Measurement of the top quark branching ratios into channels with leptons and quarks with the ATLAS detector

TL;DR

This paper reports measurements of top quark decay branching ratios into leptons and jets using ATLAS detector data from 7 TeV proton-proton collisions, confirming Standard Model predictions within a few percent uncertainty.

Contribution

First measurement of top quark branching ratios into leptons and jets with ATLAS at 7 TeV, providing experimental validation of Standard Model predictions.

Findings

Branching ratios agree with Standard Model within a few percent

Data collected from 4.6 fb^{-1} of LHC collisions at 7 TeV

Results support current understanding of top quark decays

Abstract

Measurements of the branching ratios of top quark decays into leptons and jets using events with $t \overline{t}$ (top antitop) pairs are reported. Events were recorded with the ATLAS detector at the LHC in pp collisions at a center-of-mass energy of 7 TeV. The collected data sample corresponds to an integrated luminosity of 4.6 ${\mathrm{fb}}^{-1}$. The measured top quark branching ratios agree with the Standard Model predictions within the measurement uncertainties of a few percent.