Measurement of the mass difference between top and anti-top quarks in pp collisions at √s = 7 TeV using the ATLAS detector
A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb[superscript −1] data sample of proton–proton collisions at √s = 7 TeV recorded with the ATLAS detector at the LHC, events consistent with t[¯ over t] production and decay into a single charged lepton final...
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| Format: | Article |
| Language: | en_US |
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Elsevier
2014
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| Online Access: | http://hdl.handle.net/1721.1/87569 https://orcid.org/0000-0002-7586-7253 |
| _version_ | 1811086733856473088 |
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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 | A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb[superscript −1] data sample of proton–proton collisions at √s = 7 TeV recorded with the ATLAS detector at the LHC, events consistent with t[¯ over t] production and decay into a single charged lepton final state are reconstructed. For each event, the mass difference between the top and anti-top quark candidate is calculated. A two b -tag requirement is used in order to reduce the background contribution. A maximum likelihood fit to these per-event mass differences yields Δm ≡ m[subscript t] − m[subscript ¯ over t] = 0.67 ± 0.61 (stat) ± 0.41 (syst) GeV, consistent with CPT invariance. |
| first_indexed | 2024-09-23T13:33:35Z |
| format | Article |
| id | mit-1721.1/87569 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:33:35Z |
| publishDate | 2014 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/875692022-10-01T15:40:02Z Measurement of the mass difference between top and anti-top quarks in pp collisions at √s = 7 TeV using the ATLAS detector Taylor, Frank E. Massachusetts Institute of Technology. Department of Physics Taylor, Frank E. A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb[superscript −1] data sample of proton–proton collisions at √s = 7 TeV recorded with the ATLAS detector at the LHC, events consistent with t[¯ over t] production and decay into a single charged lepton final state are reconstructed. For each event, the mass difference between the top and anti-top quark candidate is calculated. A two b -tag requirement is used in order to reduce the background contribution. A maximum likelihood fit to these per-event mass differences yields Δm ≡ m[subscript t] − m[subscript ¯ over t] = 0.67 ± 0.61 (stat) ± 0.41 (syst) GeV, consistent with CPT invariance. United States. Dept. of Energy National Science Foundation (U.S.) Brookhaven National Laboratory 2014-05-29T16:43:46Z 2014-05-29T16:43:46Z 2013-12 2013-11 Article http://purl.org/eprint/type/JournalArticle 03702693 http://hdl.handle.net/1721.1/87569 Aad, G. et al. “Measurement of the Mass Difference Between Top and Anti-Top Quarks in Pp Collisions at √s = 7 TeV Using the ATLAS Detector.” Physics Letters B 728 (January 2014): 363–379. https://orcid.org/0000-0002-7586-7253 en_US http://dx.doi.org/10.1016/j.physletb.2013.12.010 Physics Letters B Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Elsevier Elsevier |
| spellingShingle | Taylor, Frank E. Measurement of the mass difference between top and anti-top quarks in pp collisions at √s = 7 TeV using the ATLAS detector |
| title | Measurement of the mass difference between top and anti-top quarks in pp collisions at √s = 7 TeV using the ATLAS detector |
| title_full | Measurement of the mass difference between top and anti-top quarks in pp collisions at √s = 7 TeV using the ATLAS detector |
| title_fullStr | Measurement of the mass difference between top and anti-top quarks in pp collisions at √s = 7 TeV using the ATLAS detector |
| title_full_unstemmed | Measurement of the mass difference between top and anti-top quarks in pp collisions at √s = 7 TeV using the ATLAS detector |
| title_short | Measurement of the mass difference between top and anti-top quarks in pp collisions at √s = 7 TeV using the ATLAS detector |
| title_sort | measurement of the mass difference between top and anti top quarks in pp collisions at √s 7 tev using the atlas detector |
| url | http://hdl.handle.net/1721.1/87569 https://orcid.org/0000-0002-7586-7253 |
| work_keys_str_mv | AT taylorfranke measurementofthemassdifferencebetweentopandantitopquarksinppcollisionsats7tevusingtheatlasdetector |