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Measurements of $W\gamma$ and $Z\gamma$ production in $pp$ collisions at $\sqrt{s}$ =7  TeV with the ATLAS detector at the LHC


ATLAS Collaboration; Abbott, B; Aad, G; Abajyan, T; Canelli, F; et al (2015). Measurements of $W\gamma$ and $Z\gamma$ production in $pp$ collisions at $\sqrt{s}$ =7 TeV with the ATLAS detector at the LHC. Physical Review D (Particles, Fields, Gravitation and Cosmology), 87:112003.

Abstract

The integrated and differential fiducial cross sections for the production of a $W$ or $Z$ boson in association with a high-energy photon are measured using $pp$ collisions at $\sqrt{s}$ = 7 TeV. The analyses use a data sample with an integrated luminosity of $4.6 fb^{-1}$ collected by the ATLAS detector during the 2011 LHC data-taking period. Events are selected using leptonic decays of the $W$ and $Z$ bosons $[W(e \nu,\mu \nu]$ and $Z(e^+ e^-, \mu^+ \mu^-, \nu \bar{\nu}))$ with the requirement of an associated isolated photon. The data are used to test the electroweak sector of the Standard Model and search for evidence for new phenomena. The measurements are used to probe the anomalous $WW\gamma$, $ZZ\gamma$ and $Z\gamma\gamma$ triple-gauge-boson couplings and to search for the production of vector resonances decaying to $Z\gamma$ and $W\gamma$. No deviations from Standard Model predictions are observed and limits are placed on anomalous triple-gauge-boson couplings and on the production of new vector meson resonances.

Abstract

The integrated and differential fiducial cross sections for the production of a $W$ or $Z$ boson in association with a high-energy photon are measured using $pp$ collisions at $\sqrt{s}$ = 7 TeV. The analyses use a data sample with an integrated luminosity of $4.6 fb^{-1}$ collected by the ATLAS detector during the 2011 LHC data-taking period. Events are selected using leptonic decays of the $W$ and $Z$ bosons $[W(e \nu,\mu \nu]$ and $Z(e^+ e^-, \mu^+ \mu^-, \nu \bar{\nu}))$ with the requirement of an associated isolated photon. The data are used to test the electroweak sector of the Standard Model and search for evidence for new phenomena. The measurements are used to probe the anomalous $WW\gamma$, $ZZ\gamma$ and $Z\gamma\gamma$ triple-gauge-boson couplings and to search for the production of vector resonances decaying to $Z\gamma$ and $W\gamma$. No deviations from Standard Model predictions are observed and limits are placed on anomalous triple-gauge-boson couplings and on the production of new vector meson resonances.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Date:2015
Deposited On:18 Feb 2016 10:26
Last Modified:08 Dec 2017 18:19
Publisher:American Physical Society
ISSN:1550-2368
Publisher DOI:https://doi.org/10.1103/PhysRevD.87.112003
Other Identification Number:arXiv:1302.1283v2

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