Searching the inclusive l gamma EslashT+b-quark signature for radiative top quark decay and non-standard-model processes
Author(s)
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; ... Show more Show less![Thumbnail](/bitstream/handle/1721.1/51864/Aaltonen-2009-Searching%20the%20inclus.pdf.jpg?sequence=4&isAllowed=y)
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Alternative title
Searching the inclusive ℓγE̸T+b-quark signature for radiative top quark decay and non-standard-model processes
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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.
Date issued
2009-07Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review D
Publisher
American Physical Society
Citation
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
Version: Final published version
ISSN
1550-2368
1550-7998