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Status of the scalar singlet dark matter model

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Title: Status of the scalar singlet dark matter model
Authors: Athron, P
Balazs, C
Bringmann, T
Buckley, A
Chrzaszcz, M
Conrad, J
Cornell, JM
Dal, LA
Edsjo, J
Farmer, B
Jackson, P
Kahlhoefer, F
Krislock, A
Kvellestad, A
McKay, J
Mahmoudi, F
Martinez, GD
Putze, A
Raklev, A
Rogan, C
Saavedra, A
Savage, C
Scott, P
Serra, N
Weniger, C
White, M
Item Type: Journal Article
Abstract: One of the simplest viable models for dark matter is an additional neutral scalar, stabilised by a Z2Z2 symmetry. Using the GAMBIT package and combining results from four independent samplers, we present Bayesian and frequentist global fits of this model. We vary the singlet mass and coupling along with 13 nuisance parameters, including nuclear uncertainties relevant for direct detection, the local dark matter density, and selected quark masses and couplings. We include the dark matter relic density measured by Planck, direct searches with LUX, PandaX, SuperCDMS and XENON100, limits on invisible Higgs decays from the Large Hadron Collider, searches for high-energy neutrinos from dark matter annihilation in the Sun with IceCube, and searches for gamma rays from annihilation in dwarf galaxies with the Fermi-LAT. Viable solutions remain at couplings of order unity, for singlet masses between the Higgs mass and about 300 GeV, and at masses above ∼∼ 1 TeV. Only in the latter case can the scalar singlet constitute all of dark matter. Frequentist analysis shows that the low-mass resonance region, where the singlet is about half the mass of the Higgs, can also account for all of dark matter, and remains viable. However, Bayesian considerations show this region to be rather fine-tuned.
Issue Date: 23-Aug-2017
Date of Acceptance: 26-Jul-2017
URI: http://hdl.handle.net/10044/1/52716
DOI: https://dx.doi.org/10.1140/epjc/s10052-017-5113-1
ISSN: 1434-6044
Publisher: SPRINGER
Journal / Book Title: EUROPEAN PHYSICAL JOURNAL C
Volume: 77
Issue: 8
Copyright Statement: © 2017 The Author(s). Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Sponsor/Funder: Science and Technology Facilities Council (STFC)
European Commission
Science and Technology Facilities Council
Science and Technology Facilities Council (STFC)
Funder's Grant Number: ST/K00414X/1
H2020-MSCA-RISE-2015-691164
ST-N000838
ST/N000838/1
Keywords: Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
STANDARD MODEL
HIGGS-BOSON
MILKY-WAY
LHC
SEARCH
PARTICLE
CANDIDATES
EXTENSION
SOFTSUSY
0206 Quantum Physics
0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics
Nuclear & Particles Physics
Publication Status: Published
Open Access location: https://link.springer.com/content/pdf/10.1140/epjc/s10052-017-5113-1.pdf
Article Number: ARTN 568
Appears in Collections:Physics
Astrophysics



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