scholarly journals t − b − τ Yukawa unification in non-holomorphic MSSM

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Yaşar Hiçyılmaz
Keyword(s):  
Dark Matter ◽  
Yukawa Coupling ◽  
Direct Detection ◽  
Detection Limits ◽  
Susy Breaking ◽  
The Third ◽  
Gut Scale ◽  
Yukawa Unification ◽  
Relic Abundance

Abstract We show that in the CMSSM with the non-holomorphic soft SUSY breaking terms, the Yukawa coupling unification of the third family fermions at the GUT scale, called t − b − τ Yukawa unification (YU), is possible under the recent collider and Dark Matter results. The YU parameter can also be found Rtbτ≈ 1, called perfect unification. We find that the squark masses exceed 3 TeV while the stau can be considerably lighter. In the case of YU, the tan β is in the interval [46,55]. We obtain bino-like dark matter (DM) of mass in the range of 0.6 TeV ≲ $$ {m}_{\upchi_1^0} $$ m χ 1 0 ≲ 1.3 TeV where the recent Dark Matter direct detection limits are also satisfied. We also identify A-resonance solutions which reduce the relic abundance of LSP neutralino down to the ranges compatible with the current Planck measurements.

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 SU(5) with nonuniversal gaugino masses

2018 ◽  
Vol 33 (04) ◽  
pp. 1850032 ◽  
Author(s):  
M. Adeel Ajaib
Keyword(s):  
Dark Matter ◽  
Parameter Space ◽  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Direct Detection ◽  
Muon Anomalous Magnetic Moment ◽  
Gaugino Mass ◽  
Gut Scale ◽  
Relic Abundance ◽  
Gaugino Masses

We explore the sparticle spectroscopy of the supersymmetric SU(5) model with nonuniversal gaugino masses in light of latest experimental searches. We assume that the gaugino mass parameters are independent at the GUT scale. We find that the observed deviation in the anomalous magnetic moment of the muon can be explained in this model. The parameter space that explains this deviation predicts a heavy colored sparticle spectrum whereas the sleptons can be light. We also find a notable region of the parameter space that yields the desired relic abundance for dark matter. In addition, we analyze the model in light of latest limits from direct detection experiments and find that the parameter space corresponding to the observed deviation in the muon anomalous magnetic moment can be probed at some of the future direct detection experiments.

scholarly journals Direct detection limits on heavy dark matter

2020 ◽  
Vol 102 (12) ◽  
Author(s):  
Michael Clark ◽  
Amanda Depoian ◽  
Bahaa Elshimy ◽  
Abigail Kopec ◽  
Rafael F. Lang ◽  
...  
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Detection Limits

scholarly journals Informing dark matter direct detection limits with the ARTEMIS simulations

2020 ◽  
Vol 2020 (11) ◽  
pp. 016-016
Author(s):  
Robert Poole-McKenzie ◽  
Andreea S. Font ◽  
Billy Boxer ◽  
Ian G. McCarthy ◽  
Sergey Burdin ◽  
...  
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Detection Limits

scholarly journals Erratum: Direct detection limits on heavy dark matter [Phys. Rev. D 102 , 123026 (2020)]

2021 ◽  
Vol 104 (12) ◽  
Author(s):  
Michael Clark ◽  
Amanda Depoian ◽  
Bahaa Elshimy ◽  
Abigail Kopec ◽  
Rafael F. Lang ◽  
...  
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Detection Limits

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 Supergravity Model of Inflation and Explaining IceCube HESE Data via PeV Dark Matter Decay

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Girish Kumar Chakravarty ◽  
Najimuddin Khan ◽  
Subhendra Mohanty
Keyword(s):  
Dark Matter ◽  
Scalar Field ◽  
Neutrino Flux ◽  
Gauge Coupling ◽  
Susy Breaking ◽  
Particle Spectrum ◽  
Energy Particle ◽  
Hidden Sector ◽  
Kähler Potential ◽  
Gut Scale

We construct a unified model of inflation and PeV dark matter with an appropriate choice of no-scale Kähler potential, superpotential, and gauge kinetic function in terms of MSSM fields and hidden sector Polonyi field. The model is consistent with the CMB observations and can explain the PeV neutrino flux observed at IceCube HESE. A Starobinsky-like Higgs-sneutrino plateau inflation is obtained from the D-term SUGRA potential while F-term being subdominant during inflation. To get PeV dark matter, SUSY breaking at PeV scale is achieved through Polonyi field. This sets the scale for soft SUSY breaking parameters m0,m1/2,A0 at the GUT scale in terms of the parameters of the model. The low-energy particle spectrum is obtained by running the RGEs. We show that the ~125 GeV Higgs and the gauge coupling unification can be obtained in this model. The 6 PeV bino-type dark matter is a subdominant fraction (~11%) of the relic density, and its decay gives the PeV scale neutrino flux observed at IceCube by appropriately choosing the couplings of the R-parity violating operators. Also, we find that there is degeneracy in scalar field parameters γ,β and coupling ζ value in producing the correct amplitude of CMB power spectrum. However, the value of parameter tanβ=1.8, which is tightly fixed from the requirement of PeV scale SUSY breaking, removes the degeneracy in the values of the scalar field parameters to provide a unique solution for inflation. In this way, it brings the explanation for dark matter, PeV neutrinos, and inflation within the same framework.

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 Type-II neutrino seesaw mechanism extension of NMSSM from SUSY breaking mechanisms

2020 ◽  
Vol 80 (8) ◽  
Author(s):  
Zhuang Li ◽  
Fei Wang
Keyword(s):  
Dark Matter ◽  
Direct Detection ◽  
Susy Breaking ◽  
Low Energy ◽  
Precision Measurements ◽  
Type Ii ◽  
Mass Generation ◽  
Seesaw Mechanism ◽  
Neutrino Mass Generation ◽  
Messenger Scale

Abstract We propose to accommodate economically the type-II neutrino seesaw mechanism in (G)NMSSM from GMSB and AMSB, respectively. The heavy triplets within neutrino seesaw mechanism are identified to be the messengers. Therefore, the $$\mu $$μ-problem, the neutrino mass generation, LFV as well the soft SUSY breaking parameters can be economically combined in a non-trivial way. General features of such extensions are discussed. The type-II neutrino seesaw-specific interactions can give additional Yukawa deflection contributions to the soft SUSY breaking parameters of NMSSM, which are indispensable to realize successful EWSB and accommodate the 125 GeV Higgs. Relevant numerical results, including the constraints of dark matter and possible LFV processes $$l_i\rightarrow l_j \gamma $$li→ljγ etc, are also given. We find that our economical type-II neutrino seesaw mechanism extension of NMSSM from AMSB or GMSB can lead to realistic low energy NMSSM spectrum, both admitting the 125 GeV Higgs as the lightest CP-even scalar. The possibility of the 125 GeV Higgs being the next-to-lightest CP-even scalar in GMSB-type scenario is ruled out by the constraints from EWSB, collider and precision measurements. The possibility of the 125 GeV Higgs being the next-to-lightest CP-even scalar in AMSB-type scenario is ruled out by dark matter direct detection experiments. Possible constraints from LFV processes $$l_i\rightarrow l_j \gamma $$li→ljγ can give an upper bound for the messenger scale.

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