Measurement of isolated-photon pair production in pp collisions at √s =7 TeV with the ATLAS detector
The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at √s = 7 TeV . The full data set collected in 2011, corresponding to an integrated luminosity of 4.9 fb[superscript −1], is used. The amount...
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| Format: | Article |
| Language: | en_US |
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Springer-Verlag
2014
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| Online Access: | http://hdl.handle.net/1721.1/86126 https://orcid.org/0000-0002-7586-7253 |
| _version_ | 1811077234640814080 |
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| author | Taylor, Frank E. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Taylor, Frank E. |
| author_sort | Taylor, Frank E. |
| collection | MIT |
| description | The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at √s = 7 TeV . The full data set collected in 2011, corresponding to an integrated luminosity of 4.9 fb[superscript −1], is used. The amount of background, from hadronic jets and isolated electrons, is estimated with data-driven techniques and subtracted. The total cross section, for two isolated photons with transverse energies above 25 GeV and 22 GeV respectively, in the acceptance of the electromagnetic calorimeter (|η| < 1.37 and 1.52 < |η| < 2.37) and with an angular separation ΔR > 0.4, is 44.0[+3.2 over −4.2] pb. The differential cross sections as a function of the di-photon invariant mass, transverse momentum, azimuthal separation, and cosine of the polar angle of the largest transverse energy photon in the Collins-Soper di-photon rest frame are also measured. The results are compared to the prediction of leading-order parton-shower and next-to-leading-order and next-to-next-to-leading-order parton-level generators. |
| first_indexed | 2024-09-23T10:39:47Z |
| format | Article |
| id | mit-1721.1/86126 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:39:47Z |
| publishDate | 2014 |
| publisher | Springer-Verlag |
| record_format | dspace |
| spelling | mit-1721.1/861262022-09-30T22:06:18Z Measurement of isolated-photon pair production in pp collisions at √s =7 TeV with the ATLAS detector Taylor, Frank E. Massachusetts Institute of Technology. Department of Physics Taylor, Frank E. The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at √s = 7 TeV . The full data set collected in 2011, corresponding to an integrated luminosity of 4.9 fb[superscript −1], is used. The amount of background, from hadronic jets and isolated electrons, is estimated with data-driven techniques and subtracted. The total cross section, for two isolated photons with transverse energies above 25 GeV and 22 GeV respectively, in the acceptance of the electromagnetic calorimeter (|η| < 1.37 and 1.52 < |η| < 2.37) and with an angular separation ΔR > 0.4, is 44.0[+3.2 over −4.2] pb. The differential cross sections as a function of the di-photon invariant mass, transverse momentum, azimuthal separation, and cosine of the polar angle of the largest transverse energy photon in the Collins-Soper di-photon rest frame are also measured. The results are compared to the prediction of leading-order parton-shower and next-to-leading-order and next-to-next-to-leading-order parton-level generators. United States. Dept. of Energy National Science Foundation (U.S.) Brookhaven National Laboratory 2014-04-11T19:09:41Z 2014-04-11T19:09:41Z 2013-01 2012-12 Article http://purl.org/eprint/type/JournalArticle 1029-8479 1126-6708 http://hdl.handle.net/1721.1/86126 Aad, G., T. Abajyan, B. Abbott, J. Abdallah, S. Abdel Khalek, A. A. Abdelalim, O. Abdinov, et al. “Measurement of Isolated-Photon Pair Production in Pp Collisions at √s =7 TeV with the ATLAS Detector.” J. High Energ. Phys. 2013, no. 1 (January 2013). © CERN, for the benefit of the ATLAS collaboration https://orcid.org/0000-0002-7586-7253 en_US http://dx.doi.org/10.1007/JHEP01(2013)086 Journal of High Energy Physics Creative Commons Attribution http://creativecommons.org/licenses/by/3.0/ application/pdf Springer-Verlag Springer |
| spellingShingle | Taylor, Frank E. Measurement of isolated-photon pair production in pp collisions at √s =7 TeV with the ATLAS detector |
| title | Measurement of isolated-photon pair production in pp collisions at √s =7 TeV with the ATLAS detector |
| title_full | Measurement of isolated-photon pair production in pp collisions at √s =7 TeV with the ATLAS detector |
| title_fullStr | Measurement of isolated-photon pair production in pp collisions at √s =7 TeV with the ATLAS detector |
| title_full_unstemmed | Measurement of isolated-photon pair production in pp collisions at √s =7 TeV with the ATLAS detector |
| title_short | Measurement of isolated-photon pair production in pp collisions at √s =7 TeV with the ATLAS detector |
| title_sort | measurement of isolated photon pair production in pp collisions at √s 7 tev with the atlas detector |
| url | http://hdl.handle.net/1721.1/86126 https://orcid.org/0000-0002-7586-7253 |
| work_keys_str_mv | AT taylorfranke measurementofisolatedphotonpairproductioninppcollisionsats7tevwiththeatlasdetector |