Measurements of Z gamma and Z gamma gamma production in pp collisions at root s=8 TeV with the ATLAS detector

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10335206" target="_blank" >RIV/00216208:11320/16:10335206 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21220/16:00306857 RIV/68407700:21340/16:00306857 RIV/68407700:21670/16:00306857 RIV/61989592:15310/16:33159365

Result on the web

<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>

Result language

angličtina

Original language name

Measurements of Z gamma and Z gamma gamma production in pp collisions at root s=8 TeV with the ATLAS detector

Original language description

The production of Z bosons with one or two isolated high-energy photons is studied using pp collisions at root 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 Z gamma and Z gamma gamma production cross sections are measured with leptonic (e(+) e(-), mu(+) mu(-), nu(nu) over bar) 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 E-T > 250 GeV from l(+) l(-) gamma events and with E-T > 400 GeV from nu(nu) over bar gamma events are used to search for anomalous triple gauge-boson couplings ZZ gamma and Z gamma gamma. The yields of events with diphoton invariant mass m(gamma gamma) > 200 GeV from l(+) l(-) gamma gamma events and with m(gamma gamma) > 300 GeV from nu(nu) over bar gamma gamma events are used to search for anomalous quartic gauge-boson couplings ZZ gamma gamma and Z gamma gamma gamma. No deviations from Standard Model predictions are observed and limits are placed on parameters used to describe anomalous triple and quartic gauge-boson couplings.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BF - Elementary particle theory and high energy physics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Name of the periodical

PHYSICAL REVIEW D

ISSN

2470-0010

e-ISSN

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Volume of the periodical

93

Issue of the periodical within the volume

11

Country of publishing house

US - UNITED STATES

Number of pages

41

Pages from-to

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UT code for WoS article

000376998900001

EID of the result in the Scopus database

2-s2.0-84975100735