Gauge coupling unification in correlation study of proton decay

Abstract Proton decay has been studied for decades now as one of the consequences of grand unified theories. Among those theories exists SU (5) theory, firstly postulated by H. Georgi and S. Glashow [1]. However, there were some problems with this theory such as mass degeneration and coupling unification [1-3]. This created a need for an extension of an original SU (5) model – a specific minimal SU (5) [4-5]. In this minimal SU (5) there is a viable parameter space with achievable gauge coupling unification. In this article, we present the process of gauge coupling unification for three mass scales of new physics states in this model, namely for 1 TeV, 10 TeV, and 100 TeV.