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https://hdl.handle.net/20.500.11851/11640| Title: | Search for Nearly Mass-Degenerate Higgsinos Using Low-Momentum Mildly Displaced Tracks in pp Collisions at Formula Presented with the ATLAS Detector | Authors: | Filmer, E.K. Grant, C.M. Jackson, P. Kong, A.X.Y. Pandya, H.D. Potti, H. Ruggeri, T.A. |
Keywords: | Germanium alloys Germanium compounds ATLAS detectors ATLAS experiment Dark matter Electroweak scale Hierarchy problem Impact-parameter Proton proton collisions Splittings Transverse impact Transverse momenta Momentum |
Publisher: | American Physical Society | Abstract: | Higgsinos with masses near the electroweak scale can solve the hierarchy problem and provide a dark matter candidate, while detecting them at the LHC remains challenging if their mass splitting is Formula Presented. This Letter presents a novel search for nearly mass-degenerate Higgsinos in events with an energetic jet, missing transverse momentum, and a low-momentum track with a significant transverse impact parameter using Formula Presented of proton-proton collision data at Formula Presented collected by the ATLAS experiment. For the first time since LEP, a range of mass splittings between the lightest charged and neutral Higgsinos from 0.3 to 0.9 GeV is excluded at 95% confidence level, with a maximum reach of approximately 170 GeV in the Higgsino mass. © 2024 CERN, for the ATLAS Collaboration. | URI: | https://doi.org/10.1103/PhysRevLett.132.221801 https://hdl.handle.net/20.500.11851/11640 |
ISSN: | 0031-9007 |
| Appears in Collections: | Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection |
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