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 and . With unprecedented high energy resolution, the DAMPE data exhibit an excess of the CREs flux at an energy of around . 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 . 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:
- 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)
- OSTI Identifier:
- 1437823
- Alternate Identifier(s):
- OSTI ID: 1499149
- Grant/Contract Number:
- SC0013680; SC0013880
- Resource Type:
- Published Article
- Journal Name:
- Physics Letters B
- Additional Journal Information:
- Journal Name: Physics Letters B Journal Volume: 779 Journal Issue: C; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- 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. Netherlands: 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. Netherlands. https://doi.org/10.1016/j.physletb.2018.02.006
Li, Tong, Okada, Nobuchika, and Shafi, Qaisar. Sun .
"Scalar dark matter, type II seesaw and the DAMPE cosmic ray e++e− excess". Netherlands. https://doi.org/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 B},
number = C,
volume = 779,
place = {Netherlands},
year = {Sun Apr 01 00:00:00 EDT 2018},
month = {Sun Apr 01 00:00:00 EDT 2018}
}
https://doi.org/10.1016/j.physletb.2018.02.006
Web of Science
Figures / Tables:
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