Search for Top-Quark Production via Flavor-Changing Neutral Currents in <em>W</em>+1 Jet Events at CDF

CDF Collaboration

doi:10.1103/PhysRevLett.102.151801

Scientific article

English

Search for Top-Quark Production via Flavor-Changing Neutral Currents in W+1 Jet Events at CDF

Contributors

CDF Collaboration

Collaborators

Clark, Allan Geoffrey; Garcia Navarro, Jose Enrique; Vallecorsa, Sofia; Wu, Xin

Published in

Physical review letters, vol. 102, no. 15, 151801

Publication date

2009

Abstract

We report on a search for the non-standard-model process u(c)+g→t using pp collision data collected by the Collider Detector at Fermilab II detector corresponding to 2.2 fb−1. The candidate events are classified as signal-like or backgroundlike by an artificial neural network. The observed discriminant distribution yields no evidence for flavor-changing neutral current top-quark production, resulting in an upper limit on the production cross section σ(u(c)+g→t)<1.8 pb at the 95% C.L. Using theoretical predictions we convert the cross section limit to upper limits on flavor-changing neutral current branching ratios: B(t→u+g)<3.9×10−4 and B(t→c+g)<5.7×10−3.

UNIGE affiliation entities

Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Citation (ISO format)

CDF Collaboration. Search for Top-Quark Production via Flavor-Changing Neutral Currents in W+1 Jet Events at CDF. In: Physical review letters, 2009, vol. 102, n° 15, p. 151801. doi: 10.1103/PhysRevLett.102.151801

Article (Published version)

Identifiers

PID : unige:38536
DOI : 10.1103/PhysRevLett.102.151801

Additional URL for this publication

http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.102.151801

Journal ISSN

0031-9007

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Creation

08/07/2014 12:02:00

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08/07/2014 12:02:00

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13/10/2025 22:33:33

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10/11/2026 16:59:23