GUT models at current and future hadron colliders and implications to dark matter searches

Abstract

Grand Unified Theories (GUT) offer an elegant and unified description of electromagnetic, weak and strong interactions at high energy scales. A phenomenological and exciting possibility to grasp GUT is to search for TeV scale observables arising from Abelian groups embedded in GUT constructions. That said, we use dilepton data (ee and µµ) that has been proven to be a golden channel for a wide variety of new phenomena expected in theories beyond the Standard Model to probe GUT-inspired models. Since heavy dilepton resonances feature high signal selection efficiencies and relatively well-understood backgrounds, stringent and reliable bounds can be placed on the mass of the Z gauge boson arising in such theories. In this work, we obtain 95% C.L. limits on the Z mass for several GUT-models using current and future proton-proton colliders with √ s = 13 TeV, 33 TeV, and 100 TeV, and put them into perspective with dark matter searches in light of the next generation of direct detection experiments.Dedicated to the memory of Pierre Binétruy PACS numbers: 2 Our analysis is focused on hadron colliders. Linear e + e − would be also an interesting option [9].

Z′ portal to Chern-Simons Dark Matter

“…This is somewhat an unreasonable behavior possibly leading to the violation of unitarity (see, for example, refs. [37,38,51,130,131]). We emphasize here that the studied phenomenological Lagrangian is actually the low-energy effective theory limit of a more complete framework.…”

Phenomenological analysis of an E6 -inspired seesaw model

“…For this configuration, the masses of the two Z bosons are 3.4 TeV and 10.3 TeV. In the future, the completion of lhc 14 TeV runs could provide enough data to exclude the Z boson mass up to 6 TeV, and prospects at a 100 TeV collider could place bounds as high as 30 TeV on the Z masses [41].…”

Dark sequential Z′ portal: Collider and direct detection experiments

“…Seen usually as natural consequences of a symmetry breaking chain in Grand Unified Theories (GUTs) [67] and many other extended gauge sectors [56,57,62,[69][70][71][72][73][74][75], U (1) groups are ubiquitous in high energy physics model building for being the simplest continuous Abelian group available. The breaking down to the SM group typically leads to a massive gauge boson.…”