Advanced search
Start date
Betweenand
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Sharing but not caring: dark matter and the baryon asymmetry of the universe

Full text
Author(s):
Bernal, Nicolas ; Fong, Chee Sheng ; Fonseca, Nayara
Total Authors: 3
Document type: Journal article
Source: Journal of Cosmology and Astroparticle Physics; n. 9 SEP 2016.
Web of Science Citations: 5
Abstract

We consider scenarios where Dark Matter (DM) particles carry baryon and/or lepton numbers, which can be defined if there exist operators connecting the dark to the visible sector. As a result, the DM fields become intimately linked to the Standard Model (SM) ones and can be maximally asymmetric just like the ordinary matter. In particular, we discuss minimal scenarios where the DM is a complex scalar or a Dirac fermion coupled to operators with nonzero baryon and/or lepton numbers, and that consist of only SM fields. We consider an initial asymmetry stored in either the SM or the DM sector; the main role of these operators is to properly share the asymmetry between the two sectors, in accordance with observations. After the chemical decoupling, the DM and SM sectors do not care about each other as there is only an ineffective communication between them. Once the DM mass is specified, the Wilson coefficients of these operators are fixed by the requirement of the correct transfer of the asymmetry. We study the phenomenology of this framework at colliders, direct detection and indirect detection experiments. In particular, the LHC phenomenology is very rich and can be tested in different channels such as the two same-sign leptons with two jets, monojet and monojet with a monolepton. (AU)

FAPESP's process: 15/15361-4 - Non-minimal dark matter models and beyond standard model physics
Grantee:Nayara Fonseca de Sá
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 12/10995-7 - Particle physics phenomenology
Grantee:Gustavo Alberto Burdman
Support type: Research Projects - Thematic Grants
FAPESP's process: 11/11973-4 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics
Grantee:Nathan Jacob Berkovits
Support type: Research Projects - Thematic Grants