Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at root s=13 TeV
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10407746" target="_blank" >RIV/00216208:11320/19:10407746 - isvavai.cz</a>
Výsledek na webu
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=6YaF_I0lOg" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=6YaF_I0lOg</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP10(2019)139" target="_blank" >10.1007/JHEP10(2019)139</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at root s=13 TeV
Popis výsledku v původním jazyce
A search is presented for a Higgs boson that is produced in association with a Z boson and that decays to an undetected particle together with an isolated photon. The search is performed by the CMS Collaboration at the Large Hadron Collider using a data set corresponding to an integrated luminosity of 137 fb(-1) recorded at a center-of-mass energy of 13 TeV. No significant excess of events above the expectation from the standard model background is found. The results are interpreted in the context of a theoretical model in which the undetected particle is a massless dark photon. An upper limit is set on the product of the cross section for associated Higgs and Z boson production and the branching fraction for such a Higgs boson decay, as a function of the Higgs boson mass. For a mass of 125 GeV, assuming the standard model production cross section, this corresponds to an observed (expected) upper limit on this branching fraction of 4.6 (3.6)% at 95% confidence level. These are the first limits on Higgs boson decays to final states that include an undetected massless dark photon.
Název v anglickém jazyce
Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at root s=13 TeV
Popis výsledku anglicky
A search is presented for a Higgs boson that is produced in association with a Z boson and that decays to an undetected particle together with an isolated photon. The search is performed by the CMS Collaboration at the Large Hadron Collider using a data set corresponding to an integrated luminosity of 137 fb(-1) recorded at a center-of-mass energy of 13 TeV. No significant excess of events above the expectation from the standard model background is found. The results are interpreted in the context of a theoretical model in which the undetected particle is a massless dark photon. An upper limit is set on the product of the cross section for associated Higgs and Z boson production and the branching fraction for such a Higgs boson decay, as a function of the Higgs boson mass. For a mass of 125 GeV, assuming the standard model production cross section, this corresponds to an observed (expected) upper limit on this branching fraction of 4.6 (3.6)% at 95% confidence level. These are the first limits on Higgs boson decays to final states that include an undetected massless dark photon.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10303 - Particles and field physics
Návaznosti výsledku
Projekt
<a href="/cs/project/LM2015058" target="_blank" >LM2015058: Výzkumná infrastruktura pro experimenty v CERN</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2019
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 [online]
ISSN
1029-8479
e-ISSN
—
Svazek periodika
2019
Číslo periodika v rámci svazku
10
Stát vydavatele periodika
DE - Spolková republika Německo
Počet stran výsledku
37
Strana od-do
139
Kód UT WoS článku
000492982300001
EID výsledku v databázi Scopus
2-s2.0-85074147634