Global fit of pseudo-Nambu-Goldstone Dark Matter

被引：29

作者：

Arina, Chiara ^{[1
]}

Beniwal, Ankit ^{[1
]}

Degrande, Celine ^{[1
]}

Heisig, Jan ^{[1
]}

Scaffidi, Andre ^{[2
,3
]}

机构：

[1] Catholic Univ Louvain, Ctr Cosmol Particle Phys & Phenomenol CP3, B-1348 Louvain La Neuve, Belgium

[2] Univ Adelaide, ARC Ctr Excellence Particle Phys Terascale CoEPP, Adelaide, SA 5005, Australia

[3] Univ Adelaide, CSSM, Dept Phys, Adelaide, SA 5005, Australia

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2020年 / 2020卷 / 04期

关键词：

Beyond Standard Model; Dark matter; Dark Matter and Double Beta Decay (experiments); Higgs physics; BAYESIAN-INFERENCE; CP CONSERVATION; PHYSICS; SIGNAL; LEVEL; MODEL;

D O I：

10.1007/JHEP04(2020)015

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We perform a global fit within the pseudo-Nambu-Goldstone Dark Matter (DM) model emerging from an additional complex scalar singlet with a softly broken global U (1) symmetry. Leading to a momentum-suppressed DM-nucleon cross section at tree level, the model provides a natural explanation for the null results from direct detection experiments. Our global fit combines constraints from perturbative unitarity, DM relic abundance, Higgs invisible decay, electroweak precision observables and latest Higgs searches at colliders. The results are presented in both frequentist and Bayesian statisical frameworks. Furthermore, post-processing our samples, we include the likelihood from gamma-ray observations of Fermi -LAT dwarf spheroidal galaxies and compute the one-loop DM-nucleon cross section. We find two favoured regions characterised by their dominant annihilation channel: the Higgs funnel and annihilation into Higgs pairs. Both are compatible with current Fermi -LAT observations, and furthermore, can fit the slight excess observed in four dwarfs in a mass range between about 30-300 GeV. While the former region is hard to probe experimentally, the latter can partly be tested by current observations of cosmic-ray antiprotons as well as future gamma-ray observations.

引用

页数：36

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