End of the CMSSM coannihilation strip is nigh

2012/12/12 by Matthew Citron, M. Citron, J. Ellis +7 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Dark Matter and Cosmic Phenomena #Energy (signal processing) #Minimal Supersymmetric Standard Model #Neutralino #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Supersymmetry #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevd.87.036012

33 pages, 19 pdf figures

arxiv created 2012/12/12 · openalex publication_date 2013/02/22 · arxiv updated 2013/03/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

A recent global fit to the constrained minimal supersymmetric extension of the Standard Model incorporating current constraints on supersymmetry, including missing transverse energy searches at the LHC, BR(B_s\ensuremath→\ensuremathμ⁺\ensuremathμ^\ensuremath-) and the direct XENON100 search for dark matter, favors points towards the end of the stau-neutralino (\stackrel\texttildelow\ensuremathτ₁\mathrm\text\ensuremath-\ensuremathχ) coannihilation strip with relatively large m_1/2 and 10\ensuremath\lesssimtan\ensuremathβ\ensuremath\lesssim40 and points in the H/A rapid-annihilation funnel with tan\ensuremathβ\ensuremath∼50. The coannihilation points typically have m_\stackrel\texttildelow\ensuremathτ₁\ensuremath-m_\ensuremathχ\ensuremath\lesssim5 GeV, and a significant fraction, including the most-favored point, has m_\stackrel\texttildelow\ensuremathτ₁\ensuremath-m_\ensuremathχ<m_\ensuremathτ. In such a case, the \stackrel\texttildelow\ensuremathτ₁ lifetime would be so long that the \stackrel\texttildelow\ensuremathτ₁ would be detectable as a long-lived massive charged particle that may decay inside or outside the apparatus. We show that CMSSM scenarios close to the tip of the coannihilation strip for tan\ensuremathβ\ensuremath\lesssim40 are already excluded by LHC searches for massive charged particles and discuss the prospects for their detection in the CMS and ATLAS detectors via time-of-flight measurements, anomalous heavy ionization or decays into one or more soft charged particles.

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Cited by

• Global fits of GUT-scale SUSY models with GAMBIT