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

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 asmore » the two same-sign leptons with two jets, monojet and monojet with a monolepton.« less

Authors:
 [1];  [2];  [3];  [3];  [4]
  1. ICTP South American Institute for Fundamental Research, Instituto de Física Teórica, Universidade Estadual Paulista,R. Dr. Bento Teobaldo Ferraz 271, 01140-070 São Paulo (Brazil)
  2. (Austria)
  3. Instituto de Física, Universidade de São Paulo,Rua do Matão 1371, 05508-090 São Paulo (Brazil)
  4. (Germany)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22572143
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2016; Journal Issue: 09; Other Information: PUBLISHER-ID: JCAP09(2016)005; OAI: oai:repo.scoap3.org:17024; cc-by Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASYMMETRY; BARYON NUMBER; BARYONS; CERN LHC; FIELD OPERATORS; JET MODEL; LEPTON NUMBER; LEPTONS; NONLUMINOUS MATTER; STANDARD MODEL; WILSON LOOP

Citation Formats

Bernal, Nicolás, Institute of High Energy Physics, Austrian Academy of Sciences,Nikolsdorfer Gasse 18, 1050 Vienna, Fong, Chee Sheng, Fonseca, Nayara, and DESY,Notkestraße 85, 22607 Hamburg. Sharing but not caring: dark matter and the baryon asymmetry of the universe. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/09/005.
Bernal, Nicolás, Institute of High Energy Physics, Austrian Academy of Sciences,Nikolsdorfer Gasse 18, 1050 Vienna, Fong, Chee Sheng, Fonseca, Nayara, & DESY,Notkestraße 85, 22607 Hamburg. Sharing but not caring: dark matter and the baryon asymmetry of the universe. United States. doi:10.1088/1475-7516/2016/09/005.
Bernal, Nicolás, Institute of High Energy Physics, Austrian Academy of Sciences,Nikolsdorfer Gasse 18, 1050 Vienna, Fong, Chee Sheng, Fonseca, Nayara, and DESY,Notkestraße 85, 22607 Hamburg. Fri . "Sharing but not caring: dark matter and the baryon asymmetry of the universe". United States. doi:10.1088/1475-7516/2016/09/005.
@article{osti_22572143,
title = {Sharing but not caring: dark matter and the baryon asymmetry of the universe},
author = {Bernal, Nicolás and Institute of High Energy Physics, Austrian Academy of Sciences,Nikolsdorfer Gasse 18, 1050 Vienna and Fong, Chee Sheng and Fonseca, Nayara and DESY,Notkestraße 85, 22607 Hamburg},
abstractNote = {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.},
doi = {10.1088/1475-7516/2016/09/005},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 09,
volume = 2016,
place = {United States},
year = {Fri Sep 02 00:00:00 EDT 2016},
month = {Fri Sep 02 00:00:00 EDT 2016}
}