# Measurement of the cross-section for producing a $W$ boson in association with a single top quark in $pp$ collisions at $\sqrt{s}={13}\text{TeV}$ with ATLAS

Abstract : The inclusive cross-section for the associated production of a $W$ boson and top quark is measured using data from proton-proton collisions at $\sqrt{s}={13}\text{TeV}$. The dataset corresponds to an integrated luminosity of 3.2 fb$^{-1}$, and was collected in 2015 by the ATLAS detector at the Large Hadron Collider at CERN. Events are selected requiring two opposite sign isolated leptons and at least one jet; they are separated into signal and control regions based on their jet multiplicity and the number of jets that are identified as containing $b$ hadrons. The $Wt$ signal is then separated from the $t\bar{t}$ background using boosted decision tree discriminants in two regions. The cross-section is extracted by fitting templates to the data distributions, and is measured to be $94 \pm 10$ (stat.)$^{+28}_{-22}$ (syst.) $\pm 2$ (lumi.) pb. The measurement is in agreement with the Standard Model prediction.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-01431232
Contributor : Claudine Bombar <>
Submitted on : Tuesday, January 10, 2017 - 4:06:09 PM
Last modification on : Friday, August 9, 2019 - 4:32:02 PM

### Citation

M. Aaboud, N. Berger, A.M. Burger, M. Delmastro, L. Di Ciaccio, et al.. Measurement of the cross-section for producing a $W$ boson in association with a single top quark in $pp$ collisions at $\sqrt{s}={13}\text{TeV}$ with ATLAS. Journal of High Energy Physics, Springer Verlag (Germany), 2018, 01, pp.63. ⟨10.1007/JHEP01(2018)063⟩. ⟨in2p3-01431232⟩

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