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Title
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Searching the inclusive **b**-quark signature for radiative top quark decay and non-standard-model processes
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Author
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Institution/Organisation
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CDF Collaboration
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Abstract
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| We compare the inclusive production of events containing a lepton (ℓ), a photon (γ), significant transverse momentum imbalance (E̸T), 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-1 of integrated luminosity taken with the CDF detector. We find 28 ℓγbE̸T events versus an expectation of 31.0-3.5+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 6.8-2.0+2.2 is due to SM top-quark production, we estimate the tt̅ γ cross section to be 0.15±0.08 pb. |
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Language
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English
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Source (journal)
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Physical review : D : particles, fields, gravitation, and cosmology / American Physical Society. - Ridge, N.Y., 2004 - 2015
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
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Publication
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Ridge, N.Y.
:
American Physical Society
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2009
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ISSN
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1550-7998
[print]
1550-2368
[online]
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DOI
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10.1103/PHYSREVD.80.011102
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Volume/pages
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80
:1
(2009)
, p. 011102,1-011102,9
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ISI
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000268618600002
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Full text (Publisher's DOI)
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Full text (open access)
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