scholarly journals Model-independent constraints with extended dark matter EFT

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Tommi Alanne ◽  
Giorgio Arcadi ◽  
Florian Goertz ◽  
Valentin Tenorth ◽  
Stefan Vogl
Keyword(s):  
Dark Matter ◽  
Parameter Space ◽  
Direct Detection ◽  
Vector Boson ◽  
Effective Field ◽  
Indirect Detection ◽  
Effective Theory ◽  
Dark Sector ◽  
Model Independent ◽  
Relic Abundance

Abstract We systematically explore the phenomenology of the recently proposed extended dark matter effective field theory (eDMeft), which allows for a consistent effective description of DM scenarios across different energy scales. The framework remains applicable at collider energies and is capable of reproducing the correct relic abundance by including a dynamical mediator particle to the dark sector, while maintaining correlations dictated by gauge invariance in a ‘model-independent’ way. Taking into account present and future constraints from direct- and indirect-detection experiments, from collider searches for missing energy and for scalar resonances in vector-boson, di-jet, and Higgs-pair final states, as well as from the relic abundance as measured by Planck, we determine viable regions in the parameter space, both for scalar and pseudoscalar mediator. In particular, we point out regions where cancellations in the direct-detection cross section appear leading to allowed islands for scalar mediators that could be missed in a naive simplified-model approach, but are present in the full D = 5 effective theory, as well as a general opening of the parameter space due to consistently considering all operators at a given mass dimension. Thus, canonical WIMP-like scenarios can survive even the next generation of direct-detection experiments in different mass regimes, while potentially becoming testable at the high-luminosity LHC.

scholarly journals Effective field theory analysis of dark matter-standard model interactions with spin one mediators

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Fabiola Fortuna ◽  
Pablo Roig ◽  
José Wudka
Keyword(s):  
Field Theory ◽  
Dark Matter ◽  
Standard Model ◽  
Effective Field Theory ◽  
Gamma Ray ◽  
Direct Detection ◽  
Effective Field ◽  
Indirect Detection ◽  
Theory Analysis ◽  
Invisible Decay

Abstract We analyze interactions between dark matter and standard model particles with spin one mediators in an effective field theory framework. In this paper, we are considering dark particles masses in the range from a few MeV to the mass of the Z boson. We use bounds from different experiments: Z invisible decay width, relic density, direct detection experiments, and indirect detection limits from the search of gamma-ray emissions and positron fluxes. We obtain solutions corresponding to operators with antisymmetric tensor mediators that fulfill all those requirements within our approach.

scholarly journals Effective Theory Approach to Direct Detection of Dark Matter

2020 ◽  
pp. 650-688
Author(s):  
Junji Hisano
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Particle Physics ◽  
Direct Detection ◽  
Effective Field ◽  
Weakly Interacting Massive Particles ◽  
Effective Theory ◽  
Beyond The Standard Model ◽  
Theory Approach ◽  
The Standard Model

It is now certain that dark matter exists in the Universe. However, we do not know its nature, nor are there dark matter candidates in the standard model of particle physics or astronomy However, weakly interacting massive particles (WIMPs) in models beyond the standard model are one of the leading candidates available to provide explanation. The dark matter direct detection experiments, in which the nuclei recoiled by WIMPs are sought, are one of the methods to elucidate the nature of dark matter. This chapter introduces an effective field theory (EFT) approach in order to evaluate the nucleon–WIMP elastic scattering cross section.

scholarly journals Collider constraints on dark mediators

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Hanna Mies ◽  
Christiane Scherb ◽  
Pedro Schwaller
Keyword(s):  
Dark Matter ◽  
Parameter Space ◽  
First Generation ◽  
Direct Detection ◽  
Full Range ◽  
Dark Matter Candidate ◽  
Dark Sector ◽  
Missing Energy ◽  
First Time

Abstract We explore the constraints current collider searches place on a QCD-like dark sector. A combination of multi-jet, multi-jet plus missing energy and emerging jets searches is used to derive constraints on the mediator mass across the full range of the dark meson lifetimes for the first time.The dark sector inherits a flavour structure from the coupling between the dark quarks and the SM quarks through the mediator. When this is taken into account, the differently flavoured dark pions become distinguishable through their lifetime. We show that also in these cases the above mentioned searches remain sensitive, and we obtain limits on the mediator mass also for the flavoured scenario.We then contrast the constraints from collider searches with direct detection bounds on the dark matter candidate itself in both the flavoured and unflavoured scenario. Using a simple prescription it becomes possible to display all constraints in the dark matter and mediator mass plane. Constraints from direct detection tend to be stronger than the collider constraints, unless the coupling to the first generation quarks is suppressed, in which case the collider searches place the most stringent limits on the parameter space.

scholarly journals Stealth decaying spin-1 dark matter

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Cédric Delaunay ◽  
Teng Ma ◽  
Yotam Soreq
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Direct Detection ◽  
Gauge Coupling ◽  
Indirect Detection ◽  
Cosmological Time ◽  
Electron Neutrinos ◽  
The Standard Model ◽  
Lepton Decays ◽  
Relic Abundance

Abstract We consider models of decaying spin-1 dark matter whose dominant coupling to the standard model sector is through a dark-Higgs Yukawa portal connecting a TeV-scale vector-like lepton to the standard model (right-handed) electron. Below the electron-positron threshold, dark matter has very slow, loop-suppressed decays to photons and (electron) neutrinos, and is stable on cosmological time-scale for sufficiently small gauge coupling values. Its relic abundance is set by in-equilibrium dark lepton decays, through the freeze-in mechanism. We show that this model accommodates the observed dark matter abundance for natural values of its parameters and a dark matter mass in the ∼ 5 keV to 1 MeV range, while evading constraints from direct detection, indirect detection, stellar cooling and cosmology. We also consider the possibility of a nonzero gauge kinetic mixing with the standard model hypercharge field, which is found to yield a mild impact on the model’s phenomenology.

scholarly journals Fermion singlet dark matter in a pseudoscalar dark matter portal

2021 ◽  
Vol 2021 (10) ◽  
Author(s):  
Bastián Díaz Sáez ◽  
Patricio Escalona ◽  
Sebastián Norero ◽  
Alfonso Zerwekh
Keyword(s):  
Dark Matter ◽  
Parameter Space ◽  
Indirect Detection ◽  
Dirac Fermion ◽  
Simple Extension ◽  
Higgs Decay ◽  
The Standard Model ◽  
Matter Model ◽  
Relic Abundance ◽  
Dark Matter Model

Abstract We explore a simple extension to the Standard Model containing two gauge singlets: a Dirac fermion and a real pseudoscalar. In some regions of the parameter space both singlets are stable without the necessity of additional symmetries, then becoming a possible two-component dark matter model. We study the relic abundance production via freeze-out, with the latter determined by annihilations, conversions and semi-annihilations. Experimental constraints from invisible Higgs decay, dark matter relic abundance and direct/indirect detection are studied. We found three viable regions of the parameter space, and the model is sensitive to indirect searches.

scholarly journals Exploring direct detection suppressed regions in a simple 2-scalar mediator model of scalar dark matter

2021 ◽  
Vol 81 (5) ◽  
Author(s):  
Jérôme Claude ◽  
Stephen Godfrey
Keyword(s):  
Dark Matter ◽  
Simple Model ◽  
Standard Model ◽  
Parameter Space ◽  
Cross Sections ◽  
Direct Detection ◽  
Detection Limits ◽  
Interference Effects ◽  
The Standard Model ◽  
Relic Abundance

AbstractWe explore regions of parameter space that give rise to suppressed direct detection cross sections in a simple model of scalar dark matter with a scalar portal that mixes with the standard model Higgs. We found that even this simple model allows considerable room in the parameter space that has not been excluded by direct detection limits. A number of effects leading to this result have been previously noted. Our main new result explores interference effects between different contributions to DM annihilation when the DM mass is larger than the scalar portal mass. New annihilation channels open up and the parameters of the model need to compensate to give the correct DM relic abundance, resulting in smaller direct detection cross sections. We find that even in a very simple model of DM there are still sizeable regions of parameter space that are not ruled out by experiment.

scholarly journals Heavy dark matter through the dilaton portal

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Benjamin Fuks ◽  
Mark D. Goodsell ◽  
Dong Woo Kang ◽  
Pyungwon Ko ◽  
Seung J. Lee ◽  
...  
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Effective Field ◽  
Matter Density ◽  
Field Theories ◽  
Majorana Fermion ◽  
Dark Sector ◽  
Gauge Invariant ◽  
Matter Production ◽  
Invariant Formulation

Abstract We re-examine current and future constraints on a heavy dilaton coupled to a simple dark sector consisting of a Majorana fermion or a Stückelberg vector field. We include three different treatments of dilaton-Higgs mixing, paying particular attention to a gauge-invariant formulation of the model. Moreover, we also invite readers to re-examine effective field theories of vector dark matter, which we show are missing important terms. Along with the latest Higgs coupling data, heavy scalar search results, and dark matter density/direct detection constraints, we study the LHC bounds on the model and estimate the prospects of dark matter production at the future HL-LHC and 100 TeV FCC colliders. We additionally compute novel perturbative unitarity constraints involving vector dark matter, dilaton and gluon scattering.

scholarly journals Freeze-in dark matter from secret neutrino interactions

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Yong Du ◽  
Fei Huang ◽  
Hao-Lin Li ◽  
Jiang-Hao Yu
Keyword(s):  
Dark Matter ◽  
Indirect Detection ◽  
Small Scale ◽  
Dark Sector ◽  
Neutrino Interactions ◽  
Hidden Sector ◽  
Light Scalar ◽  
History Of ◽  
Structure Problem ◽  
Relic Abundance

Abstract We investigate a simplified freeze-in dark-matter model in which the dark matter only interacts with the standard-model neutrinos via a light scalar. The extremely small coupling for the freeze-in mechanism is naturally realized in several neutrino-portal scenarios with the secret neutrino interactions. We study possible evolution history of the hidden sector: the dark sector would undergo pure freeze-in production if the interactions between the dark-sector particles are negligible, while thermal equilibrium within the dark sector could occur if the reannihilation of the dark matter and the scalar mediator is rapid enough. We investigate the relic abundance in the freeze-in and dark freeze-out regimes, calculate evolution of the dark temperature, and study its phenomenological aspects on BBN and CMB constraints, the indirect-detection signature, as well as the potential to solve the small scale structure problem.

scholarly journals Phenomenology of scotogenic scalar dark matter

2020 ◽  
Vol 80 (10) ◽  
Author(s):  
Ivania M. Ávila ◽  
Valentina De Romeri ◽  
Laura Duarte ◽  
José W. F. Valle
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Mass Range ◽  
Indirect Detection ◽  
Mass Generation ◽  
Dark Matter Mass ◽  
Direct And Indirect Detection ◽  
Neutrino Mass Generation ◽  
Relic Abundance ◽  
Near Future

AbstractWe reexamine the minimal Singlet $$+$$ + Triplet Scotogenic Model, where dark matter is the mediator of neutrino mass generation. We assume it to be a scalar WIMP, whose stability follows from the same $${\mathbb {Z}}_{2}$$ Z 2 symmetry that leads to the radiative origin of neutrino masses. The scheme is the minimal one that allows for solar and atmospheric mass scales to be generated. We perform a full numerical analysis of the signatures expected at dark matter as well as collider experiments. We identify parameter regions where dark matter predictions agree with theoretical and experimental constraints, such as neutrino oscillations, Higgs data, dark matter relic abundance and direct detection searches. We also present forecasts for near future direct and indirect detection experiments. These will further probe the parameter space. Finally, we explore collider signatures associated with the mono-jet channel at the LHC, highlighting the existence of a viable light dark matter mass range.

scholarly journals Feebly coupled vector boson dark matter in effective theory

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Basabendu Barman ◽  
Subhaditya Bhattacharya ◽  
Bohdan Grzadkowski
Keyword(s):  
Dark Matter ◽  
Field Strength ◽  
Vector Boson ◽  
Hadron Collider ◽  
New Physics ◽  
Effective Theory ◽  
Dark Sector ◽  
The Standard Model ◽  
Strength Tensor ◽  
The Universe

Abstract A model of dark matter (DM) that communicates with the Standard Model (SM) exclusively through suppressed dimension five operator is discussed. The SM is augmented with a symmetry U(1)X ⊗ Z2, where U(1)X is gauged and broken spontaneously by a very heavy decoupled scalar. The massive U(1)X vector boson (Xμ) is stabilized being odd under unbroken Z2 and therefore may contribute as the DM component of the universe. Dark sector field strength tensor Xμν couples to the SM hypercharge tensor Bμν via the presence of a heavier Z2 odd real scalar Φ, i.e. 1/Λ XμνBμνΦ, with Λ being a scale of new physics. The freeze-in production of the vector boson dark matter feebly coupled to the SM is advocated in this analysis. Limitations of the so-called UV freeze-in mechanism that emerge when the maximum reheat temperature TRH drops down close to the scale of DM mass are discussed. The parameter space of the model consistent with the observed DM abundance is determined. The model easily and naturally avoids both direct and indirect DM searches. Possibility for detection at the Large Hadron Collider (LHC) is also considered. A Stueckelberg formulation of the model is derived.

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