High Energy Thresholds in SUSY GUTs - A refined analysis

TL;DR

This paper refines a method to analyze the impact of high energy thresholds in SUSY GUTs, updating the parameter space constraints with recent experimental data including LHC results.

Contribution

It introduces an improved parametrization for high energy thresholds and applies it to refine the allowed regions in minimal SO(10) models based on current experimental constraints.

Findings

Updated parameter space regions consistent with recent measurements

Stricter bounds from LHC Higgs and SUSY exclusion limits

Enhanced understanding of GUT unification constraints

Abstract

In a previous paper we have developed a novel method in order to parametrize the effect of the large number of HETs into as fewer parameters as possible. Apart from its obvious advantages this parametrization serves as a vehicle for the examination of the validity of a minimal SO(10) model concerning a series of constraints. Among them is demand for unification of the gauge couplings, the experimental values of the strong coupling constant and lower experimental bound of the proton lifetime. All of these claims lead to preferred regions both in the soft the superheavy parameter space. In this paper we give the necessary updates of our results which stem mainly from the recent experimental measurements. We also include some additions in our analysis involving the universal trilinear coupling A_0 and the rate x, which is related to superheavy vevs. Finally we cross-check the preferred regions of the parameter space and narrow the even more by applying new constraints based on the results of the LHC experiment for the mass of the Higgs particle and the supersymmetry exclusion limits.