Search for production of single top quarks via tcg and tug flavor-changing-neutral-current couplings

Authors

V. M. Abazov, Joint Institute for Nuclear Research, DubnaFollow
B. Abbott, University of Oklahoma
M. Abolins, Michigan State UniversityFollow
B. S. Acharya, Tata Institute of Fundamental Research, Mumbai
M. Adams, University of Illinois at ChicagoFollow
T. Adams, Florida State UniversityFollow
E. Aguilo, University of Alberta
S. H. Ahn, Korea UniversityFollow
Abaz Kryemadhi, Messiah UniversityFollow
G. D. AhsanFollow

Document Type

Article

Publication Date

11-6-2007

Abstract

We search for the production of single top quarks via flavor-changing- neutral-current couplings of a gluon to the top quark and a charm (c) or up (u) quark. We analyze 230pb-1 of lepton+jets data from pp̄ collisions at a center of mass energy of 1.96 TeV collected by the D0 detector at the Fermilab Tevatron Collider. We observe no significant deviation from standard model predictions, and hence set upper limits on the anomalous coupling parameters κgc/Λ and κgu/Λ, where κg define the strength of tcg and tug couplings, and Λ defines the scale of new physics. The limits at 95% C.L. are κgc/Λ<0.15TeV-1 and κgu/ Λ<0.037TeV-1. © 2007 The American Physical Society.

Recommended Citation

Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Aguilo, E.; Ahn, S. H.; Kryemadhi, Abaz; and Ahsan, G. D., "Search for production of single top quarks via tcg and tug flavor-changing-neutral-current couplings" (2007). Educator Scholarship & Departmental Newsletters. 136.
https://mosaic.messiah.edu/mps_ed/136