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Searches for electroweak production of supersymmetric particles with compressed mass spectra in √s= 13 TeV pp collisions with the ATLAS detector

Contributors

ATLAS Collaboration

Collaborators

Adorni Braccesi Chiassi, Sofia; Akilli, Ece; Amrouche, Cherifa Sabrina; Antel, Claire; Benoit, Mathieu; Clark, Allan Geoffrey; Della Volpe, Domenico; Dubreuil, Arnaud; Ferrere, Didier; Gadatsch, Stefan; Golling, Tobias; Gonzalez Sevilla, Sergio; Iacobucci, Giuseppe; Iizawa, Tomoya; Jansky, Roland; Khoo, Teng Jian; Kiehn, Moritz; Lanfermann, Marie Christine; Lionti, Anthony Eric; Mermod, Philippe; Nessi, Marzio; Nindhito, Herjuno Rah; Paolozzi, Lorenzo; Poggi, Riccardo; Raine, Johnny; Salamani, Dalila; Schramm, Steven; Sfyrla, Anna; Sultan, D M S; Valente, Marco; Vicente Barreto Pinto, Mateus; Wu, Xin; Zaffaroni, Ettore

Published in

Physical review. D, vol. 101, no. 5, 052005

Publication date

2020

First online date

2020-03-11

Abstract

This paper presents results of searches for the electroweak production of supersymmetric particles in models with compressed mass spectra. The searches use 139  fb-1 of s=13  TeV proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider. Events with missing transverse momentum and two same-flavor, oppositely charged, low-transverse-momentum leptons are selected, and are further categorized by the presence of hadronic activity from initial-state radiation or a topology compatible with vector-boson fusion processes. The data are found to be consistent with predictions from the Standard Model. The results are interpreted using simplified models of R-parity-conserving supersymmetry in which the lightest supersymmetric partner is a neutralino with a mass similar to the lightest chargino, the second-to-lightest neutralino, or the slepton. Lower limits on the masses of charginos in different simplified models range from 193 to 240 GeV for moderate mass splittings, and extend down to mass splittings of 1.5 to 2.4 GeV at the LEP chargino bounds (92.4 GeV). Similar lower limits on degenerate light-flavor sleptons extend up to masses of 251 GeV and down to mass splittings of 550 MeV. Constraints on vector-boson fusion production of electroweak SUSY states are also presented.

Keywords

  • Particle Physics Experiments
  • P p: colliding beams
  • Sparticle: pair production
  • Vector boson: fusion
  • P p: scattering
  • Chargino: mass: lower limit
  • Transverse momentum: missing-energy
  • Lepton: transverse momentum
  • Transverse momentum: low
  • Radiation: initial-state interaction
  • Electroweak interaction
  • R parity: invariance
  • Mass difference
  • Supersymmetry: parameter space
  • Mass spectrum
  • Neutralino: LSP
  • Slepton: mass: lower limit
  • ATLAS
  • CERN LHC Coll
  • CERN LEP Stor
  • Initial state
  • Topology
  • Channel cross section: upper limit
  • Experimental results
  • 13000 GeV-cms
  • S046SE
  • S046SMU
  • S046WNO
  • S046ZNO

UNIGE affiliation entities

Citation (ISO format)

ATLAS Collaboration. Searches for electroweak production of supersymmetric particles with compressed mass spectra in √s= 13 TeV pp collisions with the ATLAS detector. In: Physical review. D, 2020, vol. 101, n° 5, p. 052005. doi: 10.1103/physrevd.101.052005

Main files (1)

Article (Published version)
CC BY-4.0

Identifiers

Additional URL for this publication

https://link.aps.org/doi/10.1103/PhysRevD.101.052005

Journal ISSN

2470-0010
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26downloads

Technical informations

Creation

24/06/2024 08:02:44

First validation

25/06/2024 06:21:05

Update

13/10/2025 13:40:29

Status update

25/06/2024 06:21:05

Last indexation

10/11/2026 18:01:51
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