.

Contribution

It demonstrates that orbifold parity splitting prevents leptoquark gauge bosons and baryon number violation, stabilizing the proton in the 5D SU(6) GUT model with Scherk-Schwarz breaking.

Findings

Heavy gauge bosons do not induce proton decay.

Orbifold parity splitting prevents baryon number violation.

Proton lifetime is not too short in the model.

Abstract

Proton decay within 5-dimensional SU(6) GUT with orbifold S^1/Z_2 breaking is investigated using Scherk-Schwarz mechanism. It is shown that in the model neither leptoquark like heavy gauge bosons nor violation of baryon number conservation are allowed due to the orbifold breaking parity splitting. These results prevent too short proton lifetime within the model.