Measurement of the fraction of t(t)over-bar production via gluon-gluon fusion in p(p)over-bar collisions at root s=1.96 Tev
We present a measurement of the ratio of the tt̅ production cross section via gluon-gluon fusion to the total tt̅ production cross section in pp̅ collisions at √s=1.96 TeV at the Tevatron. Using a data sample with an integrated luminosity of 955 pb[superscript -1] recorded by the CDF II detecto...
| Main Authors: | , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/50641 |
| _version_ | 1811092578649505792 |
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| author | Xie, Si Knuteson, Bruce O. Henderson, C. Hahn, Kristian Allan Goncharov, Maxim Gomez-Ceballos, Guillelmo Choudalakis, Georgios Makhoul, Khaldoun Bauer, Gerry P |
| author2 | Massachusetts Institute of Technology. Laboratory for Nuclear Science |
| author_facet | Massachusetts Institute of Technology. Laboratory for Nuclear Science Xie, Si Knuteson, Bruce O. Henderson, C. Hahn, Kristian Allan Goncharov, Maxim Gomez-Ceballos, Guillelmo Choudalakis, Georgios Makhoul, Khaldoun Bauer, Gerry P |
| author_sort | Xie, Si |
| collection | MIT |
| description | We present a measurement of the ratio of the tt̅ production cross section via gluon-gluon fusion to the total tt̅ production cross section in pp̅ collisions at √s=1.96 TeV at the Tevatron. Using a data sample with an integrated luminosity of 955 pb[superscript -1] recorded by the CDF II detector at Fermilab, we select events based on the tt̅ decay to lepton+jets. Using an artificial neural network technique we discriminate between tt̅ events produced via qq̅ annihilation and gg fusion, and find Gf=σ(gg→tt̅ )/σ(pp̅ →tt̅ )<0.33 at the 68% confidence level. This result is combined with a previous measurement to obtain the most stringent measurement of this quantity by CDF to date, Gf=0.07[subscript -0.07][superscript +0.15]. |
| first_indexed | 2024-09-23T15:20:26Z |
| format | Article |
| id | mit-1721.1/50641 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:20:26Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/506412023-02-26T04:04:38Z Measurement of the fraction of t(t)over-bar production via gluon-gluon fusion in p(p)over-bar collisions at root s=1.96 Tev Xie, Si Knuteson, Bruce O. Henderson, C. Hahn, Kristian Allan Goncharov, Maxim Gomez-Ceballos, Guillelmo Choudalakis, Georgios Makhoul, Khaldoun Bauer, Gerry P Massachusetts Institute of Technology. Laboratory for Nuclear Science Goncharov, Maxim Xie, Si Makhoul, K. Knuteson, Bruce O. Henderson, C. Hahn, Kristian Allan Goncharov, Maxim Gomez-Ceballos, Guillelmo Choudalakis, Georgios Bauer, Gerry P. We present a measurement of the ratio of the tt̅ production cross section via gluon-gluon fusion to the total tt̅ production cross section in pp̅ collisions at √s=1.96 TeV at the Tevatron. Using a data sample with an integrated luminosity of 955 pb[superscript -1] recorded by the CDF II detector at Fermilab, we select events based on the tt̅ decay to lepton+jets. Using an artificial neural network technique we discriminate between tt̅ events produced via qq̅ annihilation and gg fusion, and find Gf=σ(gg→tt̅ )/σ(pp̅ →tt̅ )<0.33 at the 68% confidence level. This result is combined with a previous measurement to obtain the most stringent measurement of this quantity by CDF to date, Gf=0.07[subscript -0.07][superscript +0.15]. 2010-01-08T21:53:29Z 2010-01-08T21:53:29Z 2009-02 2008-07 Article http://purl.org/eprint/type/JournalArticle http://hdl.handle.net/1721.1/50641 CDF Collaboration et al. “Measurement of the fraction of tt-bar production via gluon-gluon fusion in pp-bar collisions at s=1.96 TeV.” Physical Review D 79.3 (2009): 031101. c2010 American Physical Society. en_US http://dx.doi.org/10.1103/PhysRevD.79.031101 Physical Review D Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Xie, Si Knuteson, Bruce O. Henderson, C. Hahn, Kristian Allan Goncharov, Maxim Gomez-Ceballos, Guillelmo Choudalakis, Georgios Makhoul, Khaldoun Bauer, Gerry P Measurement of the fraction of t(t)over-bar production via gluon-gluon fusion in p(p)over-bar collisions at root s=1.96 Tev |
| title | Measurement of the fraction of t(t)over-bar production via gluon-gluon fusion in p(p)over-bar collisions at root s=1.96 Tev |
| title_full | Measurement of the fraction of t(t)over-bar production via gluon-gluon fusion in p(p)over-bar collisions at root s=1.96 Tev |
| title_fullStr | Measurement of the fraction of t(t)over-bar production via gluon-gluon fusion in p(p)over-bar collisions at root s=1.96 Tev |
| title_full_unstemmed | Measurement of the fraction of t(t)over-bar production via gluon-gluon fusion in p(p)over-bar collisions at root s=1.96 Tev |
| title_short | Measurement of the fraction of t(t)over-bar production via gluon-gluon fusion in p(p)over-bar collisions at root s=1.96 Tev |
| title_sort | measurement of the fraction of t t over bar production via gluon gluon fusion in p p over bar collisions at root s 1 96 tev |
| url | http://hdl.handle.net/1721.1/50641 |
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