Search for light long-lived neutral particles produced in pp collisions at √s=13TeV and decaying into collimated leptons or light hadrons with the ATLAS detector

Research output: Contribution to journalArticle

Bibtex

@article{e141b0a21a404d829214a2c0959474ad,
title = "Search for light long-lived neutral particles produced in pp collisions at √s=13TeV and decaying into collimated leptons or light hadrons with the ATLAS detector",
abstract = "Several models of physics beyond the Standard Model predict the existence of dark photons, light neutral particles decaying into collimated leptons or light hadrons. This paper presents a search for long-lived dark photons produced from the decay of a Higgs boson or a heavy scalar boson and decaying into displaced collimated Standard Model fermions. The search uses data corresponding to an integrated luminosity of 36.1 fb- 1 collected in proton–proton collisions at s=13 Te recorded in 2015–2016 with the ATLAS detector at the Large Hadron Collider. The observed number of events is consistent with the expected background, and limits on the production cross section times branching fraction as a function of the proper decay length of the dark photon are reported. A cross section times branching fraction above 4 pb is excluded for a Higgs boson decaying into two dark photons for dark-photon decay lengths between 1.5 mm and 307 mm.",
author = "{ATLAS Collaboration} and G Aad and Torsten {\AA}kesson and Simona Bocchetta and Lene Bryngemark and Corrigan, {Eric Edward} and Caterina Doglioni and Kristian Gregersen and {Brottmann Hansen}, Eva and Vincent Hedberg and G{\"o}ran Jarlskog and Charles Kalderon and Edgar Kellermann and Balazs Konya and Else Lytken and Katja Mankinen and Caterina Marcon and Ulf Mj{\"o}rnmark and Mullier, {Geoffrey Andr{\'e} Adrien} and Ruth P{\"o}ttgen and Trine Poulsen and Eleni Skorda and Oxana Smirnova and L. Zwalinski",
year = "2020",
month = "5",
day = "20",
doi = "10.1140/epjc/s10052-020-7997-4",
language = "English",
volume = "80",
journal = "European Physical Journal C. Particles and Fields",
issn = "1434-6044",
publisher = "Springer",
number = "5",

}