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Title: Beyond minimal lepton-flavored Dark Matter

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [1]
  1. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division

In this paper ,we consider a class of flavored dark matter (DM) theories where dark matter interacts with the Standard Model lepton fields at the renormalizable level. We allow for a general coupling matrix between the dark matter and leptons whose structure is beyond the one permitted by the minimal flavor violation (MFV) assumption. It is assumed that this is the only new source of flavor violation in addition to the Standard Model (SM) Yukawa interactions. The setup can be described by augmenting the SM flavor symmetry by an additional SU(3)χ, under which the dark matter χ transforms. This framework is especially phenomenologically rich, due to possible novel flavor-changing interactions which are not present within the more restrictive MFV framework. As a representative case study of this setting, which we call “beyond MFV” (BMFV), we consider Dirac fermion dark matter which transforms as a singlet under the SM gauge group and a triplet under SU(3)χ. The DM fermion couples to the SM lepton sector through a scalar mediator Φ. Unlike the case of quark-flavored DM, we show that there is no Z3 symmetry within either the MFV or BMFV settings which automatically stabilizes the lepton-flavored DM. We discuss constraints on this setup from flavor-changing processes, DM relic abundance as well as direct and indirect detections. We find that relatively large flavor-changing couplings are possible, while the dark matter mass is still within the phenomenologically interesting region below the TeV scale. Collider signatures which can be potentially searched for at the lepton and hadron colliders are discussed. Finally, we discuss the implications for decaying dark matter, which can appear if an additional stabilizing symmetry is not imposed.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Univ. of California, Irvine, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
SC0009920; PHY-0970173; PHY-1066293
OSTI ID:
1335600
Report Number(s):
LA-UR-15-27938
Journal Information:
Journal of High Energy Physics (Online), Vol. 2016, Issue 2; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

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Cited By (11)

Lepton-flavor violating mediators journal March 2017
Casting a wide signal net with future direct dark matter detection experiments journal July 2018
Top-flavoured dark matter in Dark Minimal Flavour Violation journal May 2017
Dark sectors and enhanced h → τ μ transitions journal May 2017
Addressing astrophysical and cosmological problems with secretly asymmetric dark matter journal July 2019
Top-flavoured dark matter in Dark Minimal Flavour Violation text January 2017
Flavoured Dark Matter moving left text January 2018
Lepton-Flavor Violating Mediators text January 2016
Flavoured Dark Matter Moving Left text January 2017
Casting a Wide Signal Net with Future Direct Dark Matter Detection Experiments text January 2018
B-physics anomalies: The bridge between R-parity violating Supersymmetry and flavoured Dark Matter text January 2019

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