Measurement of the production of a W boson in association with a charm quark in pp collisions at √s = 7 TeV with the ATLAS detector
The production of a W boson in association with a single charm quark is studied using 4.6 fb[superscript −1] of pp collision data at √s = 7 TeV collected with the ATLAS detector at the Large Hadron Collider. In events in which a W boson decays to an electron or muon, the charm quark is tagged either...
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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/1721.1/89410 https://orcid.org/0000-0002-7586-7253 |
| _version_ | 1826217682042617856 |
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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 production of a W boson in association with a single charm quark is studied using 4.6 fb[superscript −1] of pp collision data at √s = 7 TeV collected with the ATLAS detector at the Large Hadron Collider. In events in which a W boson decays to an electron or muon, the charm quark is tagged either by its semileptonic decay to a muon or by the presence of a charmed meson. The integrated and differential cross sections as a function of the pseudorapidity of the lepton from the W-boson decay are measured. Results are compared to the predictions of next-to-leading-order QCD calculations obtained from various parton distribution function parameterisations. The ratio of the strange-to-down sea-quark distributions is determined to be 0.96[+0.26 over −0.30] at Q [superscript 2] = 1.9 GeV[superscript 2], which supports the hypothesis of an SU(3)-symmetric composition of the light-quark sea. Additionally, the cross-section ratio σ(W [superscript +] + [bar over c])/σ(W [superscript −] + c) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions about the s − [bar over s] quark asymmetry. |
| first_indexed | 2024-09-23T17:07:29Z |
| format | Article |
| id | mit-1721.1/89410 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T17:07:29Z |
| publishDate | 2014 |
| publisher | Springer-Verlag |
| record_format | dspace |
| spelling | mit-1721.1/894102022-10-03T10:32:50Z Measurement of the production of a W boson in association with a charm quark 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 production of a W boson in association with a single charm quark is studied using 4.6 fb[superscript −1] of pp collision data at √s = 7 TeV collected with the ATLAS detector at the Large Hadron Collider. In events in which a W boson decays to an electron or muon, the charm quark is tagged either by its semileptonic decay to a muon or by the presence of a charmed meson. The integrated and differential cross sections as a function of the pseudorapidity of the lepton from the W-boson decay are measured. Results are compared to the predictions of next-to-leading-order QCD calculations obtained from various parton distribution function parameterisations. The ratio of the strange-to-down sea-quark distributions is determined to be 0.96[+0.26 over −0.30] at Q [superscript 2] = 1.9 GeV[superscript 2], which supports the hypothesis of an SU(3)-symmetric composition of the light-quark sea. Additionally, the cross-section ratio σ(W [superscript +] + [bar over c])/σ(W [superscript −] + c) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions about the s − [bar over s] quark asymmetry. United States. Dept. of Energy National Science Foundation (U.S.) Brookhaven National Laboratory 2014-09-10T15:29:33Z 2014-09-10T15:29:33Z 2014-05 2014-04 Article http://purl.org/eprint/type/JournalArticle 1029-8479 1126-6708 http://hdl.handle.net/1721.1/89410 Aad, G., T. Abajyan, B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, et al. “Measurement of the Production of a W Boson in Association with a Charm Quark in Pp Collisions at √s = 7 TeV with the ATLAS Detector.” J. High Energ. Phys. 2014, no. 5 (May 2014). © CERN, for the benefit of the ATLAS Collaboration https://orcid.org/0000-0002-7586-7253 en_US http://dx.doi.org/10.1007/jhep05(2014)068 Journal of High Energy Physics Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Springer-Verlag Springer-Verlag |
| spellingShingle | Taylor, Frank E. Measurement of the production of a W boson in association with a charm quark in pp collisions at √s = 7 TeV with the ATLAS detector |
| title | Measurement of the production of a W boson in association with a charm quark in pp collisions at √s = 7 TeV with the ATLAS detector |
| title_full | Measurement of the production of a W boson in association with a charm quark in pp collisions at √s = 7 TeV with the ATLAS detector |
| title_fullStr | Measurement of the production of a W boson in association with a charm quark in pp collisions at √s = 7 TeV with the ATLAS detector |
| title_full_unstemmed | Measurement of the production of a W boson in association with a charm quark in pp collisions at √s = 7 TeV with the ATLAS detector |
| title_short | Measurement of the production of a W boson in association with a charm quark in pp collisions at √s = 7 TeV with the ATLAS detector |
| title_sort | measurement of the production of a w boson in association with a charm quark in pp collisions at √s 7 tev with the atlas detector |
| url | http://hdl.handle.net/1721.1/89410 https://orcid.org/0000-0002-7586-7253 |
| work_keys_str_mv | AT taylorfranke measurementoftheproductionofawbosoninassociationwithacharmquarkinppcollisionsats7tevwiththeatlasdetector |