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Title: Z B L ' portal dark matter and LHC Run-2 results

Abstract

Here, we consider a concise dark matter scenario in the minimal gauged B-L extension of the Standard Model (SM), where the global B-L (baryon number minus lepton number) symmetry in the SM is gauged, and three generations of right-handed neutrinos and a B-L Higgs field are introduced. Associated with the B-L gauge symmetry breaking by a VEV of the B-L Higgs field, the seesaw mechanism for generating the neutrino mass is automatically implemented after the electroweak symmetry breaking in the SM. In this model context, we introduce a Z 2-parity and assign an odd parity for one right-handed neutrino while even parities for the other fields. Thus, the dark matter candidate is identified as the right-handed Majorana neutrino with odd Z 2 parity, keeping the minimality of the particle content intact. When the dark matter particle communicates with the SM particles mainly through the B-L gauge boson (Z' BL boson), its relic abundance is determined by only three free parameters, the B-L gauge coupling (α BL), the Z' BL boson mass (m Z') and the dark matter mass (m DM). With the cosmological upper bound on the dark matter relic abundance we find a lower bound on α BL asmore » a function of m Z'. On the other hand, we interpret the recent LHC Run-2 results on search for Z' boson resonance to an upper bound on α BL as a function of m Z'. By combining the two results we identify an allowed parameter region for this "Z' BL portal" dark matter scenario, which turns out to be a narrow window with the lower mass bound of m Z'>2.5 TeV.« less

Authors:
 [1];  [2]
  1. Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Physics adn Astronomy
  2. Yamagata Univ. (Japan). Graduate School of Science and Engineering
Publication Date:
Research Org.:
Univ. of Alabama, Tuscaloosa, AL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1365624
Grant/Contract Number:  
SC0013680
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 93; Journal Issue: 7; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Okada, Nobuchika, and Okada, Satomi. ZBL' portal dark matter and LHC Run-2 results. United States: N. p., 2016. Web. doi:10.1103/PhysRevD.93.075003.
Okada, Nobuchika, & Okada, Satomi. ZBL' portal dark matter and LHC Run-2 results. United States. doi:10.1103/PhysRevD.93.075003.
Okada, Nobuchika, and Okada, Satomi. Fri . "ZBL' portal dark matter and LHC Run-2 results". United States. doi:10.1103/PhysRevD.93.075003. https://www.osti.gov/servlets/purl/1365624.
@article{osti_1365624,
title = {ZBL' portal dark matter and LHC Run-2 results},
author = {Okada, Nobuchika and Okada, Satomi},
abstractNote = {Here, we consider a concise dark matter scenario in the minimal gauged B-L extension of the Standard Model (SM), where the global B-L (baryon number minus lepton number) symmetry in the SM is gauged, and three generations of right-handed neutrinos and a B-L Higgs field are introduced. Associated with the B-L gauge symmetry breaking by a VEV of the B-L Higgs field, the seesaw mechanism for generating the neutrino mass is automatically implemented after the electroweak symmetry breaking in the SM. In this model context, we introduce a Z2-parity and assign an odd parity for one right-handed neutrino while even parities for the other fields. Thus, the dark matter candidate is identified as the right-handed Majorana neutrino with odd Z2 parity, keeping the minimality of the particle content intact. When the dark matter particle communicates with the SM particles mainly through the B-L gauge boson (Z'BL boson), its relic abundance is determined by only three free parameters, the B-L gauge coupling (αBL), the Z'BL boson mass (mZ') and the dark matter mass (mDM). With the cosmological upper bound on the dark matter relic abundance we find a lower bound on αBL as a function of mZ'. On the other hand, we interpret the recent LHC Run-2 results on search for Z' boson resonance to an upper bound on αBL as a function of mZ'. By combining the two results we identify an allowed parameter region for this "Z'BL portal" dark matter scenario, which turns out to be a narrow window with the lower mass bound of mZ'>2.5 TeV.},
doi = {10.1103/PhysRevD.93.075003},
journal = {Physical Review D},
issn = {2470-0010},
number = 7,
volume = 93,
place = {United States},
year = {2016},
month = {4}
}

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    Works referencing / citing this record:

    Natural Z -portal Majorana dark matter in alternative U(1) extended standard model
    journal, August 2019


    The $$B-L$$ B - L scotogenic models for Dirac neutrino masses
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