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
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...
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Autores principales: | , , , , , , , |
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Formato: | Articulo |
Lenguaje: | Inglés |
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2020
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/126822 |
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I19-R120-10915-126822 |
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institution |
Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
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SEDICI (UNLP) |
language |
Inglés |
topic |
Física Particle physics Physics Scalar boson Higgs boson Lepton Physics beyond the standard model Dark photon Collimated light Branching fraction Large hadron collider |
spellingShingle |
Física Particle physics Physics Scalar boson Higgs boson Lepton Physics beyond the standard model Dark photon Collimated light Branching fraction Large hadron collider Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Wahlberg, Hernán Pablo The ATLAS Collaboration 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 |
topic_facet |
Física Particle physics Physics Scalar boson Higgs boson Lepton Physics beyond the standard model Dark photon Collimated light Branching fraction Large hadron collider |
description |
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. |
format |
Articulo Articulo |
author |
Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Wahlberg, Hernán Pablo The ATLAS Collaboration |
author_facet |
Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Wahlberg, Hernán Pablo The ATLAS Collaboration |
author_sort |
Alonso, Francisco |
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 |
title_short |
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 |
title_full |
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 |
title_fullStr |
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 |
title_full_unstemmed |
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 |
title_sort |
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 |
publishDate |
2020 |
url |
http://sedici.unlp.edu.ar/handle/10915/126822 |
work_keys_str_mv |
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bdutipo_str |
Repositorios |
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1764820451235725314 |