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Title: Positive charge prevalence in cosmic rays: Room for dark matter in the positron spectrum

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1324862
Grant/Contract Number:
FG02-04ER54738
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 94; Journal Issue: 6; Related Information: CHORUS Timestamp: 2016-09-15 18:10:45; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Malkov, M. A., Diamond, P. H., and Sagdeev, R. Z. Positive charge prevalence in cosmic rays: Room for dark matter in the positron spectrum. United States: N. p., 2016. Web. doi:10.1103/PhysRevD.94.063006.
Malkov, M. A., Diamond, P. H., & Sagdeev, R. Z. Positive charge prevalence in cosmic rays: Room for dark matter in the positron spectrum. United States. doi:10.1103/PhysRevD.94.063006.
Malkov, M. A., Diamond, P. H., and Sagdeev, R. Z. 2016. "Positive charge prevalence in cosmic rays: Room for dark matter in the positron spectrum". United States. doi:10.1103/PhysRevD.94.063006.
@article{osti_1324862,
title = {Positive charge prevalence in cosmic rays: Room for dark matter in the positron spectrum},
author = {Malkov, M. A. and Diamond, P. H. and Sagdeev, R. Z.},
abstractNote = {},
doi = {10.1103/PhysRevD.94.063006},
journal = {Physical Review D},
number = 6,
volume = 94,
place = {United States},
year = 2016,
month = 9
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.94.063006

Citation Metrics:
Cited by: 1work
Citation information provided by
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  • We investigate the indirect signatures of the Higgs portal U(1){sub X} vector dark matter (VDM) X{sub μ} from both its pair annihilation and decay. The VDM is stable at renormalizable level by Z{sub 2} symmetry, and thermalized by Higgs-portal interactions. It can also decay by some nonrenormalizable operators with very long lifetime at cosmological time scale. If dim-6 operators for VDM decays are suppressed by 10{sup 16} GeV scale, the lifetime of VDM with mass ∼ 2 TeV is just right for explaining the positron excess in cosmic ray observed by PAMELA and AMS02 Collaborations. The VDM decaying into μ{supmore » +}μ{sup −} can fit the data, evading various constraints on cosmic rays. We give one UV-complete model as an example. This scenario for Higgs portal decaying VDM with mass around ∼ 2 TeV can be tested by DM direct search at XENON1T, and also at the future colliders by measuring the Higgs self-couplings.« less
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  • We present a dark matter extension of the minimal supersymmetric standard model to give the recent trend of the high energy positron spectrum of the PAMELA/HEAT experiments. If the trend is caused indeed by dark matter, the minimal supersymmetric standard model needs to be extended. Here, we minimally extend the minimal supersymmetric standard model with one more dark matter component N together with a heavy lepton E and introduce the coupling e{sub R}E{sub R}{sup c}N{sub R}. This coupling naturally appears in the flipped SU(5) grand unification models. We also present the needed parameter ranges of these additional particles.
  • Gravitational lensing observations of galaxy clusters have identified dark matter blobs with remarkably low baryonic content. We use such a blob to probe the particle nature of dark matter with x-ray observations. From these observations we improve the most conservative constraints from the Milky Way halo on a particular dark matter candidate, the sterile neutrino, by an order of magnitude. We also study high resolution x-ray grating spectra of a cluster of galaxies. Based on these conservative constraints obtained from cosmic x-ray observations alone, the low mass (m{sub s} < or approx.10 keV) and low mixing angle (sin{sup 2}(2{theta}) <more » or approx. 10{sup -6}) sterile neutrino is still a viable dark matter candidate.« less