TY - JOUR
T1 - End of the CMSSM coannihilation strip is nigh
AU - Citron, Matthew
AU - Ellis, John
AU - Luo, Feng
AU - Marrouche, Jad
AU - Olive, Keith A.
AU - De Vries, Kees J.
PY - 2013/2/22
Y1 - 2013/2/22
N2 - 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(Bs→μ +μ-) and the direct XENON100 search for dark matter, favors points towards the end of the stau-neutralino (τ Ëœ1-χ) coannihilation strip with relatively large m1/2 and 10â‰tanâ¡βâ‰40 and points in the H/A rapid-annihilation funnel with tanâ¡β ∼50. The coannihilation points typically have mτËœ 1-mχâ‰5 GeV, and a significant fraction, including the most-favored point, has mτËœ1-m χτ. In such a case, the τ Ëœ1 lifetime would be so long that the τËœ1 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 tanâ ¡βâ‰40 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.
AB - 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(Bs→μ +μ-) and the direct XENON100 search for dark matter, favors points towards the end of the stau-neutralino (τ Ëœ1-χ) coannihilation strip with relatively large m1/2 and 10â‰tanâ¡βâ‰40 and points in the H/A rapid-annihilation funnel with tanâ¡β ∼50. The coannihilation points typically have mτËœ 1-mχâ‰5 GeV, and a significant fraction, including the most-favored point, has mτËœ1-m χτ. In such a case, the τ Ëœ1 lifetime would be so long that the τËœ1 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 tanâ ¡βâ‰40 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.
UR - http://www.scopus.com/inward/record.url?scp=84874550375&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84874550375&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.87.036012
DO - 10.1103/PhysRevD.87.036012
M3 - Article
AN - SCOPUS:84874550375
SN - 1550-7998
VL - 87
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 3
M1 - 036012
ER -