Measurements of Zγ and Zγγ production in pp collisions at s = 8 TeV with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00465724" target="_blank" >RIV/68378271:_____/16:00465724 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevD.93.112002" target="_blank" >http://dx.doi.org/10.1103/PhysRevD.93.112002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.93.112002" target="_blank" >10.1103/PhysRevD.93.112002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurements of Zγ and Zγγ production in pp collisions at s = 8 TeV with the ATLAS detector

Popis výsledku v původním jazyce

The production of Z bosons with one or two isolated high-energy photons is studied using pp collisions at s=8  TeV. The analyses use a data sample with an integrated luminosity of 20.3  fb-1 collected by the ATLAS detector during the 2012 LHC data taking. The Zγ and Zγγ production cross sections are measured with leptonic (e+e-, μ+μ-, νν) decays of the Z boson, in extended fiducial regions defined in terms of the lepton and photon acceptance. They are then compared to cross-section predictions from the Standard Model, where the sources of the photons are radiation off initial-state quarks and radiative Z-boson decay to charged leptons, and from fragmentation of final-state quarks and gluons into photons. The yields of events with photon transverse energy ET>250  GeV from ℓ+ℓ-γ events and with ET>400  GeV from ννγ events are used to search for anomalous triple gauge-boson couplings ZZγ and Zγγ. The yields of events with diphoton invariant mass mγγ>200  GeV from ℓ+ℓ-γγ events and with mγγ>300  GeV from ννγγ events are used to search for anomalous quartic gauge-boson couplings ZZγγ and Zγγγ. No deviations from Standard Model predictions are observed and limits are placed on parameters used to describe anomalous triple and quartic gauge-boson couplings.nn

Název v anglickém jazyce

Measurements of Zγ and Zγγ production in pp collisions at s = 8 TeV with the ATLAS detector

Popis výsledku anglicky

The production of Z bosons with one or two isolated high-energy photons is studied using pp collisions at s=8  TeV. The analyses use a data sample with an integrated luminosity of 20.3  fb-1 collected by the ATLAS detector during the 2012 LHC data taking. The Zγ and Zγγ production cross sections are measured with leptonic (e+e-, μ+μ-, νν) decays of the Z boson, in extended fiducial regions defined in terms of the lepton and photon acceptance. They are then compared to cross-section predictions from the Standard Model, where the sources of the photons are radiation off initial-state quarks and radiative Z-boson decay to charged leptons, and from fragmentation of final-state quarks and gluons into photons. The yields of events with photon transverse energy ET>250  GeV from ℓ+ℓ-γ events and with ET>400  GeV from ννγ events are used to search for anomalous triple gauge-boson couplings ZZγ and Zγγ. The yields of events with diphoton invariant mass mγγ>200  GeV from ℓ+ℓ-γγ events and with mγγ>300  GeV from ννγγ events are used to search for anomalous quartic gauge-boson couplings ZZγγ and Zγγγ. No deviations from Standard Model predictions are observed and limits are placed on parameters used to describe anomalous triple and quartic gauge-boson couplings.nn

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

—

Svazek periodika

93

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

41

Strana od-do

—

Kód UT WoS článku

000376998900001

EID výsledku v databázi Scopus

2-s2.0-84975100735