Title
Searching the inclusive <tex>$\ell\gamma E/_{T}+$</tex> **b**-quark signature for radiative top quark decay and non-standard-model processes
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa ,
Subject
Physics
Source (journal)
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
Volume/pages
80(2009) :1 , p. 011102,1-011102,9
ISSN
0556-2821
ISI
000268618600002
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We compare the inclusive production of events containing a lepton (&#8467;), a photon (γ), significant transverse momentum imbalance (E&#824;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-1 of integrated luminosity taken with the CDF detector. We find 28 &#8467;γbE&#824;T 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, tt&#773; +γ. In the data we observe 16 tt&#773; 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 tt&#773; γ cross section to be 0.15±0.08  pb.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/21a729/69d769eb.pdf
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