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Title: Dark Matter and the elusive Z' in a dynamical Inverse Seesaw scenario

Abstract

The Inverse Seesaw naturally explains the smallness of neutrino masses via an approximate $B-L$ symmetry broken only by a correspondingly small parameter. In this work the possible dynamical generation of the Inverse Seesaw neutrino mass mechanism from the spontaneous breaking of a gauged $U(1)$ $B-L$ symmetry is investigated. Interestingly, the Inverse Seesaw pattern requires a chiral content such that anomaly cancellation predicts the existence of extra fermions belonging to a dark sector with large, non-trivial, charges under the $U(1)$ $B-L$. We investigate the phenomenology associated to these new states and find that one of them is a viable dark matter candidate with mass around the TeV scale, whose interaction with the Standard Model is mediated by the $Z'$ boson associated to the gauged $U(1)$ $B-L$ symmetry. Given the large charges required for anomaly cancellation in the dark sector, the $B-L$ $Z'$ interacts preferentially with this dark sector rather than with the Standard Model. This suppresses the rate at direct detection searches and thus alleviates the constraints on $Z'$-mediated dark matter relic abundance. Furthermore, the collider phenomenology of this elusive $Z'$ is also discussed.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2];  [3]; ORCiD logo [4]
  1. C.S.I.C./Univ. de Valencia, Paterna (Spain)
  2. Univ. Autonoma de Madrid, Madrid (Spain); Instituto de Fisica Teorica UAM/CSIC, Madrid (Spain)
  3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  4. Ruprecht-Karls-Univ. Heidelberg, Heidelberg (Germany)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1376076
Report Number(s):
FERMILAB-PUB-17-285-T; FTUAM-17-14; IFT-UAM-CSIC-17-070; arXiv:1707.08606
Journal ID: ISSN 1029-8479; 1613331
Grant/Contract Number:  
AC02-07CH11359
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: 2017; Journal Issue: 10; 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; Neutrino Physics

Citation Formats

De Romeri, Valentina, Fernandez-Martinez, Enrique, Gehrlein, Julia, Machado, Pedro A. N., and Niro, Viviana. Dark Matter and the elusive Z' in a dynamical Inverse Seesaw scenario. United States: N. p., 2017. Web. doi:10.1007/JHEP10(2017)169.
De Romeri, Valentina, Fernandez-Martinez, Enrique, Gehrlein, Julia, Machado, Pedro A. N., & Niro, Viviana. Dark Matter and the elusive Z' in a dynamical Inverse Seesaw scenario. United States. doi:10.1007/JHEP10(2017)169.
De Romeri, Valentina, Fernandez-Martinez, Enrique, Gehrlein, Julia, Machado, Pedro A. N., and Niro, Viviana. Tue . "Dark Matter and the elusive Z' in a dynamical Inverse Seesaw scenario". United States. doi:10.1007/JHEP10(2017)169. https://www.osti.gov/servlets/purl/1376076.
@article{osti_1376076,
title = {Dark Matter and the elusive Z' in a dynamical Inverse Seesaw scenario},
author = {De Romeri, Valentina and Fernandez-Martinez, Enrique and Gehrlein, Julia and Machado, Pedro A. N. and Niro, Viviana},
abstractNote = {The Inverse Seesaw naturally explains the smallness of neutrino masses via an approximate $B-L$ symmetry broken only by a correspondingly small parameter. In this work the possible dynamical generation of the Inverse Seesaw neutrino mass mechanism from the spontaneous breaking of a gauged $U(1)$ $B-L$ symmetry is investigated. Interestingly, the Inverse Seesaw pattern requires a chiral content such that anomaly cancellation predicts the existence of extra fermions belonging to a dark sector with large, non-trivial, charges under the $U(1)$ $B-L$. We investigate the phenomenology associated to these new states and find that one of them is a viable dark matter candidate with mass around the TeV scale, whose interaction with the Standard Model is mediated by the $Z'$ boson associated to the gauged $U(1)$ $B-L$ symmetry. Given the large charges required for anomaly cancellation in the dark sector, the $B-L$ $Z'$ interacts preferentially with this dark sector rather than with the Standard Model. This suppresses the rate at direct detection searches and thus alleviates the constraints on $Z'$-mediated dark matter relic abundance. Furthermore, the collider phenomenology of this elusive $Z'$ is also discussed.},
doi = {10.1007/JHEP10(2017)169},
journal = {Journal of High Energy Physics (Online)},
number = 10,
volume = 2017,
place = {United States},
year = {2017},
month = {10}
}

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Cited by: 5 works
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