scholarly journals Testing freeze-in with axial and vector Z′ bosons

2021 ◽  
Vol 2021 (9) ◽  
Author(s):  
Catarina Cosme ◽  
Maíra Dutra ◽  
Stephen Godfrey ◽  
Taylor Gray
Keyword(s):  
Dark Matter ◽  
Electron Scattering ◽  
Parity Violation ◽  
Direct Detection ◽  
Magnetic Moments ◽  
Z Bosons ◽  
Massive Particle ◽  
Resonance Region ◽  
Low Mass

Abstract The freeze-in production of Feebly Interacting Massive Particle (FIMP) dark matter in the early universe is an appealing alternative to the well-known — and constrained — Weakly Interacting Massive Particle (WIMP) paradigm. Although challenging, the phenomenology of FIMP dark matter has been receiving growing attention and is possible in a few scenarios. In this work, we contribute to this endeavor by considering a Z′ portal to fermionic dark matter, with the Z′ having both vector and axial couplings and a mass ranging from MeV up to PeV. We evaluate the bounds on both freeze-in and freeze-out from direct detection, atomic parity violation, leptonic anomalous magnetic moments, neutrino-electron scattering, collider, and beam dump experiments. We show that FIMPs can already be tested by most of these experiments in a complementary way, whereas WIMPs are especially viable in the Z′ low mass regime, in addition to the Z′ resonance region. We also discuss the role of the axial couplings of Z′ in our results. We therefore hope to motivate specific realizations of this model in the context of FIMPs, as well as searches for these elusive dark matter candidates.

scholarly journals Constraints on general neutrino interactions with exotic fermion from neutrino-electron scattering experiments

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Zikang Chen ◽  
Tong Li ◽  
Jiajun Liao
Keyword(s):  
Dark Matter ◽  
Electron Scattering ◽  
Direct Detection ◽  
Mass Region ◽  
Coupling Coefficients ◽  
Neutrino Scattering ◽  
Neutrino Interactions ◽  
Dipole Interactions ◽  
Low Mass ◽  
Bound Electron

Abstract The couplings between the neutrinos and exotic fermion can be probed in both neutrino scattering experiments and dark matter direct detection experiments. We present a detailed analysis of the general neutrino interactions with an exotic fermion and electrons at neutrino-electron scattering experiments. We obtain the constraints on the coupling coefficients of the scalar, pseudoscalar, vector, axialvector, tensor and electromagnetic dipole interactions from the CHARM-II, TEXONO and Borexino experiments. For the flavor-universal interactions, we find that the Borexino experiment sets the strongest bounds in the low mass region for the electromagnetic dipole interactions, and the CHARM-II experiment dominates the bounds for other scenarios. If the interactions are flavor dependent, the bounds from the CHARM-II or TEXONO experiment can be avoided, and there are correlations between the flavored coupling coefficients for the Borexino experiment. We also discuss the detection of sub-MeV DM absorbed by bound electron targets and illustrate that the vector coefficients preferred by XENON1T data are allowed by the neutrino-electron scattering experiments.

scholarly journals The Role of Small Scale Experiments in the Direct Detection of Dark Matter

Universe ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 81
Author(s):  
Susana Cebrián
Keyword(s):  
Dark Matter ◽  
New Technologies ◽  
Direct Detection ◽  
Detection Methods ◽  
Small Scale ◽  
Detection Systems ◽  
Relevant Role ◽  
Low Mass ◽  
Complex Detection

In the direct detection of the galactic dark matter, experiments using cryogenic solid-state detectors or noble liquids play for years a very relevant role, with increasing target mass and more and more complex detection systems. But smaller projects, based on very sensitive, advanced detectors following new technologies, could help in the exploration of the different proposed dark matter scenarios too. There are experiments focused on the observation of distinctive signatures of dark matter, like an annual modulation of the interaction rates or the directionality of the signal; other ones are intended to specifically investigate low mass dark matter candidates or particular interactions. For this kind of dark matter experiments at small scale, the physics case will be discussed and selected projects will be described, summarizing the basics of their detection methods and presenting their present status, recent results and prospects.

scholarly journals WIMP cogenesis for asymmetric dark matter and the baryon asymmetry

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Yanou Cui ◽  
Michael Shamma
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Massive Particle ◽  
Decay Chain ◽  
Baryon Number ◽  
High Energy ◽  
Baryon Asymmetry ◽  
Unified Framework ◽  
Low Mass ◽  
Asymmetric Dark Matter

Abstract We propose a new mechanism where asymmetric dark matter (ADM) and the baryon asymmetry are both generated in the same decay chain of a metastable weakly interacting massive particle (WIMP) after its thermal freezeout. Dark matter and baryons are connected by a generalized baryon number that is conserved, while the DM asymmetry and baryon asymmetry compensate each other. This unified framework addresses the DM-baryon coincidence while inheriting the merit of the conventional WIMP miracle in predicting relic abundances of matter. Examples of renormalizable models realizing this scenario are presented. These models generically predict ADM with sub-GeV to GeV-scale mass that interacts with Standard Model quarks or leptons, thus rendering potential signatures at direct detection experiments sensitive to low mass DM. Other interesting phenomenological predictions are also discussed, including: LHC signatures of new intermediate particles with color or electroweak charge and DM induced nucleon decay; the long-lived WIMP may be within reach of future high energy collider experiments.

scholarly journals Direct detection of supersymmetric dark matter and the role of the target nucleus spin

1994 ◽  
Vol 50 (12) ◽  
pp. 7128-7143 ◽  
Author(s):  
V. A. Bednyakov ◽  
H. V. Klapdor-Kleingrothaus ◽  
S. G. Kovalenko
Keyword(s):  
Dark Matter ◽  
Target Nucleus ◽  
Direct Detection

Searching for Dark Matter: Background Discrimination in the PICO detector

2018 ◽  
Author(s):  
Simon Daley
Keyword(s):  
Dark Matter ◽  
Image Analysis ◽  
Direct Detection ◽  
Pressure Sensors ◽  
Weakly Interacting Massive Particles ◽  
Acoustic Sensors ◽  
Good Discrimination ◽  
Bubble Chambers ◽  
Background Events

The PICO experiment uses superheated bubble chambers located at SNOLAB for direct detection of Weakly Interacting Massive Particles (WIMPs), one of the candidate particles for dark matter. Bubbles form in the detector when a particle interacts with a nucleus of the target fluid, and the recoiling deposits enough energy to nucleate a bubble in the superheated fluid. Much of the data analysis for PICO focuses on determining what type of particle caused a bubble to form. The differentiation is made by analysing signals from pressure sensors, piezoelectric acoustic sensors, and stereoscopic cameras. This talk will present an overview of the sensors and analysis which are used to discriminate between WIMP interactions and background events in the PICO 2L detector, with a focus on the role of image analysis and the potential sensitivity of the detector if good discrimination can be realized.

scholarly journals Dark matter candidate with well-defined mass and couplings

2017 ◽  
Vol 32 (25) ◽  
pp. 1730022 ◽  
Author(s):  
Roland E. Allen ◽  
Aritra Saha
Keyword(s):  
Dark Matter ◽  
Z Bosons ◽  
Massive Particle ◽  
Dark Matter Candidate ◽  
Weakly Interacting

We propose a Higgs-related but spin-[Formula: see text] dark matter candidate with a mass that is comparable to that of the Higgs. This particle is a weakly interacting massive particle (WIMP) with an R-parity of [Formula: see text], but it can be distinguished from a neutralino by its unconventional couplings to W and Z bosons. Other neutral and charged spin-[Formula: see text] particles of a new kind are also predicted at higher energy.

scholarly journals DARK MATTER SEARCHES WITH SUB-keV GERMANIUM DETECTOR

2010 ◽  
Vol 25 (11n12) ◽  
pp. 944-950
Author(s):  
HENRY T. WONG
Keyword(s):  
Dark Matter ◽  
Research Program ◽  
Magnetic Moments ◽  
Germanium Detector ◽  
Coherent Scattering ◽  
Low Energy ◽  
Underground Laboratory ◽  
Germanium Detectors ◽  
Low Mass ◽  
Under Construction

The theme of the TEXONO research program is on the studies of low energy neutrino and dark matter physics. The current goals are on the development of germanium detectors with sub-keV sensitivities to realize experiments on neutrino magnetic moments, neutrino-nucleus coherent scattering, as well as WIMP dark matter searches. A threshold of 100–200 eV was achieved with prototype detectors at the Kuo-Sheng Neutrino Laboratory. New limits were placed for low-mass WIMPs. The dark matter program will move to a new underground laboratory currently under construction in Sichuan, China.

scholarly journals Fat brane, dark matter and localized kinetic terms in six dimensions

2020 ◽  
Vol 80 (2) ◽  
Author(s):  
Ricardo G. Landim
Keyword(s):  
Dark Matter ◽  
Particle Physics ◽  
Direct Detection ◽  
Kinetic Term ◽  
Finite Width ◽  
Complex Scalar ◽  
Abelian Gauge ◽  
Complex Scalar Field ◽  
Relic Abundance

Abstract Extra dimensions (ED) have been used as attempts to explain several phenomena in particle physics over the years. In this paper we investigate the role of an abelian gauge field as mediator of the interaction between dark matter (DM) and Standard Model (SM) particles, in a model with two flat and transverse ED compactified on the chiral square. DM is confined in a thin brane, localized at the origin of the chiral square, while the SM is localized in a finite width brane, lying in the opposite corner of the square. A brane-localized kinetic term is present in the DM brane, while in the fat brane it is not allowed. In this model the kinetic mixing is not required because we assume that the SM particles couple to the mediator through their $$B-L$$B-L charges, while DM couples to it via a dark charge. Assuming a complex scalar field as DM candidate it is possible to obtain the observed DM relic abundance and avoid direct detection constraints for some parameter choices.

scholarly journals On the Existence of Low-Mass Dark Matter and its Direct Detection

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
James Bateman ◽  
Ian McHardy ◽  
Alexander Merle ◽  
Tim R. Morris ◽  
Hendrik Ulbricht
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Low Mass

scholarly journals Experimental Progress in the Direct Detection of Dark Matter

2005 ◽  
Vol 13 ◽  
pp. 38-41
Author(s):  
Nigel J.T. Smith
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Massive Particle ◽  
Experimental Techniques ◽  
Current Status ◽  
Weakly Interacting ◽  
The Galaxy ◽  
Experimental Approaches

AbstractSeveral experimental approaches are being utilised for the direct detection of the hypothetical weakly interacting massive particle which may constitute the majority of the non-luminous component of the Galaxy. These experimental techniques exploit the coherent recoil of target nuclei during an interaction and include thermal, ionisation, scintillation and tracking detectors. The challenges associated with this detection, the techniques employed and the current status of these searches are reviewed.

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