scholarly journals On Direct Search for Dark Matter in Scattering Processes within Yukawa Model

2021 ◽  
Vol 66 (11) ◽  
pp. 936
Author(s):  
V.V. Skalozub ◽  
M.S. Dmytriiev
Keyword(s):  
Dark Matter ◽  
Mass Spectrum ◽  
Invariant Mass Spectrum ◽  
Resonant Peak ◽  
Yukawa Model ◽  
Narrow Width Approximation ◽  
The Standard Model ◽  
Dark Matters ◽  
Narrow Width

Nowadays, no dark matter candidates have been discovered. We consider two possible reasons for that, both related to the approach of on-peak resonance searching for. As is believed usually, a new particle suits the conditions that the ratio of the width to the mass is less than 1–3% and a narrow-width approximation (NWA) is applicable to identify such type resonant peak in the invariant mass spectrum of the collision products. In the present paper, in the framework of a generalized Yukawa model, we find out the properties of the searched particle, when its width is larger than a maximal one expected during experiments, and, so, this state could be confused with a noise. We also ascertain the values of particle’s parameters, when the NWA is not applicable and estimate the width value, when it happens. These estimations are relevant to interactions between the Standard model and dark matter particles. Such approach is focused on the role of couplings and mass values introduced in the model describing the interaction of visible and dark matters.

scholarly journals Dark matter polarization operator in the generalized Yukawa model

2020 ◽  
Vol 28 (1) ◽  
pp. 3-8
Author(s):  
M. S. Dmytriiev ◽  
V. V. Skalozub
Keyword(s):  
Dark Matter ◽  
Dark Matter Particle ◽  
Polarization Operator ◽  
Invariant Mass Spectrum ◽  
Resonant Peak ◽  
Arbitrary Parameter ◽  
Model Parameters ◽  
Yukawa Model ◽  
Small Width ◽  
Narrow Width Approximation

Nowadays, no dark matter candidates have been discovered. We consider the possible reason for that which is related to the approach of on-peak resonance searching for. As is believed usually, a new particle has small width and a narrow width approximation is applicable to identify such type resonant peak in the invariant mass spectrum of collision products. In the present paper, in the framework of the generalized Yukawa model, we find out the propertiesof the searched particle when its width is larger than a maximal one expected during experiments and so this state could be missed as a noise. Usually, the new particle width is considered as an arbitrary parameter. Here, we obtain the width of the dark matter particle from an imaginary part of polarization operators. Then the width is analyzed as explicit function of the couplings and masses in the underlying model of the dark matter. The corresponding constraints on the model parameters are obtained. Role of the one-loop mixing of visible and dark matter fields is investigated and constraint on the mixing angle value is derived. These estimations are quite general and, in particular, relevant to interactions between the particles of the Standard model and dark matter.

scholarly journals Higgs Portal Inflation with Fermionic Dark Matter

2018 ◽  
Vol 168 ◽  
pp. 06002
Author(s):  
Aditya Aravind ◽  
Minglei Xiao ◽  
Jiang-Hao Yu
Keyword(s):  
Dark Matter ◽  
Scalar Potential ◽  
Scalar Fields ◽  
Fermionic Field ◽  
Planck Data ◽  
Slow Roll ◽  
The Standard Model ◽  
The Masses ◽  
Higgs Portal

We discuss the inflationary model presented in [1], involving a gauge singlet scalar field and fermionic dark matter added to the standard model. Either the Higgs or the singlet scalar could play the role of the inflaton, and slow roll is realized through its non-minimal coupling to gravity. The effective scalar potential is stabilized by the mixing between the scalars as well as the coupling with the fermionic field. Mixing of the two scalars also provides a portal to dark matter. Constraints on the model come from perturbativity and stability, collider searches and dark matter constraints and impose a constraining relationship on the masses of dark matter and scalar fields. Inflationary predictions are generically consistent with current Planck data.

scholarly journals Production of extra quarks decaying to dark matter beyond the narrow width approximation at the LHC

2017 ◽  
Vol 96 (3) ◽  
Author(s):  
Stefano Moretti ◽  
Dermot O’Brien ◽  
Luca Panizzi ◽  
Hugo Prager
Keyword(s):  
Dark Matter ◽  
Narrow Width Approximation ◽  
Narrow Width

scholarly journals GAUGING THE SHADOW SECTOR WITH SO(3)

2000 ◽  
Vol 15 (19) ◽  
pp. 1221-1225 ◽  
Author(s):  
G. B. TUPPER ◽  
R. J. LINDEBAUM ◽  
R. D. VIOLLIER
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Gauge Group ◽  
Cold Dark Matter ◽  
Atmospheric Neutrino ◽  
Dark Matter Particle ◽  
Low Energy ◽  
Model Based ◽  
The Standard Model

We examine the phenomenology of a low-energy extension of the Standard Model, based on the gauge group SU (3) ⊗ SU (2) ⊗ U (1)⊗ SO (3), with SO(3) operating in the shadow sector. This model offers vacuum νe → νs and νμ → ντ oscillations as the solution of the solar and atmospheric neutrino problems, and it provides a neutral heavy shadow lepton X that takes the role of a cold dark matter particle.

scholarly journals Heavy right-handed neutrino dark matter in left–right models

2017 ◽  
Vol 32 (15) ◽  
pp. 1740007 ◽  
Author(s):  
P. S. Bhupal Dev ◽  
Rabindra N. Mohapatra ◽  
Yongchao Zhang
Keyword(s):  
Dark Matter ◽  
Mass Range ◽  
Neutrino Masses ◽  
Seesaw Mechanism ◽  
Leptonic Sector ◽  
Active Neutrino ◽  
The Standard Model ◽  
The Stability ◽  
The Universe

We show that in a class of non-supersymmetric left–right extensions of the Standard Model (SM), the lightest right-handed neutrino (RHN) can play the role of thermal Dark Matter (DM) in the Universe for a wide mass range from TeV to PeV. Our model is based on the gauge group [Formula: see text] in which a heavy copy of the SM fermions is introduced and the stability of the RHN DM is guaranteed by an automatic [Formula: see text] symmetry present in the leptonic sector. In such models, the active neutrino masses are obtained via the type-II seesaw mechanism. We find a lower bound on the RHN DM mass of order TeV from relic density constraints, as well as a unitarity upper bound in the multi-TeV to PeV scale, depending on the entropy dilution factor. The RHN DM could be made long-lived by soft-breaking of the [Formula: see text] symmetry and provides a concrete example of decaying DM interpretation of the PeV neutrinos observed at IceCube.

scholarly journals Cosmoparticle Physics of Dark Universe

Symmetry ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 112
Author(s):  
Maxim Khlopov
Keyword(s):  
Dark Matter ◽  
Particle Physics ◽  
Beyond The Standard Model ◽  
Fundamental Relationship ◽  
The Standard Model ◽  
Bsm Physics ◽  
Interacting Atoms ◽  
Relationship Of ◽  
Matter Energy

The physics of the dark Universe goes beyond the standard model (BSM) of fundamental interactions. The now-standard cosmology involves inflation, baryosynthesis and dark matter/energy corresponding to BSM physics. Cosmoparticle physics offers cross disciplinary study of the fundamental relationship of cosmology and particle physics in the combination of its physical, astrophysical and cosmological signatures. Methods of cosmoparticle physics in studies of BSM physics in its relationship with inevitably nonstandard features of dark universe cosmology are discussed. In the context of these methods, such exotic phenomena as primordial black holes, antimatter stars in baryon asymmetrical Universe or multi-charged constituents of nuclear interacting atoms of composite dark matter play the role of sensitive probes for BSM models and their parameters.

scholarly journals Doublet–singlet model and unitarity

2016 ◽  
Vol 31 (01) ◽  
pp. 1650013 ◽  
Author(s):  
G. Cynolter ◽  
J. Kovács ◽  
E. Lendvai
Keyword(s):  
Dark Matter ◽  
Mass Spectrum ◽  
Scattering Amplitudes ◽  
Standard Model ◽  
Dark Matter Candidate ◽  
Particle Scattering ◽  
Gauge Bosons ◽  
Yukawa Couplings ◽  
The Standard Model ◽  
Blind Spots

We study the renormalizable singlet–doublet fermionic extension of the Standard Model (SM). In this model, the new vector-like fermions couple to the gauge bosons and to the Higgs via new Yukawa couplings that allow for nontrivial mixing in the new sector, providing a stable, neutral dark matter candidate. Approximate analytic formulae are given for the mass spectrum around the blind spots, where the dark matter candidate coupling to h or Z vanishes. We calculate the two particle scattering amplitudes in the model, impose the perturbative unitarity constraints and establish bounds on the Yukawa couplings.

scholarly journals How and Where the Standard Model of Particle Physics Hides Dark Matter

2020 ◽  
pp. 1-3
Author(s):  
Housam H Safadi ◽  
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Particle Physics ◽  
Higgs Particle ◽  
New Approach ◽  
Visible Matter ◽  
The Standard Model

The Standard Model of particle physics is thought to be the best map that describes our life. For this reason, it could embed dark matter and reason gravity. In this exploration, I am looking at Standard Model through a new approach different from merely classifying particles as fermions and bosons. I will search in them for the concept and role of massiveness. Specifying photons and gluons as the unique bosons declared in Standard Model, I go looking for revealing the secrets of Higgs particle, Z and W-, which should not be visible matter bosons

scholarly journals The LFU ratio $$R_\pi $$ in the Standard Model and beyond

2021 ◽  
Vol 81 (9) ◽  
Author(s):  
Marzia Bordone ◽  
Claudia Cornella ◽  
Gino Isidori ◽  
Matthias König
Keyword(s):  
Mass Spectrum ◽  
Standard Model ◽  
Short Distance ◽  
Invariant Mass Spectrum ◽  
High Accuracy ◽  
Beyond The Standard Model ◽  
Dilepton Invariant Mass ◽  
Precise Information ◽  
The Standard Model ◽  
Decay Widths

AbstractWe discuss the possibility of performing precise tests of $$\mu /e$$ μ / e universality in $$B \rightarrow \pi \ell ^+\ell ^-$$ B → π ℓ + ℓ - decays. We show that in wide regions of the dilepton invariant mass spectrum the ratio between muonic and electronic decay widths can be predicted with high accuracy, both within and beyond the Standard Model. We present numerical expressions which can be used to extract precise information on short-distance dynamics if a deviation from universality is observed in the data.

scholarly journals Majorana fermion dark matter in minimally extended left-right symmetric model

2021 ◽  
Vol 2021 (9) ◽  
Author(s):  
M. J. Neves ◽  
Nobuchika Okada ◽  
Satomi Okada
Keyword(s):  
Dark Matter ◽  
Gauge Group ◽  
Planck Scale ◽  
Majorana Fermion ◽  
Symmetric Model ◽  
Minimal Extension ◽  
Narrow Resonance ◽  
Parameter Region ◽  
The Standard Model

Abstract We present a minimal extension of the left-right symmetric model based on the gauge group SU(3)c× SU(2)L× SU(2)R× U(1)B−L× U(1)X, in which a vector-like fermion pair (ζL and ζR) charged under the U(1)B−L× U(1)X symmetry is introduced. Associated with the symmetry breaking of the gauge group SU(2)R× U(1)B−L× U(1)X down to the Standard Model (SM) hypercharge U(1)Y, Majorana masses for ζL,R are generated and the lightest mass eigenstate plays a role of the dark matter (DM) in our universe by its communication with the SM particles through a new neutral gauge boson “X”. We consider various phenomenological constraints of this DM scenario, such as the observed DM relic density, the LHC Run-2 constraints from the search for a narrow resonance, and the perturbativity of the gauge couplings below the Planck scale. Combining all constraints, we identify the allowed parameter region which turns out to be very narrow. A significant portion of the currently allowed parameter region will be tested by the High-Luminosity LHC experiments.

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