Athron Peter, Balázs Csaba, Bringmann Torsten, Buckley Andy, Chrząszcz Marcin, Conrad Jan, Cornell Jonathan M, Dal Lars A, Edsjö Joakim, Farmer Ben, Jackson Paul, Kahlhoefer Felix, Krislock Abram, Kvellestad Anders, McKay James, Mahmoudi Farvah, Martinez Gregory D, Putze Antje, Raklev Are, Rogan Christopher, Saavedra Aldo, Savage Christopher, Scott Pat, Serra Nicola, Weniger Christoph, White Martin
1School of Physics and Astronomy, Monash University, Melbourne, VIC 3800 Australia.
Australian Research Council Centre of Excellence for Particle Physics at the Tera-scale, Australia, http://www.coepp.org.au/.
Eur Phys J C Part Fields. 2017;77(8):568. doi: 10.1140/epjc/s10052-017-5113-1. Epub 2017 Aug 23.
One of the simplest viable models for dark matter is an additional neutral scalar, stabilised by a 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 , 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 -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.
暗物质最简单的可行模型之一是一个由对称性稳定的额外中性标量。使用GAMBIT软件包并结合四个独立采样器的结果，我们给出了该模型的贝叶斯和频率主义全局拟合。我们改变单重态质量和耦合，以及13个 nuisance 参数，包括与直接探测相关的核不确定性、当地暗物质密度以及选定的夸克质量和耦合。我们纳入了由……测量的暗物质遗迹密度、LUX、PandaX、SuperCDMS和XENON100的直接搜索结果、大型强子对撞机对希格斯玻色子不可见衰变的限制、利用冰立方探测器对太阳中暗物质湮灭产生的高能中微子的搜索，以及利用费米大面积望远镜对矮星系中湮灭产生的伽马射线的搜索。对于单重态质量在希格斯玻色子质量与约300 GeV之间以及质量高于1 TeV的情况，在耦合为单位量级时仍存在可行解。只有在后一种情况下，标量单重态才能构成全部暗物质。频率主义分析表明，单重态质量约为希格斯玻色子质量一半的低质量共振区域也能解释全部暗物质，并且仍然可行。然而，贝叶斯分析认为该区域存在相当程度的微调。
