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Physical Review D

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Using single top rapidity to measure $V_{t d}$ , $V_{t s}$ , $V_{t b}$ at hadron colliders

J. A. Aguilar-Saavedra

Departamento de Física Teórica y del Cosmos and CAFPE, Universidad de Granada, E-18071 Granada, Spain

Departamento de Fisica, Universidade do Minho, P-4710-057 Braga, Portugal

Phys. Rev. D 83, 073003 – Published 6 April, 2011

DOI: https://doi.org/10.1103/PhysRevD.83.073003

Abstract

Single top production processes are usually regarded as the ones in which $V_{t b}$ can be directly measured at hadron colliders. We show that the analysis of the single top rapidity distribution in $t$ -channel and $t W$ production can also set direct limits on $V_{t d}$ . At LHC with $10 {fb}^{- 1}$ at 14 TeV, the combined limits on $V_{t d}$ may be reduced by almost a factor of 2 when the top rapidity distribution is used. This also implies that the limits on $V_{t b}$ can also be reduced by $15 %$ , since both parameters, as well as $V_{t s}$ , must be simultaneously obtained from a global fit to data. At Tevatron, the exploitation of this distribution would require very high statistics.

Article Text

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