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Title: Scalar dark matter, type II seesaw and the DAMPE cosmic ray e + + e - excess

Abstract

The DArk Matter Particle Explorer (DAMPE) has reported a measurement of the flux of high energy cosmic ray electrons plus positrons (CREs) in the energy range between 25 GeV and 4.6 TeV . With unprecedented high energy resolution, the DAMPE data exhibit an excess of the CREs flux at an energy of around 1.4 TeV . In this letter, we discuss how the observed excess can be understood in a minimal framework where the Standard Model (SM) is supplemented by a stable SM singlet scalar as dark matter (DM) and type II seesaw for generating the neutrino mass matrix. In our framework, a pair of DM particles annihilates into a pair of the SM SU(2) triplet scalars (Δs) in type II seesaw, and the subsequent Δ decays create the primary source of the excessive CREs around 1.4 TeV . The lepton flavor structure of the primary source of CREs has a direct relation with the neutrino oscillation data. We find that the DM interpretation of the DAMPE excess determines the pattern of neutrino mass spectrum to be the inverted hierarchy type, taking into account the constraints from the Fermi-LAT observations of dwarf spheroidal galaxies.

Authors:
 [1];  [2];  [3]
  1. Nankai Univ., Tianjin (China). School of Physics; Monash Univ., Melbourne, VIC (Australia). ARC Centre of Excellence for Particle Physics at the Terascale. School of Physics and Astronomy
  2. Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Physics and Astronomy
  3. Univ. of Delaware, Newark, DE (United States). Bartol Research Inst. Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Univ. of Alabama, Tuscaloosa, AL (United States); Univ. of Delaware, Newark, DE (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1437823
Alternate Identifier(s):
OSTI ID: 1499149
Grant/Contract Number:  
SC0013680; SC0013880
Resource Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 779; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Li, Tong, Okada, Nobuchika, and Shafi, Qaisar. Scalar dark matter, type II seesaw and the DAMPE cosmic ray e+ + e- excess. United States: N. p., 2018. Web. doi:10.1016/j.physletb.2018.02.006.
Li, Tong, Okada, Nobuchika, & Shafi, Qaisar. Scalar dark matter, type II seesaw and the DAMPE cosmic ray e+ + e- excess. United States. doi:10.1016/j.physletb.2018.02.006.
Li, Tong, Okada, Nobuchika, and Shafi, Qaisar. Tue . "Scalar dark matter, type II seesaw and the DAMPE cosmic ray e+ + e- excess". United States. doi:10.1016/j.physletb.2018.02.006.
@article{osti_1437823,
title = {Scalar dark matter, type II seesaw and the DAMPE cosmic ray e+ + e- excess},
author = {Li, Tong and Okada, Nobuchika and Shafi, Qaisar},
abstractNote = {The DArk Matter Particle Explorer (DAMPE) has reported a measurement of the flux of high energy cosmic ray electrons plus positrons (CREs) in the energy range between 25GeV and 4.6TeV. With unprecedented high energy resolution, the DAMPE data exhibit an excess of the CREs flux at an energy of around 1.4TeV. In this letter, we discuss how the observed excess can be understood in a minimal framework where the Standard Model (SM) is supplemented by a stable SM singlet scalar as dark matter (DM) and type II seesaw for generating the neutrino mass matrix. In our framework, a pair of DM particles annihilates into a pair of the SM SU(2) triplet scalars (Δs) in type II seesaw, and the subsequent Δ decays create the primary source of the excessive CREs around 1.4TeV. The lepton flavor structure of the primary source of CREs has a direct relation with the neutrino oscillation data. We find that the DM interpretation of the DAMPE excess determines the pattern of neutrino mass spectrum to be the inverted hierarchy type, taking into account the constraints from the Fermi-LAT observations of dwarf spheroidal galaxies.},
doi = {10.1016/j.physletb.2018.02.006},
journal = {Physics Letters. Section B},
number = ,
volume = 779,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2018.02.006

Citation Metrics:
Cited by: 14 works
Citation information provided by
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