Search for Nearly Mass-Degenerate Higgsinos Using Low-Momentum Mildly Displaced Tracks in pp Collisions at Formula Presented with the ATLAS Detector

The ATLAS collaboration; P. Czodrowski; S. Morgenstern; A. Berthold; N. Fritzsche; M. Gutsche; A. Hadef; T. Herrmann; O. Kolay; T. Kresse; J. E. Nitschke; F. Siegert; M. V. Stange; A. Straessner; S. Todt; J. C. Voigt; J. Manjarres Ramos; H. Torres

doi:10.1103/PhysRevLett.132.221801

Search for Nearly Mass-Degenerate Higgsinos Using Low-Momentum Mildly Displaced Tracks in pp Collisions at Formula Presented with the ATLAS Detector

Research output: Contribution to journal › Research article › Contributed › peer-review

Contributors

The ATLAS collaboration - , University of Bucharest, iThemba Laboratory for Accelerator Based Sciences, University of Pretoria, University of South Africa, University of Zululand, Cadi Ayyad University, New York University Abu Dhabi, University of Granada, CERN, University of California at Berkeley, University of Georgia (Tbilisi), Yeditepe University, Mohammed VI Polytechnic University (Author)
P. Czodrowski - , CERN (Author)
S. Morgenstern - , CERN (Author)
A. Berthold - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
N. Fritzsche - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
M. Gutsche - , Chair of Experimental Particle Physics, Institute of Nuclear and Particle Physics, Chair of Particle Physics, TUD Dresden University of Technology (Author)
A. Hadef - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
T. Herrmann - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
O. Kolay - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
T. Kresse - , Chair of Experimental Particle Physics, Institute of Nuclear and Particle Physics, Chair of Particle Physics, TUD Dresden University of Technology (Author)
J. E. Nitschke - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
F. Siegert - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
M. V. Stange - , Institute of Nuclear and Particle Physics, Chair of Particle Physics, TUD Dresden University of Technology (Author)
A. Straessner - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
S. Todt - , Institute of Nuclear and Particle Physics, TUD Dresden University of Technology (Author)
J. C. Voigt - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
J. Manjarres Ramos - , French National Centre for Scientific Research (CNRS) (Author)
H. Torres - , French National Centre for Scientific Research (CNRS) (Author)

University of Adelaide
Université Paris-Saclay
University of Alberta
TRIUMF
Ankara University
TOBB University of Economics and Technology
Laboratoire d'Annecy-le-Vieux de Physique des Particules LAPP

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.

Details

Original language	English
Article number	221801
Pages (from-to)	1-24
Number of pages	24
Journal	Physical review letters
Volume	132
Issue number	22
Publication status	Published - 30 May 2024
Peer-reviewed	Yes

External IDs

PubMed	38877905
ORCID	/0000-0003-0546-1634/work/173516680

Keywords

ASJC Scopus subject areas

General Physics and Astronomy