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

Abstract

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.

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1429569
Alternate Identifier(s):
OSTI ID: 1498923
Grant/Contract Number:  
FG02-95ER40896
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 97 Journal Issue: 5; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Hagiwara, Kaoru, Ma, Kai, and Mukhopadhyay, Satyanarayan. Closing in on the chargino contribution to the muon g − 2 in the MSSM: Current LHC constraints. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.97.055035.
Hagiwara, Kaoru, Ma, Kai, & Mukhopadhyay, Satyanarayan. Closing in on the chargino contribution to the muon g − 2 in the MSSM: Current LHC constraints. United States. doi:10.1103/PhysRevD.97.055035.
Hagiwara, Kaoru, Ma, Kai, and Mukhopadhyay, Satyanarayan. Mon . "Closing in on the chargino contribution to the muon g − 2 in the MSSM: Current LHC constraints". United States. doi:10.1103/PhysRevD.97.055035.
@article{osti_1429569,
title = {Closing in on the chargino contribution to the muon g − 2 in the MSSM: Current LHC constraints},
author = {Hagiwara, Kaoru and Ma, Kai and Mukhopadhyay, Satyanarayan},
abstractNote = {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.},
doi = {10.1103/PhysRevD.97.055035},
journal = {Physical Review D},
number = 5,
volume = 97,
place = {United States},
year = {2018},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
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DOI: 10.1103/PhysRevD.97.055035

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