Vacuum stability in stau-neutralino coannihilation in MSSM

Abstract

The stau-neutralino coannihilation provides a feasible way to accommodate the observed cosmological dark matter (DM) relic density in the minimal supersymmetric standard model (MSSM). In such a coannihilation mechanism the stau mass usually has an upper bound since its annihilation rate becomes small with the increase of DM mass. Inspired by this observation, we examine the upper limit of stau mass in the parameter space with a large mixing of staus. We find that the stau pair may dominantly annihilate into dibosons and hence the upper bound on the stau mass ($\sim 400$ GeV) obtained from the $f\bar{f}$ final states can be relaxed. Imposing the DM relic density constraint and requiring a long lifetime of the present vacuum, we find that the lighter stau mass can be as heavy as about 1.4 TeV for the stau maximum mixing. However, if requiring the present vacuum to survive during the thermal history of the universe, this mass limit will reduce to about 0.9 TeV. We also discuss the complementarity of vacuum stability and direct detections in probing this stau coannihilation scenario.

arXiv comment12 pages, 6 figures

References in corpus (37)

• Supersymmetric Dark Matter
• SPheno, a program for calculating supersymmetric spectra, SUSY particle decays and SUSY particle production at e+ e- colliders
• First Dark Matter Search Results from the XENON1T Experiment
• micrOMEGAs: A program for calculating the relic density in the MSSM
• CosmoTransitions: Computing Cosmological Phase Transition Temperatures and Bubble Profiles with Multiple Fields
• The Well-Tempered Neutralino
• Calculations of Neutralino-Stau Coannihilation Channels and the Cosmologically Relevant Region of MSSM Parameter Space
• Neutralino-Stau Coannihilation and the Cosmological Upper Limit on the Mass of the Lightest Supersymmetric Particle
• Strong Constraints on the Parameter Space of the MSSM from Charge and Color Breaking Minima
• Anomaly-Free Gauged R-Symmetry
• Cosmological Relic Density from Minimal Supergravity with Implications for Collider Physics
• Light Scalar Top Quarks and Supersymmetric Dark Matter
• Two-loop effective potential for a general renormalizable theory and softly broken supersymmetry
• Limits on spin-dependent WIMP-nucleon cross section obtained from the complete LUX exposure
• Phase Transitions and Vacuum Tunneling Into Charge and Color Breaking Minima in the MSSM
• Neutralino relic density in minimal supergravity with co-annihilations
• Decoupling of the $\epsilon$-scalar mass in softly broken supersymmetry
• Vevacious: A Tool For Finding The Global Minima Of One-Loop Effective Potentials With Many Scalars
• Electroweak Vacuum (In)Stability in an Inflationary Universe
• Global fits of GUT-scale SUSY models with GAMBIT
• Constraining the Natural MSSM through tunneling to color-breaking vacua at zero and non-zero temperature
• Charge-breaking constraints on left-right mixing of stau's
• Long life stau in the minimal supersymmetric standard model
• Gluino Annihilations and Neutralino Dark Matter
• Status of CMSSM in light of current LHC Run-2 and LUX data
• Status and prospects of light bino-higgsino dark matter in natural SUSY
• Constraints on the Minimal Supergravity Model from Non-standard Vacua
• A new approach for detecting compressed bino/wino at the LHC
• Measuring Lepton Flavour Violation at LHC with Long-Lived Slepton in the Coannihilation Region
• The Not-So-Well Tempered Neutralino
• Probing bino-wino coannihilation dark matter under the neutrino floor at the LHC
• Stau Coannihilation, Compressed Spectrum and SUSY Discovery at the LHC
• Gluino Coannihilation and Observability of Gluinos at LHC RUN II
• Search for dark matter from the first data of the PandaX-II experiment
• Improved Mass Constraints in the MSSM from Vacuum Stability
• Revealing the jet substructure in a compressed spectrum
• Probing Bino-Gluino Coannihilation at the LHC

Cited by in corpus (7)

• Muon $g-2$ and Co-annihilating Dark Matter in the MSSM
• Search for supersymmetry with a compressed mass spectrum in events with a soft $\tau$ lepton, a highly energetic jet, and large missing transverse momentum in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Leptophilic fermion WIMP ~ Role of future lepton colliders
• Hunting for Scalar Lepton Partners at Future Electron Colliders
• New Physics Search at the CEPC: a General Perspective
• On the coverage of neutralino dark matter in coannihilations at the upgraded LHC
• Sleptonic SUSY: From UV Framework to IR Phenomenology