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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/23102
Title: 
Search for production of single top quarks via tcg and tug flavor-changing-neutral-current couplings
Author(s): 
Institution: 
  • Radboud Univ Nijmegen
  • Univ Buenos Aires
  • Centro Brasileiro de Pesquisas Físicas (CBPF)
  • Universidade do Estado do Rio de Janeiro (UERJ)
  • Universidade Estadual Paulista (UNESP)
  • Univ Alberta
  • Simon Fraser Univ
  • York Univ
  • McGill Univ
  • Univ Sci & Technol China
  • Universidad de los Andes
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  • Univ Coll Dublin
  • Korea University
  • Sungkyunkwan Univ
  • CINVESTAV
  • FOM Inst NIKHEF
  • Univ Amsterdam
  • Joint Inst Nucl Res
  • Institute for Theoretical and Experimental Physics (ITEP)
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  • Inst High Energy Phys
  • Petersburg Nucl Phys Inst
  • Lund Univ
  • Royal Inst Technol
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  • Uppsala Univ
  • Univ Zurich
  • University of Lancaster
  • Univ London Imperial Coll Sci Technol & Med
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  • University of Arizona
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  • Calif State Univ Fresno
  • University of California, Riverside (UCR)
  • Florida State University
  • Fermilab Natl Accelerator Lab
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ISSN: 
0031-9007
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 230 pb(-1) of lepton+jets data from p (p) over tilde 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 kappa(c)(g)/Lambda and kappa(u)(g)/Lambda, where kappa(g) define the strength of tcg and tug couplings, and Lambda defines the scale of new physics. The limits at 95% C.L. are kappa(c)(g)/Lambda < 0.15 TeV-1 and kappa(u)(g)/Lambda < 0.037 TeV-1.
Issue Date: 
9-Nov-2007
Citation: 
Physical Review Letters. College Pk: Amer Physical Soc, v. 99, n. 19, 8 p., 2007.
Time Duration: 
8
Publisher: 
Amer Physical Soc
Source: 
http://dx.doi.org/10.1103/PhysRevLett.99.191802
URI: 
http://hdl.handle.net/11449/23102
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/23102
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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