期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 4, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP04(2015)132
关键词
Supersymmetry Phenomenology; Jets
资金
- Korea Ministry of Science, ICT and Future Planning, Gyeongsangbuk-Do and Pohang City for Independent Junior Research Groups at the Asia Pacific Center for Theoretical Physics
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
- National Research Foundation of Korea [APCTP] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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 similar to 2.9 sigma as well as S/B similar to 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.
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