PoS - Proceedings of Science
Volume 276 - Fourth Annual Large Hadron Collider Physics (LHCP2016) - Poster: QCD physics at hadron colliders
Measurements of Zgamma and Zgammagamma production in pp collisions at $\sqrt{s}$=8TeV with the ATLAS detector
D. Krasnopevtsev*  on behalf of the ATLAS Collaboration
Full text: pdf
Pre-published on: March 03, 2017
Published on: March 28, 2017
Abstract
The production of Z bosons with one or two isolated high-energy photons is studied using $pp$ collisions at $\sqrt{s}$ = 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 data taking at the LHC. The data are used to make tests of the electroweak sector of the Standard Model (SM) and search for deviations that could provide evidence for new physics beyond SM. The $Z\gamma$ and $Z\gamma\gamma$ production cross sections are measured with leptonic decays of the Z boson and then compared to cross-section predictions from the SM. A high transverse energy of the photon in $\ell^{+}\ell^{-}\gamma$ and $\nu\bar{\nu}\gamma$ events was required to search for anomalous triple gauge-boson couplings $ZZ\gamma$ and $Z\gamma\gamma$, while the yields of events with high diphoton invariant mass from $\ell^{+}\ell^{-}\gamma\gamma$ and $\nu\bar{\nu}\gamma\gamma$ 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 gauge-boson couplings.
DOI: https://doi.org/10.22323/1.276.0229
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.