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Title: Coscattering/coannihilation dark matter in a fraternal twin Higgs model

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [2]
  1. Univ. of California, Davis, CA (United States). Dept. of Physics; School of Natural Sciences, Inst. for Advanced Study, Princeton, NJ (United States)
  2. Univ. of California, Davis, CA (United States). Dept. of Physics

Dark matter candidates arise naturally in many models that address the hierarchy problem. In the fraternal twin Higgs model which could explain the absence of the new physics signals at the Large Hadron Collider (LHC), there are several viable dark matter candidates. In this paper we study the twin neutrino in the mass range ~0.1-10 GeV as the dark matter. The thermal relic density is determined by the interplay of several annihilation and scattering processes between the twin neutrino, twin tau, and twin photon, depending on the order of the freeze-out temperatures of these processes. Besides the common coannihilation scenario where the relic density is controlled by the twin tau annihilation, it can realize the recently discovered coscattering phase if the scattering of the twin neutrino into the twin tau freezes out earlier than the twin tau annihilation. We also provide a method to calculate the thermal relic density in the intermediate regime where both coannihilation and coscattering processes contribute to the determination of the dark matter density. We show that the right amount of dark matter can be obtained in various scenarios in different regions of the parameter space. The current experimental constraints and future probes into the parameter space from direct detections, cosmological and astrophysical bounds, dark photon searches, and displaced decays at colliders, are discussed.

Research Organization:
Univ. of California, Davis, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0009999
OSTI ID:
1505827
Journal Information:
Journal of High Energy Physics (Online), Vol. 2018, Issue 9; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (16)

Breaking mirror twin hypercharge journal December 2019
Discovering the twin Higgs boson with displaced decays journal April 2019
Physics beyond colliders at CERN: beyond the Standard Model working group report text January 2020
Singleton portals to the twin sector journal May 2019
Insight into primordial magnetic fields from 21-cm line observation with EDGES experiment journal July 2019
Physics beyond colliders at CERN: beyond the Standard Model working group report journal December 2019
Detecting hidden sector dark matter at HL-LHC and HE-LHC via long-lived stau decays journal March 2019
Detecting and studying high-energy collider neutrinos with FASER at the LHC: FASER Collaboration journal January 2020
Physics Beyond Colliders at CERN: Beyond the Standard Model Working Group Report text January 2019
Singleton Portals to the Twin Sector text January 2018
Collider signals of the Mirror Twin Higgs boson through the hypercharge portal journal August 2019
Singleton portals to the twin sector text January 2019
Discovering the Twin Higgs Boson with Displaced Decays text January 2018
Detecting hidden sector dark matter at HL-LHC and HE-LHC via long-lived stau decays text January 2019
Breaking Mirror Twin Hypercharge text January 2019
Signatures of Mirror Stars text January 2019

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