| dc.creator | Alconada Verzini, María Josefina | |
| dc.creator | Alonso, Francisco | |
| dc.creator | Arduh, Francisco Anuar | |
| dc.creator | Dova, María Teresa | |
| dc.creator | Monticelli, Fernando Gabriel | |
| dc.creator | Wahlberg, Hernán Pablo | |
| dc.creator | The ATLAS Collaboration | |
| dc.date | 2016 | |
| dc.date | 2019-12-04T17:25:17Z | |
| dc.date.accessioned | 2023-07-14T17:26:23Z | |
| dc.date.available | 2023-07-14T17:26:23Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/86795 | |
| dc.identifier | issn:2470-0010 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7427490 | |
| dc.description | 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<sup>-1</sup> collected by the ATLAS detector during the 2012 LHC data taking. The Zγ and Zγγ production cross sections are measured with leptonic (e<sup>+</sup>e<sup>-</sup>, μ<sup>+</sup>μ<sup>-</sup>, 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 E<sub>T</sub>>250 GeV from ℓ<sup>+</sup>ℓ<sup>-</sup>γ events and with E<sub>T</sub>>400 GeV from νν¯γ events are used to search for anomalous triple gauge-boson couplings ZZγ and Zγγ. The yields of events with diphoton invariant mass m<sub>γγ</sub>>200 GeV from ℓ<sup>+</sup>ℓ<sup>-</sup>γγ events and with m<sub>γγ</sub>>300 GeV from νν¯γγ 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. | |
| dc.description | La lista completa de autores que integran el documento puede consultarse en el archivo. | |
| dc.description | Facultad de Ciencias Exactas | |
| dc.description | Instituto de Física La Plata | |
| dc.format | application/pdf | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by/3.0/ | |
| dc.rights | Creative Commons Attribution 3.0 Unported (CC BY 3.0) | |
| dc.subject | Ciencias Exactas | |
| dc.subject | Física | |
| dc.subject | proton-proton collisions | |
| dc.subject | ATLAS detector | |
| dc.title | Measurements of Zγ and Zγγ production in pp collisions at √s = 8 TeV with the ATLAS detector | |
| dc.type | Articulo | |
| dc.type | Articulo | |
