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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Alonso, Francisco, Arduh, Francisco Anuar, Dova, María Teresa, Hoya, Joaquín, Monticelli, Fernando Gabriel, Orellana, Gonzalo Enrique, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126822
Aporte de:
id I19-R120-10915-126822
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection 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 AT alonsofrancisco searchforlightlonglivedneutralparticlesproducedinppcollisionsats13tevanddecayingintocollimatedleptonsorlighthadronswiththeatlasdetector
AT arduhfranciscoanuar searchforlightlonglivedneutralparticlesproducedinppcollisionsats13tevanddecayingintocollimatedleptonsorlighthadronswiththeatlasdetector
AT dovamariateresa searchforlightlonglivedneutralparticlesproducedinppcollisionsats13tevanddecayingintocollimatedleptonsorlighthadronswiththeatlasdetector
AT hoyajoaquin searchforlightlonglivedneutralparticlesproducedinppcollisionsats13tevanddecayingintocollimatedleptonsorlighthadronswiththeatlasdetector
AT monticellifernandogabriel searchforlightlonglivedneutralparticlesproducedinppcollisionsats13tevanddecayingintocollimatedleptonsorlighthadronswiththeatlasdetector
AT orellanagonzaloenrique searchforlightlonglivedneutralparticlesproducedinppcollisionsats13tevanddecayingintocollimatedleptonsorlighthadronswiththeatlasdetector
AT wahlberghernanpablo searchforlightlonglivedneutralparticlesproducedinppcollisionsats13tevanddecayingintocollimatedleptonsorlighthadronswiththeatlasdetector
AT theatlascollaboration searchforlightlonglivedneutralparticlesproducedinppcollisionsats13tevanddecayingintocollimatedleptonsorlighthadronswiththeatlasdetector
bdutipo_str Repositorios
_version_ 1764820451235725314