XXV DAE-BRNS High Energy Physics Symposium 2022

Dark matter and vacuum stability in a non-supersymmetric SO(10) GUT scalar dark matter model

12 Dec 2022, 18:15

15m

LH4 (IISER Mohali)

Talk WG2-Beyond the Standard Model

Speaker

Mr Nilavjyoti Hazarika (Gauhati University)

Description

In this work we study a viable dark matter (DM) mass region in a non-supersymmetric $SO(10)$ GUT scalar dark matter model. The model comprises of a scalar singlet $S$ and an inert doublet $\varphi$ which are odd under a discrete $Z_2$ matter parity $(-1{)}^{(B-L)}$. The DM is a mixture of $Z_2$ - odd scalar singlet $S$ and neutral component of doublet $\varphi$ belonging to a new scalar 16 representation of $SO(10)$. We also analyse the one-loop vacuum stability by solving Renormalisation Group Equations (RGEs) for the parameters of the model. Next, we investigate the model predictions with the current theoretical and experimental constraints, and identify the range of parameter space which is consistent with relic density and direct search limits from the latest XENON1T result, as well as realising the stability of the electroweak vacuum up to the Planck scale. The predictions of the model are testable in future DM search experiments, along with the feature that is a part of an elegant grand unified theory.