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Title: Cornering Higgsinos Using Soft Displaced Tracks

Journal Article · · Physical Review Letters

Higgsino has been intensively searched for in the LHC experiments in recent years. Currently, there is an uncharted region beyond the LEP Higgsino mass limit where the mass splitting between the neutral and charged Higgsinos is around 0.3–1 GeV, which is unexplored by either the soft di-lepton or disappearing track searches. This region is, however, of great importance from a phenomenological point of view, as many supersymmetric models predict such a mass spectrum. In this Letter, we propose a possibility of filling this gap by using a soft microdisplaced track in addition to the monojet event selection, which allows us to discriminate a signature of the charged Higgsino decay from the standard model background. It is found that this new strategy is potentially sensitive to a Higgsino mass of ≲ 180(250) GeV at the LHC Run2 (HL-LHC) for a charged-neutral mass splitting of ≃ 0.5 GeV.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); Japan Society for the Promotion of Science (JSPS)
Grant/Contract Number:
AC02-05CH11231; 17H02878; 17K14270; 18H05542; 18K13535; 19H04609; 19K23439
OSTI ID:
1604225
Alternate ID(s):
OSTI ID: 1737602
Journal Information:
Physical Review Letters, Vol. 124, Issue 10; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

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