Journal Article

The dark side of 4321

Guadagnoli, Diego, Stangl, Peter, Reboud, Méril

2020

Overview

A bstract The evidence of Dark Matter (DM) is one of the strongest observational arguments in favor of physics beyond the Standard Model. Despite expectations, a similar evidence has been lacking so far in collider searches, with the possible exception of B -physics discrepancies, a coherent set of persistent deviations in a homogeneous dataset consisting of b → c and b → s semi-leptonic transitions. We explore the question whether DM and the B discrepancies may have a common origin. We do so in the context of the so-called 4321 gauge model, a UV-complete and calculable setup that yields a U 1 leptoquark, the by far most successful single mediator able to explain the B anomalies, along with other new gauge bosons, including a Z ′. Adding to this setup a ‘minimal’ DM fermionic multiplet, consisting of a 4 under the 4321’s SU(4), we find the resulting model in natural agreement with the relic-density observation and with the most severe direct-detection bounds, in the sense that the parameter space selected by B physics is also the one favored by DM phenomenology. The DM candidate is a particle with a mass in the WIMP range, freeze-out dynamics includes a co-annihilator (the ‘rest’ of the 4 multiplet), and the most important gauge mediator in the DM sector is the Z ′.

• Publisher: Springer Berlin Heidelberg,Springer,SpringerOpen
• Subject: Beyond Standard Model / Classical and Quantum Gravitation / Cosmology of Theories beyond the SM / Elementary Particles / Heavy Quark Physics / High Energy Physics - Phenomenology / Physics / Physics and Astronomy / Quantum Field Theories / Quantum Field Theory / Quantum Physics / Regular Article - Theoretical Physics / Relativity Theory / String Theory