TY - JOUR
T1 - Status of the scalar singlet dark matter model
AU - Athron, Peter
AU - Balázs, Csaba
AU - Bringmann, Torsten
AU - Buckley, Andy
AU - Chrząszcz, Marcin
AU - Conrad, Jan
AU - Cornell, Jonathan M.
AU - Dal, Lars A.
AU - Edsjö, Joakim
AU - Farmer, Ben
AU - Jackson, Paul
AU - Kahlhoefer, Felix
AU - Krislock, Abram
AU - Kvellestad, Anders
AU - McKay, James
AU - Mahmoudi, Farvah
AU - Martinez, Gregory D.
AU - Putze, Antje
AU - Raklev, Are
AU - Rogan, Christopher
AU - Saavedra, Aldo
AU - Savage, Christopher
AU - Scott, Pat
AU - Serra, Nicola
AU - Weniger, Christoph
AU - White, Martin
AU - The GAMBIT Collaboration
PY - 2017/8/1
Y1 - 2017/8/1
N2 - One of the simplest viable models for dark matter is an additional neutral scalar, stabilised by a Z2 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.
AB - One of the simplest viable models for dark matter is an additional neutral scalar, stabilised by a Z2 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.
UR - http://www.scopus.com/inward/record.url?scp=85028462926&partnerID=8YFLogxK
U2 - 10.1140/epjc/s10052-017-5113-1
DO - 10.1140/epjc/s10052-017-5113-1
M3 - Article
AN - SCOPUS:85028462926
VL - 77
JO - European Physical Journal C
JF - European Physical Journal C
SN - 1434-6052
IS - 8
M1 - 568
ER -