A survey for low stau yields in the MSSM

Abstract

We study the implications of LHC results for the abundance of long-lived staus after freeze-out from thermal equilibrium in a super-WIMP dark matter scenario. We classify regions in the MSSM parameter space according to the stau yield, considering all possible co-annihilation effects as well as the effects of resonances and large Higgs-sfermion couplings. Afterwards, we examine the viability of these regions after imposing experimental and theoretical constraints, in particular a Higgs mass around 125 GeV and null-searches for heavy stable charged particles (HSCP) at the LHC. We work in a pMSSM framework and perform a Monte Carlo scan over the parameter space. To interpret the HSCP searches in our scenario, we consider all potentially important superparticle production processes, developing a fast estimator for NLO cross sections for electroweak and strong production at the LHC. After applying all constraints, we find that stau yields below 10^-14 occur only for resonant annihilation via a heavy Higgs in combination with either co-annihilation or large left-right stau mixing. We encounter allowed points with yields as low as 2x10^-16, thus satisfying limits from big bang nucleosynthesis even for large stau lifetimes.

60 pages + refereces, 60 eps figures, v2: references added, presentation improved, figure 9 changed, results and conclusions unchanged, matches journal version

References in corpus (10)

• Search for Neutral MSSM Higgs Bosons at LEP
• Threshold resummation for squark-antisquark and gluino-pair production at the LHC
• Measurement of the B(s) to mu+ mu- branching fraction and search for B0 to mu+ mu- with the CMS Experiment
• Particle physics catalysis of thermal Big Bang Nucleosynthesis
• Vevacious: A Tool For Finding The Global Minima Of One-Loop Effective Potentials With Many Scalars
• Stability of the CMSSM against sfermion VEVs
• Bounds on long-lived charged massive particles from Big Bang nucleosynthesis
• The number density of a charged relic
• Eluding the BBN constraints on the stable gravitino
• Probing High Reheating Temperature Scenarios at the LHC with Long-Lived Staus

Cited by in corpus (14)

• Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
• Inert Doublet Model in light of LHC Run I and astrophysical data
• Inert Doublet Model in the light of LHC and astrophysical data
• Simplified Models for Exotic BSM Searches
• Gravitino LSP and leptogenesis after the first LHC results
• Signatures of sneutrino dark matter in an extension of the CMSSM
• Heavy stable charged tracks as signatures of non-thermal dark matter at the LHC : a study in some non-supersymmetric scenarios
• Higgs Mediation with Strong Hidden Sector Dynamics
• Determining the lifetime of long-lived particles at the HL-LHC
• Long-Lived stop at the LHC with or without R-parity
• LHC constraints on Gravitino Dark Matter
• LHC prospects for minimal decaying Dark Matter
• Gravitino Dark Matter in Split Supersymmetry with Bilinear R-Parity Violation
• Parametric Coincidence in the Baryon to Dark Matter Ratio from Affleck-Dine Baryogenesis and UV Freeze-in Dark Matter