Accessing the core of naturalness, nearly degenerate higgsinos, at the LHC

Accessing the core of naturalness, nearly degenerate higgsinos, at the LHC

A bstract The presence of two light higgsinos nearly degenerate in mass is one of the important characteristics of supersymmetric models meeting the naturalness criteria. Probing such higgsinos at the LHC is very challenging, in particular when the mass-splitting between them is less than 5 GeV. In...

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Veröffentlicht in:The journal of high energy physics 2015-04, Vol.2015 (4), p.1, Article 132
Hauptverfasser: Han, Chengcheng, Kim, Doyoun, Munir, Shoaib, Park, Myeonghun
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Sprache:eng
Schlagworte:
Classical and Quantum Gravitation
Elementary Particles
High energy physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
String Theory
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container_title The journal of high energy physics
container_volume 2015
creator Han, Chengcheng
Kim, Doyoun
Munir, Shoaib
Park, Myeonghun
description A bstract The presence of two light higgsinos nearly degenerate in mass is one of the important characteristics of supersymmetric models meeting the naturalness criteria. Probing such higgsinos at the LHC is very challenging, in particular when the mass-splitting between them is less than 5 GeV. In this study, we analyze such a degenerate higgsino scenario by exploiting the high collinearity between the two muons which originate from the decay of the heavier higgsino into the lighter one and which are accompanied by a high- p T QCD jet. Using our method, we can achieve a statistical significance ∼ 2 . 9 σ as well as S/B ∼ 17% with an integrated luminosity of 3000 fb −1 at the 14 TeV LHC, for the pair production of higgsinos with masses 124 GeV and 120 GeV. A good sensitivity can be achieved even for a smaller mass-splitting when the higgsinos are lighter.
doi_str_mv 10.1007/JHEP04(2015)132
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subjects Classical and Quantum Gravitation
Elementary Particles
High energy physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
String Theory
title Accessing the core of naturalness, nearly degenerate higgsinos, at the LHC
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