scholarly journals DARK MATTER IN THE MSSM AND ITS SINGLET EXTENSION

2010 ◽  
Vol 25 (11n12) ◽  
pp. 976-982 ◽  
Author(s):  
JIN MIN YANG
Keyword(s):  
Dark Matter ◽  
Higgs Boson ◽  
Cross Section ◽  
Higgs Bosons ◽  
Annihilation Cross Section ◽  
Supersymmetric Model ◽  
Sommerfeld Effect ◽  
Dark Matter Relic Density ◽  
Relic Density ◽  
Minimal Supersymmetric Model

We briefly review the supersymmetric explanation for the cosmic dark matter. Although the neutralino in the minimal supersymmetric model (MSSM), the next-to-minimal supersymmetric model (NMSSM) and the nearly minimal supersymmetric model (nMSSM) can naturally explain the dark matter relic density, the PAMELA result can hardly be explained in these popular models. In the general singlet extension of the MSSM, both the PAMELA result and the relic density can be explained by the singlino-like neutralino. Such singlino-like neutralinos annihilate into the singlet-like Higgs bosons, which are light enough to decay dominantly to muons or electrons, and the annihilation cross section can be greatly enhanced by the Sommerfeld effect via exchanging a light CP-even singlet-like Higgs boson. In this scenario, in order to meet the stringent LEP constraints, the SM-like Higgs boson tends to decay into the singlet Higgs pairs instead of [Formula: see text] and consequently it will give a multi-muon signal hSM → aa → 4µ or hSM → hh → 4a → 8µ at the LHC.

scholarly journals SUSY DARK MATTER IN LIGHT OF CDMS/XENON LIMITS

2011 ◽  
Vol 20 (08) ◽  
pp. 1383-1388 ◽  
Author(s):  
JIN MIN YANG
Keyword(s):  
Dark Matter ◽  
Higgs Boson ◽  
Parameter Space ◽  
Charged Higgs Boson ◽  
Higgs Bosons ◽  
Dark Matter Relic Density ◽  
Higgs Search ◽  
Relic Density ◽  
Supersymmetric Models ◽  
Charged Higgs

We briefly review the current CDMS/XENON constraints on the neutralino dark matter in three popular supersymmetric models: the minimal (MSSM), the next-to-minimal (NMSSM) and the nearly minimal (nMSSM). The constraints from the dark matter relic density and various collider experiments are also taken into account. The conclusion is that for each model the current CDMS/XENON limits can readily exclude a large part of the parameter space allowed by other constraints and the future SuperCDMS or XENON100 can cover most of the allowed parameter space. The implication for the Higgs search at the LHC is also discussed. It is found that in the currently allowed parameter space the MSSM charged Higgs boson is quite unlikely to be discovered at the LHC while the neutral Higgs bosons H and A may be accessible at the LHC in the parameter space with a large μ parameter.

scholarly journals DETECTION OF INTERMEDIATE MASS HIGGS BOSONS FROM SPONTANEOUSLY BROKEN R-PARITY SUPERSYMMETRY

1994 ◽  
Vol 09 (09) ◽  
pp. 817-827 ◽  
Author(s):  
J. C. ROMÃO ◽  
J. L. DIAZ-CRUZ ◽  
F. DE CAMPOS ◽  
J. W. F. VALLE
Keyword(s):  
Mass Spectrum ◽  
Higgs Boson ◽  
Transverse Momentum ◽  
Higgs Sector ◽  
Higgs Bosons ◽  
Supersymmetric Model ◽  
Intermediate Mass ◽  
Missing Transverse Momentum ◽  
The Standard Model ◽  
Minimal Supersymmetric Model

The Higgs sector in spontaneously broken R-parity supersymmetry (RPSUSY) shows interesting features that require new search techniques. Both the mass spectrum and production rates may differ from the Standard Model and minimal supersymmetric model (MSSM) expectations. For some parameter choices, the dominant Higgs boson decay mode can even be invisible, leading to events with large missing transverse momentum carried by superweakly interacting majorons. We study the reaction pp → Z + H + X, and find that it can lead to detectable events at LHC/SSC for a large region of parameter space.

scholarly journals NEUTRALINO DARK MATTER ELASTIC SCATTERING IN A FLAT AND ACCELERATING UNIVERSE

2001 ◽  
Vol 16 (19) ◽  
pp. 1229-1241 ◽  
Author(s):  
A. B. LAHANAS ◽  
V. C. SPANOS ◽  
D. V. NANOPOULOS
Keyword(s):  
Dark Matter ◽  
Higgs Boson ◽  
Elastic Scattering ◽  
Cross Section ◽  
Lower Bounds ◽  
Parameter Space ◽  
Accelerating Universe ◽  
Relic Density ◽  
Supersymmetric Models ◽  
Cosmological Data

In SUGRA inspired supersymmetric models with universal boundary conditions for the soft masses, the scalar cross-section σ scalar for the elastic neutralino–nucleon scattering is in general several orders of magnitude below the sensitivity of current experiments. For large tan β and low M1/2, m0 values, the theoretically predicted σ scalar can approach the sensitivity of these experiments (≈ 10-6 pb ) being at the same time in agreement with recent cosmological data, which impose severe restrictions on the CDM relic density, and with accelerator experiments which put lower bounds on sparticle and Higgs boson masses. Further improvement of the sensitivity of DAMA and CDMS experiments will probe the large tan β region of the parameter space in the vicinity of the boundaries of the parameter space allowed by chargino and Higgs searches.

scholarly journals Closing the Window on Light Charged Higgs Bosons in the NMSSM

2012 ◽  
Vol 2012 ◽  
pp. 1-22 ◽  
Author(s):  
Johan Rathsman ◽  
Thomas Rössler
Keyword(s):  
Higgs Boson ◽  
Large Hadron Collider ◽  
Branching Fraction ◽  
Hadron Collider ◽  
Higgs Bosons ◽  
Supersymmetric Model ◽  
Charged Higgs ◽  
Charged Higgs Bosons ◽  
Minimal Supersymmetric Model ◽  
Higgs Signal

In the Next-to-Minimal SuperSymmetric Model (NMSSM) the lightest CP-odd Higgs bosons (a1) can be very light. As a consequence, in addition to the standard charged Higgs boson (h±) decays considered in the MSSM for a light charged Higgs (mh±<mt), the branching fraction forh±→a1Wcan be dominant. We investigate how this signal can be searched for intt-production at the Large Hadron Collider (LHC) in the case that (ma1≳2mB) with thea1giving rise to a singlebb--jet and discuss to what extent the LHC experiments are able to discover such a scenario with an integrated luminosity ~20 fb−1. We also discuss the implications of the possible Higgs-signal observed at the LHC.

scholarly journals Dark matter, fine-tuning and (g-2)_{\mu} in the pMSSM

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Melissa van Beekveld ◽  
Wim Beenakker ◽  
Marrit Schutten ◽  
Jeremy De Wit
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Cross Section ◽  
Direct Detection ◽  
Fine Tuning ◽  
Dark Matter Relic Density ◽  
Depth Analysis ◽  
Relic Density ◽  
The Right ◽  
First Time

In this paper we perform for the first time an in-depth analysis of the spectra in the phenomenological supersymmetric Standard Model that simultaneously offer an explanation for the (g-2)_{\mu}(g−2)μ discrepancy \Delta a_{\mu}Δaμ, result in the right dark-matter relic density \Omega_{DM} h^2ΩDMh2 and are minimally fine-tuned. The resulting spectra may be obtained from [1]. To discuss the experimental exclusion potential for our models, we analyse the resulting LHC phenomenology as well as the sensitivity of dark-matter direct detection experiments to these spectra. We find that the latter type of experiments with sensitivity to the spin-dependent dark-matter–nucleon scattering cross section \sigma_{SD,p}σSD,p will probe all of our found solutions.

scholarly journals A Comparative Study of Dark Matter in the MSSM and Its Singlet Extensions: A Mini Review

2012 ◽  
Vol 2012 ◽  
pp. 1-22 ◽  
Author(s):  
Wenyu Wang
Keyword(s):  
Dark Matter ◽  
Higgs Boson ◽  
Comparative Study ◽  
Parameter Space ◽  
Light Neutralino ◽  
Dark Matter Relic Density ◽  
Relic Density ◽  
The Future

In this note we briefly review the recent studies of dark matter in the MSSM and its singlet extensions: the NMSSM, the nMSSM, and the general singlet extension. Under the new detection results of CDMS II, XENON, CoGeNT, and PAMELA, we find that (i) the latest detection results can exclude a large part of the parameter space which is allowed by current collider constraints in these models. The future SuperCDMS and XENON can cover most of the allowed parameter space; (ii) the singlet sector will decouple from the MSSM-like sector in the NMSSM; however, singlet sector makes the nMSSM quite different from the MSSM; (iii) the NMSSM can allow light dark matter at several GeV to exist. Light CP-even or CP-odd Higgs boson must be present so as to satisfy the measured dark matter relic density. In case of the presence of a light CP-even Higgs boson, the light neutralino dark matter can explain the CoGeNT and DAMA/LIBRA results; (iv) the general singlet extension of the MSSM gives a perfect explanation for both the relic density and the PAMELA result through the Sommerfeld-enhanced annihilation. Higgs decays in different scenario are also studied.

scholarly journals Relativistic freeze-in with scalar dark matter in a gauged B − L model and electroweak symmetry breaking

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Priyotosh Bandyopadhyay ◽  
Manimala Mitra ◽  
Abhishek Roy
Keyword(s):  
Dark Matter ◽  
Higgs Boson ◽  
Symmetry Breaking ◽  
Electroweak Symmetry Breaking ◽  
Higgs Bosons ◽  
Thermal Mass ◽  
Electroweak Symmetry ◽  
Mass Correction ◽  
Dark Matter Relic Density ◽  
Bose Einstein

Abstract We explore relativistic freeze-in production of scalar dark matter in gauged B − L model, where we focus on the production of dark matter from the decay and annihilation of Standard Model (SM) and B − L Higgs bosons. We consider the Bose-Einstein (BE) and Fermi-Dirac (FD) statistics, along with the thermal mass correction of the SM Higgs boson in our analysis. We show that in addition to the SM Higgs boson, the annihilation and decay of the B − L scalar can also contribute substantially to the dark matter relic density. Potential effects of electroweak symmetry breaking (EWSB) and thermal mass correction in BE framework enhance the dark matter relic substantially as it freezes-in near EWSB temperature via scalar annihilation. However, such effects are not so prominent when the dark matter freezes-in at a later epoch than EWSB, dominantly by decay of scalars. The results of this analysis are rather generic, and applicable to other similar scenarios.

scholarly journals Hybrid anomaly and gravity mediation for electroweak supersymmetry

2018 ◽  
Vol 33 (07) ◽  
pp. 1850035
Author(s):  
Bin Zhu ◽  
Ran Ding ◽  
Tianjun Li
Keyword(s):  
Dark Matter ◽  
Supersymmetry Breaking ◽  
Cross Section ◽  
Direct Detection ◽  
Dark Matter Candidate ◽  
Gauge Mediation ◽  
Anomaly Mediation ◽  
Dark Matter Relic Density ◽  
Relic Density ◽  
Hybrid Anomaly

In this paper, we propose a hybrid mediation and hybrid supersymmetry breaking. In particular, the RG-invariant anomaly mediation is considered. Together with additional gravity mediation, the slepton tachyon problem of anomaly mediation is solved automatically. The special properties are that all color sparticles masses fall into several TeV regions due to the large [Formula: see text] and [Formula: see text] which are well beyond the scope of current LHC Run II limits. Unlike the gauge mediation, the dark matter candidate is still the lightest neutralino and the correct dark matter relic density can be realized within the framework of mixed axion-Wino dark matter. Due to the existence of multi-component axion-Wino dark matter, the direct detection cross-section is suppressed to evade the tightest LUX, PandaX bound.

scholarly journals The Bactrian effect: multiple resonances and light Dirac dark matter

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Thomas G. Rizzo
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Mass Range ◽  
Annihilation Cross Section ◽  
Dirac Fermion ◽  
Destructive Interference ◽  
Annihilation Rate ◽  
Annihilation Process ◽  
Gauge Bosons ◽  
Relic Density

Abstract The possibility of light dark matter (DM) annihilating through a dark photon (DP) which kinetically mixes (KM) with the Standard Model (SM) hypercharge field is a very attractive scenario. For DM in the interesting mass range below ∼ 1 GeV, it is well known that bounds from the CMB provide a very strong model building constraint forcing the DM annihilation cross section to be roughly 3 orders of magnitude below that needed to reproduce the observed relic density. Under most circumstances this removes the possibility of an s-wave annihilation process for DM in this mass range as would be the case, e.g., if the DM were a Dirac fermion. In an extra-dimensional setup explored previously, it was found that the s-channel exchange of multiple gauge bosons could simultaneously encompass a suppressed annihilation cross section during the CMB era while also producing a sufficiently large annihilation rate during freeze-out to recover the DM relic density. In this paper, we analyze more globally the necessary requirements for this mechanism to work successfully and then realize them within the context of a simple model with two ‘dark’ gauge bosons having masses of a similar magnitude and whose contributions to the annihilation amplitude destructively interfere. We show that if the DM mass threshold lies appropriately in the saddle region of this destructive interference between the two resonance humps it then becomes possible to satisfy these requirements simultaneously provided several ancillary conditions are met. The multiple constraints on the parameter space of this setup are then explored in detail to identify the phenomenologically successful regions.

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