Closing in on the chargino contribution to the muon g − 2 in the MSSM: Current LHC constraints

Hagiwara, Kaoru; Ma, Kai; Mukhopadhyay, Satyanarayan

doi:10.1103/PhysRevD.97.055035

Title: Closing in on the chargino contribution to the muon $g - 2$ in the MSSM: Current LHC constraints

Journal Article · Mon Mar 26 00:00:00 EDT 2018 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.97.055035· OSTI ID:1429569

Hagiwara, Kaoru; Ma, Kai; Mukhopadhyay, Satyanarayan

We revisit the current LHC constraints on the electroweak-ino sector parameters in the minimal supersymmetric standard model (MSSM) that are relevant to explaining the (g - 2)_μ anomaly via the dominant chargino and muon sneutrino loop. Since the LHC bounds on electroweak-inos become weaker if they decay via an intermediate stau or a tau sneutrino instead of the first two generation sleptons, we perform a detailed analysis of the scenario with a bino as the lightest supersymmetric particle (LSP) and a light stau as the next-to-lightest one (NLSP). Even in this scenario, the chargino sector parameters in the MSSM that can account for the (g - 2)_μ anomaly within 1σ are already found to be significantly constrained by the 8 TeV LHC and the available subset of the 13 TeV LHC limits. We also estimate the current LHC exclusions in the left-smuon (and/or left-selectron) NLSP scenario from multilepton searches, and further combine the constraints from the multitau and multilepton channels for a mass spectrum in which all three generations of sleptons are lighter than the chargino. In the latter two cases, small corners of the 1σ favored region for (g - 2)_μ are still allowed at present.

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Research Organization:: Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-95ER40896

OSTI ID:: 1429569

Alternate ID(s):: OSTI ID: 1498923

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 97 Journal Issue: 5; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 22 works

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