scholarly journals Electroweak corrections in a pseudo Nambu-Goldstone Dark Matter model revisited

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Seraina Glaus ◽  
Margarete Mühlleitner ◽  
Jonas Müller ◽  
Shruti Patel ◽  
Tizian Römer ◽  
...  
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Parameter Space ◽  
Goldstone Boson ◽  
Indirect Evidence ◽  
Tree Level ◽  
Dark Matter Candidate ◽  
Nucleon Scattering ◽  
The Cross ◽  
Electroweak Corrections

Abstract Having so far only indirect evidence for the existence of Dark Matter a plethora of experiments aims at direct detection of Dark Matter through the scattering of Dark Matter particles off atomic nuclei. For the correct interpretation and identification of the underlying nature of the Dark Matter constituents higher-order corrections to the cross section of Dark Matter-nucleon scattering are important, in particular in models where the tree-level cross section is negligibly small. In this work we revisit the electroweak corrections to the dark matter-nucleon scattering cross section in a model with a pseudo Nambu-Goldstone boson as the Dark Matter candidate. Two calculations that already exist in the literature, apply different approaches resulting in different final results for the cross section in some regions of the parameter space leading us to redo the calculation and analyse the two approaches to clarify the situation. We furthermore update the experimental constraints and examine the regions of the parameter space where the cross section is above the neutrino floor but which can only be probed in the far future.

scholarly journals A Sub-GeV Low Mass Hidden Dark Sector of SU(2)H × U(1)X

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Raymundo Ramos ◽  
Van Que Tran ◽  
Tzu-Chiang Yuan
Keyword(s):  
Dark Matter ◽  
Gauge Group ◽  
Parameter Space ◽  
Scalar Potential ◽  
Indirect Detection ◽  
Tree Level ◽  
Dark Matter Candidate ◽  
Dark Photon ◽  
Relic Density ◽  
Low Mass

Abstract We present a detailed study of the non-abelian vector dark matter candidate Wt with a MeV–GeV low mass range, accompanied by a dark photon A′ and a dark Z′ of similar masses, in the context of a gauged two-Higgs-doublet model with the hidden gauge group that has the same structure as the Standard Model electroweak gauge group. The stability of dark matter is protected by an accidental discrete Z2 symmetry (h-parity) which was usually imposed ad hoc by hand. We examine the model by taking into account various experimental constraints including dark photon searches at NA48, NA64, E141, ν-CAL, BaBar and LHCb experiments, electroweak precision data from LEP, relic density from Planck satellite, direct (indirect) detection of dark matter from CRESST-III, DarkSide-50, XENON1T (Fermi-LAT), and collider physics from the LHC. The theoretical requirements of bounded from below of the scalar potential and tree level perturbative unitarity of the scalar sector are also imposed. The viable parameter space of the model consistent with all the constraints is exhibited. While a dark Z′ can be the dominant contribution in the relic density due to resonant annihilation of dark matter, a dark photon is crucial to dark matter direct detection. We also demonstrate that the parameter space can be further probed by various sub-GeV direct dark matter experimental searches at CDEX, NEWS-G and SuperCDMS in the near future.

scholarly journals A connection between flavour anomaly, neutrino mass, and axion

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Seungwon Baek
Keyword(s):  
Dark Matter ◽  
Cold Dark Matter ◽  
Goldstone Boson ◽  
Mass Term ◽  
Higgs Doublet ◽  
New Physics ◽  
Fine Tuning ◽  
Spontaneous Breaking ◽  
Tree Level ◽  
Dark Matter Candidate

Abstract We propose a minimal model in which the flavour anomaly in the b → sμ+μ− transition is connected to the breaking of Peccei-Quinn (PQ) symmetry. The flavour anomaly is explained from new physics contribution by introducing one generation of heavy quark and heavy lepton which are vector-like under the standard model (SM) gauge group but charged under a local U(1)X group. They mix with the SM quarks and leptons, inducing flavour-changing Z′ couplings, which generates the b → sμ+μ− anomaly at tree level. On the other hand the new fermions are chiral under the global Peccei-Quinn(PQ) symmetry. The pseudo-Goldstone boson coming from the spontaneous breaking of the PQ symmetry becomes an axion, solving the strong CP problem and providing a cold dark matter candidate. The same symmetry prevents the right-handed neutrino from having a Majorana mass term. But the introduction of a neutrino-specific Higgs doublet allows neutrino to have Dirac mass term without fine-tuning problem. The model shows an interplay between axion, neutrino, dark matter, and flavour physics.

scholarly journals Constraining the Inert Doublet Model using Vector Boson Fusion

2019 ◽  
Vol 79 (11) ◽  
Author(s):  
Daniel Dercks ◽  
Tania Robens
Keyword(s):  
Dark Matter ◽  
Parameter Space ◽  
Vector Boson ◽  
Higgs Doublet ◽  
Dark Matter Candidate ◽  
Final States ◽  
Vector Boson Fusion ◽  
Doublet Model ◽  
Inert Doublet Model ◽  
Two Higgs Doublet Model

AbstractIn this work, we use a recast of the Run II search for invisible Higgs decays within Vector Boson Fusion to constrain the parameter space of the Inert Doublet model, a two Higgs doublet model with a dark matter candidate. When including all known theoretical as well as collider constraints, we find that the above can rule out a relatively large part in the $$m_H,\,\lambda _{345}$$mH,λ345 parameter space, for dark scalar masses $$m_H\,\le \,100\,{\mathrm{GeV}}$$mH≤100GeV. Including the latest dark matter constraints, a smaller part of parameter space remains which is solely excluded from the above analysis. We also discuss the sensitivity of monojet searches and multilepton final states from Run II.

scholarly journals Quasielastic Lepton Scattering off Two-Component Dark Matter in Hypercolor Model

Symmetry ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 708 ◽  
Author(s):  
Vitaly Beylin ◽  
Maxim Bezuglov ◽  
Vladimir Kuksa ◽  
Egor Tretiakov
Keyword(s):  
Dark Matter ◽  
Total Cross Section ◽  
Cross Section ◽  
Strong Dependence ◽  
Cosmic Ray ◽  
High Energy ◽  
Dominant Contribution ◽  
Quasielastic Scattering ◽  
Two Component ◽  
The Cross

The interaction of high-energy leptons with components of Dark Matter in a hypercolor model is considered. The possibility of detection, using IceCube secondary neutrinos produced by quasielastic scattering of cosmic ray electrons off hidden mass particles, is investigated. The dominant contribution to the cross section results from diagrams with scalar exchanges. A strong dependence of the total cross section on the Dark Matter components mass is also found.

scholarly journals ENHANCEMENT OF CHARGED HIGGS PRODUCTION IN ASSOCIATION WITH W± AT MUON COLLIDERS IN GENERAL TWO HIGGS DOUBLET MODELS

2012 ◽  
Vol 27 (28) ◽  
pp. 1250165 ◽  
Author(s):  
M. HASHEMI
Keyword(s):  
Higgs Boson ◽  
Cross Section ◽  
Parameter Space ◽  
Mass Parameter ◽  
Higgs Doublet ◽  
Higgs Production ◽  
Boson Mass ◽  
Charged Higgs ◽  
The Cross ◽  
Muon Colliders

The charged Higgs production associated with a W± boson has a smooth cross-section as a function of the charged Higgs mass at muon colliders. The cross-section in minimal supersymmetric standard model (MSSM) is about 25 fb in the range 200 GeV < mH± <400 GeV with tan β = 50. This is much larger than the corresponding cross-section at an e+e- collider which reaches a fraction of femtobarn. The observability of this charged Higgs production at a muon collider has been recently studied in an earlier work leading to the result that with 1 ab-1, a 5σ signal can be observed throughout the aforementioned mass range. In this paper, results of a study based on a general two Higgs doublet model (types II and III) are presented and the cross-section of the charged Higgs production in the most sensitive parameter space is evaluated. It is concluded that the cross-section increases with increasing neutral Higgs boson masses involved in the s-channel diagram and can be as large as several picobarn with tan β = 50. The region of "physical Higgs boson mass" parameter space which could lead to a 5σ signal at 50 fb-1 is specified.

scholarly journals Deformed compact extra space as dark matter candidate

2015 ◽  
Vol 24 (13) ◽  
Author(s):  
Vakhid A. Gani ◽  
Alexander E. Dmitriev ◽  
Sergey G. Rubin
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Spatial Domain ◽  
Dark Matter Candidate ◽  
Observational Constraints ◽  
Two Dimensional ◽  
Ordinary Matter ◽  
Multidimensional Gravity ◽  
Extra Space ◽  
Defect Estimation

We elaborate the possibility for a deformed extra space to be considered as the dark matter candidate. To perform calculations, a class of two-dimensional extra metrics was considered in the framework of the multidimensional gravity. It was shown that there exists a family of stationary metrics of the extra space possessing point-like defect. Estimation of cross-section of scattering of a particle of the ordinary matter on a spatial domain with deformed extra space is in agreement with the observational constraints.

scholarly journals Light WIMP Searches Involving Electron Scattering

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
J. D. Vergados ◽  
Ch. C. Moustakidis ◽  
Yeuk-Kwan E. Cheung ◽  
H. Ejiri ◽  
Yeongduk Kim ◽  
...  
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Electron Scattering ◽  
Mass Range ◽  
Bound State ◽  
Particle Model ◽  
Electron Mass ◽  
Bound State Wave Function ◽  
Low Energies ◽  
The Cross

In the present work we examine the possibility of detecting electrons in light dark matter searches. These detectors are considered to be the most appropriate for detecting dark matter particles with a mass in the MeV region. We analyze theoretically some key issues involved in such detection. More specifically we consider a particle model involving WIMPs interacting with fermions via Z-exchange. We find that for WIMPs with mass in the electron mass range the cross section for WIMP-atomic electron scattering is affected by the electron binding. For WIMPs more than 20 times heavier than the electron, the binding affects the kinematics very little. As a result, many electrons can be ejected with energy which increases linearly with the WIMP mass, but the cross section is somewhat reduced depending on the bound state wave function employed. On the other hand for lighter WIMPs, the effect of binding is dramatic. More specifically at most 10 electrons, namely, those with binding energy below 10 eV, become available even in the case of WIMPs with a mass as large as 20 times the electron mass. Even fewer electrons contribute if the WIMPs are lighter. The cross section is, however, substantially enhanced by the Fermi function corrections, which become more important at low energies of the outgoing electrons. Thus events of 0.5–2.5 per kg-y become possible.

scholarly journals PRODUCTION OF LONG-LIVED CHARGED SLEPTONS AT LHC

2005 ◽  
Vol 20 (40) ◽  
pp. 3085-3093 ◽  
Author(s):  
A. V. GLADYSHEV ◽  
D. I. KAZAKOV ◽  
M. G. PAUCAR
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Parameter Space ◽  
Production Cross Section ◽  
Narrow Band ◽  
Production Cross ◽  
Small Mass

We analyze the MSSM parameter space and discuss the narrow band in the so-called co-annihilation region where sleptons may be long-lived particles. This region is consistent with the WMAP restrictions on the Dark matter and depends on the value of tan β. In this region staus are long-lived and may go through the detector. Due to a relatively small mass (150–850 GeV) their production cross-section at LHC may reach a few % pb.

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