Evidence for s-channel single top quark production in pp collisions at √s = 1.96 TeV

Nenhuma Miniatura disponível

Data

2013-10-08

Orientador

Coorientador

Pós-graduação

Curso de graduação

Título da Revista

ISSN da Revista

Título de Volume

Editor

Tipo

Artigo

Direito de acesso

Resumo

We present measurements of the cross sections for the two main production modes of single top quarks in pp- collisions at s=1.96 TeV in the Run II data collected with the D0 detector at the Fermilab Tevatron Collider, corresponding to an integrated luminosity of 9.7 fb-1. The s-channel cross section is measured to be σ(pp-→tb+X)=1.10-0.31+0.33 pb with no assumptions on the value of the t-channel cross section. Similarly, the t-channel cross section is measured to be σ(pp-→tqb+X)=3.07-0.49+0.54 pb. We also measure the s+t combined cross section as σ(pp-→tb+X,tqb+X)=4.11-0.55+0.60 pb and set a lower limit on the CKM matrix element |Vtb|>0.92 at 95% C.L., assuming mt=172.5 GeV. The probability to measure a cross section for the s channel at the observed value or higher in the absence of signal is 1.0×10-4, corresponding to a significance of 3.7 standard deviations. © 2013 Elsevier B.V.

Descrição

Palavras-chave

Idioma

Inglês

Como citar

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v. 726, n. 4-5, p. 656-664, 2013.

Itens relacionados

Financiadores

Coleções