scholarly journals Mitigating direct detection bounds in non-minimal Higgs portal scalar dark matter models

2017 ◽  
Vol 2017 (10) ◽  
Author(s):  
Subhaditya Bhattacharya ◽  
Purusottam Ghosh ◽  
Tarak Nath Maity ◽  
Tirtha Sankar Ray
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Higgs Portal

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 Direct detection of Higgs–portal dark matter at the LHC

2013 ◽  
Vol 73 (6) ◽  
Author(s):  
Abdelhak Djouadi ◽  
Adam Falkowski ◽  
Yann Mambrini ◽  
Jérémie Quevillon
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Higgs Portal

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 Non-thermal production of pNGB dark matter and inflation

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Yoshihiko Abe ◽  
Takashi Toma ◽  
Koichi Yoshioka
Keyword(s):  
Dark Matter ◽  
Symmetry Breaking ◽  
Direct Detection ◽  
Goldstone Boson ◽  
Beyond The Standard Model ◽  
Dark Matter Mass ◽  
Wide Range ◽  
Single Field ◽  
Relic Abundance ◽  
Higgs Portal

Abstract A pseudo Nambu-Goldstone boson (pNGB) is a natural candidate of dark matter in that it avoids the severe direct detection bounds. We show in this paper that the pNGB has another different and interesting face with a higher symmetry breaking scale. Such large symmetry breaking is motivated by various physics beyond the standard model. In this case, the pNGB interaction is suppressed due to the Nambu-Goldstone property and the freeze-out production does not work even with sufficiently large portal coupling. We then study the pNGB dark matter relic abundance from the out-of-equilibrium production via feeble Higgs portal coupling. Further, a possibility is pursued the symmetry breaking scalar in the pNGB model plays the role of inflaton. The inflaton and dark matter are unified in a single field and the pNGB production from inflaton decay is inevitable. For these non-thermally produced relic abundance of pNGB dark matter and successful inflation, we find that the dark matter mass should be less than a few GeV in the wide range of the reheating temperature and the inflaton mass.

scholarly journals Inflation, proton decay, and Higgs-portal dark matter in $$SO(10) \times U(1)_\psi $$

2019 ◽  
Vol 79 (12) ◽  
Author(s):  
Nobuchika Okada ◽  
Digesh Raut ◽  
Qaisar Shafi
Keyword(s):  
Dark Matter ◽  
Symmetry Breaking ◽  
Direct Detection ◽  
Gauge Coupling ◽  
Higgs Field ◽  
Proton Decay ◽  
Grand Unified Theory ◽  
Seesaw Mechanism ◽  
Higgs Portal ◽  
Natural Scale

AbstractWe propose a simple non-supersymmetric grand unified theory (GUT) based on the gauge group $$SO(10) \times U(1)_\psi $$SO(10)×U(1)ψ. The model includes 3 generations of fermions in $$\mathbf{16}$$16 ($$+1$$+1), $$\mathbf{10}$$10 ($$-2$$-2) and $$\mathbf{1}$$1 ($$+4$$+4) representations. The $$\mathbf{16}$$16-plets contain Standard Model (SM) fermions plus right-handed neutrinos, and the $$\mathbf{10}$$10-plet and the singlet fermions are introduced to make the model anomaly-free. Gauge coupling unification at $$M_{GUT} \simeq 5 \times 10^{15}{-}10^{16}$$MGUT≃5×1015-1016 GeV is achieved by including an intermediate Pati–Salam breaking at $$M_{I} \simeq 10^{12}{-}10^{11}$$MI≃1012-1011 GeV, which is a natural scale for the seesaw mechanism. For $$M_{I} \simeq 10^{12}{-}10^{11}$$MI≃1012-1011, proton decay will be tested by the Hyper-Kamiokande experiment. The extra fermions acquire their masses from $$U(1)_\psi $$U(1)ψ symmetry breaking, and a $$U(1)_\psi $$U(1)ψ Higgs field drives a successful inflection-point inflation with a low Hubble parameter during inflation, $$H_{inf} \ll M_{I}$$Hinf≪MI. Hence, cosmologically dangerous monopoles produced from SO(10) and PS breakings are diluted away. This is the first SO(10) model we are aware of in which relatively light intermediate mass ($$\sim 10^{10}{-}10^{12}$$∼1010-1012 GeV) primordial monopoles can be adequately suppressed. The reheating temperature after inflation can be high enough for successful leptogenesis. With the Higgs field contents of our model, a $$\mathbf{Z}_2$$Z2 symmetry remains unbroken after GUT symmetry breaking, and the lightest mass eigenstate among linear combinations of the $$\mathbf{10}$$10-plet and the singlet fermions serves as a Higgs-portal dark matter (DM). We identify the parameter regions to reproduce the observed DM relic density while satisfying the current constraint from the direct DM detection experiments. The present allowed region will be fully covered by the future direct detection experiments such as LUX-ZEPLIN DM experiment. In the presence of the extra fermions, the SM Higgs potential is stabilized up to $$M_{I}$$MI.

scholarly journals 2HDM singlet portal to dark matter

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
M. E. Cabrera ◽  
J. A. Casas ◽  
A. Delgado ◽  
S. Robles
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Parameter Space ◽  
Direct Detection ◽  
Single Parameter ◽  
Relic Density ◽  
Relic Abundance ◽  
Higgs Portal ◽  
The Universe

Abstract Higgs portal models are the most minimal way to explain the relic abundance of the Universe. They add just a singlet that only couples to the Higgs through a single parameter that controls both the dark matter relic abundance and the direct detection cross-section. Unfortunately this scenario, either with scalar or fermionic dark matter, is almost ruled out by the latter. In this paper we analyze the Higgs-portal idea with fermionic dark matter in the context of a 2HDM. By disentangling the couplings responsible for the correct relic density from those that control the direct detection cross section we are able to open the parameter space and find wide regions consistent with both the observed relic density and all the current bounds.

scholarly journals Twin Higgs portal dark matter

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
David Curtin ◽  
Shayne Gryba
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Discrete Symmetry ◽  
Scalar Coupling ◽  
Minimal Models ◽  
Hierarchy Problem ◽  
Quartic Interaction ◽  
Little Hierarchy Problem ◽  
Higgs Portal ◽  
Scalar Sector

Abstract Many minimal models of dark matter (DM) or canonical solutions to the hierarchy problem are either excluded or severely constrained by LHC and direct detection null results. In particular, Higgs Portal Dark Matter (HPDM) features a scalar coupling to the Higgs via a quartic interaction, and obtaining the measured relic density via thermal freeze-out gives definite direct detection predictions which are now almost entirely excluded. The Twin Higgs solves the little hierarchy problem without coloured top partners by introducing a twin sector related to the Standard Model (SM) by a discrete symmetry. We generalize HPDM to arbitrary Twin Higgs models and introduce Twin Higgs Portal Dark Matter (THPDM), which features a DM candidate with an SU(4)-invariant quartic coupling to the Twin Higgs scalar sector. Given the size of quadratic corrections to the DM mass, its most motivated scale is near the mass of the radial mode. In that case, DM annihilation proceeds with the full Twin Higgs portal coupling, while direct detection is suppressed by the pNGB nature of the 125 GeV Higgs. For a standard cosmological history, this results in a predicted direct detection signal for THPDM that is orders of magnitude below that of HPDM with very little dependence on the precise details of the twin sector, evading current bounds but predicting possible signals at next generation experiments. In many Twin Higgs models, twin radiation contributions to ∆Neff are suppressed by an asymmetric reheating mechanism. We study this by extending the νMTH and X MTH models to include THPDM and compute the viable parameter space according to the latest CMB bounds. The injected entropy dilutes the DM abundance as well, resulting in additional suppression of direct detection below the neutrino floor.

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