The European Physical Journal C > 2019 > 79 > 6 > 1-31
Search for long-lived neutral particles in pp collisions at $${\sqrt{s}} = 13~{\text { TeV}}$$ s=13TeV that decay into displaced hadronic jets in the ATLAS calorimeter
Source
Abstract
This paper describes a search for pairs of neutral, long-lived particles decaying in the ATLAS calorimeter. Long-lived particles occur in many extensions to the Standard Model and may elude searches for new promptly decaying particles. The analysis considers neutral, long-lived scalars with masses between 5 and 400 GeV, produced from decays of heavy bosons with masses between $$125$$ 125 and $$1000$$ 1000 GeV, where the long-lived scalars decay into Standard Model fermions. The analysis uses either $$10.8~{\hbox {fb}}^{-1}$$ 10.8fb-1 or $$33.0~{\hbox {fb}}^{-1}$$ 33.0fb-1 of data (depending on the trigger) recorded in 2016 at the LHC with the ATLAS detector in proton–proton collisions at a centre-of-mass energy of 13 TeV. No significant excess is observed, and limits are reported on the production cross section times branching ratio as a function of the proper decay length of the long-lived particles.
Identifiers
journal ISSN : | 1434-6044 |
journal e-ISSN : | 1434-6052 |
DOI | 10.1140/epjc/s10052-019-6962-6 |