Search for long-lived, massive particles in events with displaced vertices and multiple jets in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
| Autor: | ATLAS Collaboration |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
p p: scattering
track data analysis: vertex lifetime [sparticle] data analysis method sparticle: lifetime massive [particle] 13000 GeV-cms mass: lower limit channel cross section: upper limit pair production [sparticle] vertex [track data analysis] decay modes particle: massive search for [new physics] long-lived [particle] scattering [p p] R parity: violation violation [R parity] background upper limit [channel cross section] new physics: search for ATLAS sensitivity tracks sparticle: pair production CERN LHC Coll lower limit [mass] particle: long-lived colliding beams [p p] p p: colliding beams experimental results |
| DOI: | 10.3204/PUBDB-2022-07349 |
| Popis: | 26 pp. (2022). A search for long-lived particles decaying into hadrons is presented. The analysis uses 139 fb$^{-1}$ of $pp$ collision data collected at $\sqrt{s} = 13$ TeV by the ATLAS detector at the LHC using events that contain multiple energetic jets and a displaced vertex. The search employs dedicated reconstruction techniques that significantly increase the sensitivity to long-lived particle decays that occur in the ATLAS inner detector. Background estimates for Standard Model processes and instrumental effects are extracted from data. The observed event yields are compatible with those expected from background processes. The results are used to set limits at 95% confidence level on model-independent cross sections for processes beyond the Standard Model, and on scenarios with pair-production of supersymmetric particles with long-lived electroweakinos that decay via a small $R$-parity-violating coupling. Electroweakino masses below 1.5 TeV are excluded for mean proper lifetimes in the range from 0.03 ns to 1 ns. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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