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Title: A testable hidden-sector model for Dark Matter and neutrino masses

Abstract

We consider a minimal extension of the Standard Model with a hidden sector charged under a dark local U(1)' gauge group, accounting simultaneously for light neutrino masses and the observed Dark Matter relic abundance. The model contains two copies of right-handed neutrinos which give rise to light neutrino-masses via an extended seesaw mechanism. The presence of a stable Dark-Matter candidate and a massless state naturally arise by requiring the simplest anomaly-free particle content without introducing any extra symmetries. We investigate the phenomenology of the hidden sector considering the U(1)' breaking scale of the order of the electroweak scale. Confronting the thermal history of this hidden-sector model with existing and future constraints from collider, direct and indirect detection experiments provides various possibilities of probing the model in complementary ways as every particle of the dark sector plays a specific cosmological role. Across the identified viable parameter space, a large region predicts a sizable contribution to the effective relativistic degrees-of-freedom in the early Universe that allows to alleviate the recently reported tension between late and early measurements of the Hubble constant.

Authors:
 [1]; ORCiD logo [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Inst. de Fisica Teorica (IFT), Madrid (Spain); Univ. Autonoma de Madrid (Spain)
  2. Inst. de Fisica Teorica (IFT), Madrid (Spain); Univ. Autonoma de Madrid (Spain)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); Spanish Agencia Estatal de Investigacion; IFT Centro de Excelencia Severo Ochoa; Red Consolider MultiDark; European Unions Horizon 2020
OSTI Identifier:
1607972
Report Number(s):
BNL-213783-2020-JAAM
Journal ID: ISSN 1029-8479
Grant/Contract Number:  
SC0012704; FPA2015-65929-P; PGC2018- 095161-B-I00; SEV-2016-0597; FPA2017-90566-REDC; 674896; 690575
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2020; Journal Issue: 2; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; Cosmology of Theories beyond the SM; Gauge Symmetry

Citation Formats

Gehrlein, Julia, and Pierre, Mathias. A testable hidden-sector model for Dark Matter and neutrino masses. United States: N. p., 2020. Web. https://doi.org/10.1007/JHEP02(2020)068.
Gehrlein, Julia, & Pierre, Mathias. A testable hidden-sector model for Dark Matter and neutrino masses. United States. https://doi.org/10.1007/JHEP02(2020)068
Gehrlein, Julia, and Pierre, Mathias. Tue . "A testable hidden-sector model for Dark Matter and neutrino masses". United States. https://doi.org/10.1007/JHEP02(2020)068. https://www.osti.gov/servlets/purl/1607972.
@article{osti_1607972,
title = {A testable hidden-sector model for Dark Matter and neutrino masses},
author = {Gehrlein, Julia and Pierre, Mathias},
abstractNote = {We consider a minimal extension of the Standard Model with a hidden sector charged under a dark local U(1)' gauge group, accounting simultaneously for light neutrino masses and the observed Dark Matter relic abundance. The model contains two copies of right-handed neutrinos which give rise to light neutrino-masses via an extended seesaw mechanism. The presence of a stable Dark-Matter candidate and a massless state naturally arise by requiring the simplest anomaly-free particle content without introducing any extra symmetries. We investigate the phenomenology of the hidden sector considering the U(1)' breaking scale of the order of the electroweak scale. Confronting the thermal history of this hidden-sector model with existing and future constraints from collider, direct and indirect detection experiments provides various possibilities of probing the model in complementary ways as every particle of the dark sector plays a specific cosmological role. Across the identified viable parameter space, a large region predicts a sizable contribution to the effective relativistic degrees-of-freedom in the early Universe that allows to alleviate the recently reported tension between late and early measurements of the Hubble constant.},
doi = {10.1007/JHEP02(2020)068},
journal = {Journal of High Energy Physics (Online)},
number = 2,
volume = 2020,
place = {United States},
year = {2020},
month = {2}
}

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