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https://hdl.handle.net/2440/115078
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Type: | Journal article |
Title: | Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector |
Other Titles: | Measurement of the tt -bar gamma production cross section in proton-proton collisions at root s=8 TeV with the ATLAS detector |
Author: | Aaboud, M. Aad, G. Abbott, B. Abdinov, O. Abeloos, B. Abidi, S. AbouZeid, O. Abraham, N. Abramowicz, H. Abreu, H. Abreu, R. Abulaiti, Y. Acharya, B. Adachi, S. Adamczyk, L. Adelman, J. Adersberger, M. Adye, T. Affolder, A. Agatonovic-Jovin, T. et al. |
Citation: | The Journal of High Energy Physics, 2017; 2017(11):086-1-086-41 |
Publisher: | Springer |
Issue Date: | 2017 |
ISSN: | 1126-6708 1029-8479 |
Statement of Responsibility: | M. Aaboud, G. Aad ... Paul D. Jackson … Lawrence Lee-Jr … Andreas Petridis … Martin White … et al. (ATLAS Collaboration) |
Abstract: | The cross section of a top-quark pair produced in association with a photon is measured in proton-proton collisions at a centre-of-mass energy of s√=8 TeV with 20.2 fb−1 of data collected by the ATLAS detector at the Large Hadron Collider in 2012. The measurement is performed by selecting events that contain a photon with transverse momentum pT > 15 GeV, an isolated lepton with large transverse momentum, large missing transverse momentum, and at least four jets, where at least one is identified as originating from a b-quark. The production cross section is measured in a fiducial region close to the selection requirements. It is found to be 139 ± 7 (stat.) ± 17 (syst.) fb, in good agreement with the theoretical prediction at next-to-leading order of 151 ± 24 fb. In addition, differential cross sections in the fiducial region are measured as a function of the transverse momentum and pseudorapidity of the photon. |
Keywords: | Hadron-Hadron scattering (experiments); top physics |
Rights: | © The Author(s) 2017. This article is published under an open access license. Please check the 'Copyright Information' section for details of this license and what re-use is permitted. If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and re-use information, please contact the Rights and Permissions team. |
DOI: | 10.1007/JHEP11(2017)086 |
Published version: | http://dx.doi.org/10.1007/jhep11(2017)086 |
Appears in Collections: | Aurora harvest 3 Physics publications |
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