Searching the inclusive l gamma EslashT+b-quark signature for radiative top quark decay and non-standard-model processes
We compare the inclusive production of events containing a lepton (ℓ), a photon (γ), significant transverse momentum imbalance (E̸[subscript T]), and a jet identified as containing a b-quark, to SM predictions. The search uses data produced in proton-antiproton collisions at √s=1.96 TeV correspondi...
| Main Authors: | , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/51864 https://orcid.org/0000-0002-6047-4211 |
| _version_ | 1826203364970463232 |
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| author | Xie, Si Knuteson, Bruce O. Henderson, C. Hahn, Kristian Allan Gomez-Ceballos, Guillelmo Choudalakis, Georgios Paus, Christoph M. E. Makhoul, Khaldoun Goncharov, Maxim Bauer, Gerry P |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Xie, Si Knuteson, Bruce O. Henderson, C. Hahn, Kristian Allan Gomez-Ceballos, Guillelmo Choudalakis, Georgios Paus, Christoph M. E. Makhoul, Khaldoun Goncharov, Maxim Bauer, Gerry P |
| author_sort | Xie, Si |
| collection | MIT |
| description | We compare the inclusive production of events containing a lepton (ℓ), a photon (γ), significant transverse momentum imbalance (E̸[subscript T]), and a jet identified as containing a b-quark, to SM predictions. The search uses data produced in proton-antiproton collisions at √s=1.96 TeV corresponding to 1.9 fb[superscript -1] of integrated luminosity taken with the CDF detector. We find 28 ℓγb(E̸[subscript T]) events versus an expectation of 31.0[subscript -3.5][superscript +4.1] events. If we further require events to contain at least three jets and large total transverse energy, the largest SM source is radiative top-quark pair production, tt̅ +γ. In the data we observe 16 tt̅ γ candidate events versus an expectation from SM sources of 11.2-2.1+2.3. Assuming the difference between the observed number and the predicted non-top-quark total of 6.8[subscript -2.0][superscript +2.2] is due to SM top-quark production, we estimate the tt̅ γ cross section to be 0.15±0.08 pb. |
| first_indexed | 2024-09-23T12:35:27Z |
| format | Article |
| id | mit-1721.1/51864 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T12:35:27Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/518642023-02-26T06:01:09Z Searching the inclusive l gamma EslashT+b-quark signature for radiative top quark decay and non-standard-model processes Searching the inclusive ℓγE̸T+b-quark signature for radiative top quark decay and non-standard-model processes Xie, Si Knuteson, Bruce O. Henderson, C. Hahn, Kristian Allan Gomez-Ceballos, Guillelmo Choudalakis, Georgios Paus, Christoph M. E. Makhoul, Khaldoun Goncharov, Maxim Bauer, Gerry P Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Paus, Christoph M. E. Xie, Si Makhoul, K. Knuteson, Bruce O. Henderson, C. Hahn, Kristian Allan Goncharov, M. Gomez-Ceballos, Guillelmo Choudalakis, Georgios Bauer, Gerry P. Paus, Christoph M. E. We compare the inclusive production of events containing a lepton (ℓ), a photon (γ), significant transverse momentum imbalance (E̸[subscript T]), and a jet identified as containing a b-quark, to SM predictions. The search uses data produced in proton-antiproton collisions at √s=1.96 TeV corresponding to 1.9 fb[superscript -1] of integrated luminosity taken with the CDF detector. We find 28 ℓγb(E̸[subscript T]) events versus an expectation of 31.0[subscript -3.5][superscript +4.1] events. If we further require events to contain at least three jets and large total transverse energy, the largest SM source is radiative top-quark pair production, tt̅ +γ. In the data we observe 16 tt̅ γ candidate events versus an expectation from SM sources of 11.2-2.1+2.3. Assuming the difference between the observed number and the predicted non-top-quark total of 6.8[subscript -2.0][superscript +2.2] is due to SM top-quark production, we estimate the tt̅ γ cross section to be 0.15±0.08 pb. Academy of Finland Slovak R&D Agency Programa Consolider-Ingenio 2010, Spain Ministerio de Ciencia e Innovación, Spain Russian Foundation for Basic Research Institut National de Physique Nucleaire et Physique des Particules/CNRS Royal Society, United Kingdom Science and Technology Facilities Council, United Kingdom Korean Research Foundation Korean Science and Engineering Foundation Bundesministerium für Bildung und Forschung, Germany Alfred P. Sloan Foundation Swiss National Science Foundation National Science Council of the Republic of China Natural Sciences and Engineering Research Council of Canada Ministry of Education, Culture, Sports, Science and Technology of Japan Italian Istituto Nazionale di Fisica Nucleare National Science Foundation United States Department of Energy 2010-03-01T20:24:45Z 2010-03-01T20:24:45Z 2009-07 2009-06 Article http://purl.org/eprint/type/JournalArticle 1550-2368 1550-7998 http://hdl.handle.net/1721.1/51864 CDF Collaboration et al. “Searching the inclusive l gamma EslashT+b-quark signature for radiative top quark decay and non-standard-model processes.” Physical Review D 80.1 (2009): 011102. © 2009 The American Physical Society https://orcid.org/0000-0002-6047-4211 en_US http://dx.doi.org/10.1103/PhysRevD.80.011102 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 Gomez-Ceballos, Guillelmo Choudalakis, Georgios Paus, Christoph M. E. Makhoul, Khaldoun Goncharov, Maxim Bauer, Gerry P Searching the inclusive l gamma EslashT+b-quark signature for radiative top quark decay and non-standard-model processes |
| title | Searching the inclusive l gamma EslashT+b-quark signature for radiative top quark decay and non-standard-model processes |
| title_full | Searching the inclusive l gamma EslashT+b-quark signature for radiative top quark decay and non-standard-model processes |
| title_fullStr | Searching the inclusive l gamma EslashT+b-quark signature for radiative top quark decay and non-standard-model processes |
| title_full_unstemmed | Searching the inclusive l gamma EslashT+b-quark signature for radiative top quark decay and non-standard-model processes |
| title_short | Searching the inclusive l gamma EslashT+b-quark signature for radiative top quark decay and non-standard-model processes |
| title_sort | searching the inclusive l gamma eslasht b quark signature for radiative top quark decay and non standard model processes |
| url | http://hdl.handle.net/1721.1/51864 https://orcid.org/0000-0002-6047-4211 |
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