scholarly journals Gauge-Singlet Vector-Like Fermion Dark Matter, LHC Diphoton Rate, and Direct Detection

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
Shrihari Gopalakrishna ◽  
Tuhin Subhra Mukherjee
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Gluon Fusion ◽  
Gauge Bosons ◽  
Hidden Sector ◽  
Dark Matter Relic Density ◽  
Higgs Search ◽  
Matter Model ◽  
Higgs Portal ◽  
Dark Matter Model

We study a gauge-singlet vector-like fermion hidden sector dark matter model, in which the communication between the dark matter and the visible standard model sector is via the Higgs-portal scalar-Higgs mixing and also via a hidden sector scalar with loop-level couplings to two gluons and also to two hypercharge gauge bosons induced by a vector-like quark. We find that the Higgs-portal possibility is stringently constrained to be small by the recent LHC di-Higgs search limits, and the loop induced couplings are important to include. In the model parameter space, we present the dark matter relic density, the dark-matter-nucleon direct detection scattering cross section, the LHC diphoton rate from gluon-gluon fusion, and the theoretical upper bounds on the fermion-scalar couplings from perturbative unitarity.

scholarly journals Vector dark matter from split SU(2) gauge bosons

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Zexi Hu ◽  
Chengfeng Cai ◽  
Yi-Lei Tang ◽  
Zhao-Huan Yu ◽  
Hong-Hao Zhang
Keyword(s):  
Dark Matter ◽  
Gauge Group ◽  
Measurement Data ◽  
Indirect Detection ◽  
Gauge Bosons ◽  
Dark Matter Relic Density ◽  
Matter Model ◽  
Direct And Indirect Detection ◽  
Numerous Parameter ◽  
Dark Matter Model

Abstract We propose a vector dark matter model with an exotic dark SU(2) gauge group. Two Higgs triplets are introduced to spontaneously break the symmetry. All of the dark gauge bosons become massive, and the lightest one is a viable vector DM candidate. Its stability is guaranteed by a remaining Z2 symmetry. We study the parameter space constrained by the Higgs measurement data, the dark matter relic density, and direct and indirect detection experiments. We find numerous parameter points satisfying all the constraints, and they could be further tested in future experiments. Similar methodology can be used to construct vector dark matter models from an arbitrary SO(N) gauge group.

scholarly journals Search for $$ \mathrm{U}{(1)}_{L_{\mu }-{L}_{\tau }} $$ charged dark matter with neutrino telescope

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Kento Asai ◽  
Shohei Okawa ◽  
Koji Tsumura
Keyword(s):  
Dark Matter ◽  
Resonance Effect ◽  
Neutrino Telescope ◽  
Dirac Fermion ◽  
Dark Matter Relic Density ◽  
Relic Density ◽  
Matter Model ◽  
Model Independent ◽  
Model Characteristic ◽  
Dark Matter Model

Abstract We study a simple Dirac fermion dark matter model in $$ \mathrm{U}{(1)}_{L_{\mu }-{L}_{\tau }} $$ U 1 L μ − L τ theory. The new light gauge boson X plays important roles in both dark matter physics and the explanation for the muon g− 2 anomaly. The observed dark matter relic density is realized by a large $$ \mathrm{U}{(1)}_{L_{\mu }-{L}_{\tau }} $$ U 1 L μ − L τ charge without introducing a resonance effect of the X boson. As a by-product of the model, characteristic neutrino signatures from sub-GeV dark matter ψ are predicted depending on the mass spectrum. We formulate the analysis of $$ \psi \overline{\psi}\to \nu \overline{\nu} $$ ψ ψ ¯ → ν ν ¯ , and of $$ \psi \overline{\psi}\to XX $$ ψ ψ ¯ → XX followed by $$ X\to \nu \overline{\nu} $$ X → ν ν ¯ in a model independent way. The energy spectrum of neutrinos in the former process is monochromatic while in the latter process is bowl-shape. We also evaluate sensitivity at Super-Kamiokande and future Hyper-Kamiokande detectors. The analysis is finally applied to the $$ \mathrm{U}{(1)}_{L_{\mu }-{L}_{\tau }} $$ U 1 L μ − L τ dark matter model.

scholarly journals Collider probes of real triplet scalar dark matter

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Cheng-Wei Chiang ◽  
Giovanna Cottin ◽  
Yong Du ◽  
Kaori Fuyuto ◽  
Michael J. Ramsey-Musolf
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Hadron Collider ◽  
Mass Splitting ◽  
Dark Matter Candidate ◽  
Soft Pion ◽  
Dark Matter Relic Density ◽  
Pile Up ◽  
Higgs Portal ◽  
Scalar Sector

Abstract We study discovery prospects for a real triplet extension of the Standard Model scalar sector at the Large Hadron Collider (LHC) and a possible future 100 TeV pp collider. We focus on the scenario in which the neutral triplet scalar is stable and contributes to the dark matter relic density. When produced in pp collisions, the charged triplet scalar decays to the neutral component plus a soft pion or soft lepton pair, yielding a disappearing charged track in the detector. We recast current 13 TeV LHC searches for disappearing tracks, and find that the LHC presently excludes a real triplet scalar lighter than 248 (275) GeV, for a mass splitting of 172 (160) MeV with ℒ = 36 fb−1. The reach can extend to 497 (520) GeV with the collection of 3000 fb−1. We extrapolate the 13 TeV analysis to a prospective 100 TeV pp collider, and find that a ∼ 3 TeV triplet scalar could be discoverable with ℒ = 30 ab−1, depending on the degree to which pile up effects are under control. We also investigate the dark matter candidate in our model and corresponding present and prospective constraints from dark matter direct detection. We find that currently XENON1T can exclude a real triplet dark matter lighter than ∼ 3 TeV for a Higgs portal coupling of order one or larger, and the future XENON20T will cover almost the entire dark matter viable parameter space except for vanishingly small portal coupling.

scholarly journals Electroweak corrections to dark matter direct detection in a vector dark matter model

2019 ◽  
Vol 2019 (10) ◽  
Author(s):  
Seraina Glaus ◽  
Margarete Mühlleitner ◽  
Jonas Müller ◽  
Shruti Patel ◽  
Rui Santos
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Matter Model ◽  
Dark Matter Model ◽  
Electroweak Corrections

scholarly journals An update on the two singlet dark matter model

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Tanushree Basak ◽  
Baradhwaj Coleppa ◽  
Kousik Loho
Keyword(s):  
Dark Matter ◽  
Gamma Ray ◽  
Galactic Center ◽  
Direct Detection ◽  
Dark Matter Candidate ◽  
The Standard Model ◽  
Matter Model ◽  
Relic Abundance ◽  
Dark Matter Model

Abstract We revisit the two real singlet extension of the Standard Model with a $$ {Z}_2\times {Z}_2^{\prime } $$ Z 2 × Z 2 ′ symmetry. One of the singlet scalars S2, by virtue of an unbroken $$ {Z}_2^{\prime } $$ Z 2 ′ symmetry, plays the role of a stable dark matter candidate. The other scalar S1, with spontaneously broken Z2-symmetry, mixes with the SM Higgs boson and acts as the scalar mediator. We analyze the model by putting in the entire set of theoretical and recent experimental constraints. The latest bounds from direct detection Xenon1T experiment severely restricts the allowed region of parameter space of couplings. To ensure the dark matter satisfies the relic abundance criterion, we rely on the Breit-Wigner enhanced annihilation cross-section. Further, we study the viability of explaining the observed gamma-ray excess in the galactic center in this model with a dark matter of mass in the ∼ 36 − 51 GeV window and present our conclusions.

scholarly journals Shedding light on dark matter with recent muon (g − 2) and Higgs exotic decay measurements

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Chih-Ting Lu ◽  
Raymundo Ramos ◽  
Yue-Lin Sming Tsai
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Direct Detection ◽  
The Other ◽  
Atlas Collaboration ◽  
Beyond The Standard Model ◽  
Exotic Decay ◽  
The Standard Model ◽  
Matter Model ◽  
Dark Matter Model

Abstract Recently, we have witnessed two hints of physics beyond the standard model: a 3.3σ local excess ($$ {M}_{A_0} $$ M A 0 = 52 GeV) in the search for H0 → A0A0 → b$$ \overline{b} $$ b ¯ μ+μ− and a 4.2σ deviation from the SM prediction in the (g − 2)μ measurement. The first excess was found by the ATLAS collaboration using 139 fb−1 data at $$ \sqrt{s} $$ s = 13 TeV. The second deviation is a combination of the results from the Brookhaven E821 and the recently reported Fermilab E989 experiment. We attempt to explain these deviations in terms of a renormalizable simplified dark matter model. Inspired by the null signal result from dark matter (DM) direct detection, we interpret the possible new particle, A0, as a pseudoscalar mediator connecting DM and the standard model. On the other hand, a new vector-like muon lepton can explain these two excesses at the same time while contributing to the DM phenomenology.

scholarly journals Cosmological Simulation for Fuzzy Dark Matter Model

2019 ◽  
Vol 5 ◽  
Author(s):  
Jiajun Zhang ◽  
Hantao Liu ◽  
Ming-Chung Chu
Keyword(s):  
Dark Matter ◽  
Matter Model ◽  
Dark Matter Model
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