Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in pp collisions at CMS = 13 TeV with the ATLAS detector
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10475971" target="_blank" >RIV/00216208:11320/23:10475971 - isvavai.cz</a>
Výsledek na webu
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=DRRP3HWYyh" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=DRRP3HWYyh</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP06(2023)153" target="_blank" >10.1007/JHEP06(2023)153</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in pp collisions at CMS = 13 TeV with the ATLAS detector
Popis výsledku v původním jazyce
A search for light long-lived neutral particles with masses in the O(MeV-GeV)range is presented. The analysis targets the production of long-lived dark photons in thedecay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson.Events that contain displaced collimated Standard Model fermions reconstructed in thecalorimeter or muon spectrometer are selected in 139 fb-1 of ps = 13TeV pp collisiondata collected by the ATLAS detector at the LHC. Background estimates for contributionsfrom Standard Model processes and instrumental effects are extracted from data. Theobserved event yields are consistent with the expected background. Exclusion limits arereported on the production cross-section times branching fraction as a function of the meanproper decay length c of the dark photon, or as a function of the dark-photon mass andkinetic mixing parameter that quantifies the coupling between the Standard Model andpotential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excludedat 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean properdecay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeVand 2 GeV.
Název v anglickém jazyce
Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in pp collisions at CMS = 13 TeV with the ATLAS detector
Popis výsledku anglicky
A search for light long-lived neutral particles with masses in the O(MeV-GeV)range is presented. The analysis targets the production of long-lived dark photons in thedecay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson.Events that contain displaced collimated Standard Model fermions reconstructed in thecalorimeter or muon spectrometer are selected in 139 fb-1 of ps = 13TeV pp collisiondata collected by the ATLAS detector at the LHC. Background estimates for contributionsfrom Standard Model processes and instrumental effects are extracted from data. Theobserved event yields are consistent with the expected background. Exclusion limits arereported on the production cross-section times branching fraction as a function of the meanproper decay length c of the dark photon, or as a function of the dark-photon mass andkinetic mixing parameter that quantifies the coupling between the Standard Model andpotential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excludedat 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean properdecay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeVand 2 GeV.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10300 - Physical sciences
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2023
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of High Energy Physics
ISSN
1029-8479
e-ISSN
1029-8479
Svazek periodika
2023
Číslo periodika v rámci svazku
06
Stát vydavatele periodika
DE - Spolková republika Německo
Počet stran výsledku
55
Strana od-do
153
Kód UT WoS článku
001035251600001
EID výsledku v databázi Scopus
2-s2.0-85168534924