Measurement of the cross-section for producing a W boson in association with a single top quark in pp collisions at √s=13 TeV with ATLAS [Elektronisk resurs]
Aaboud, M.(författare)
Bergeås, Elin Kuutmann(författare)
Bokan, Petar(författare)
Brenner, Richard(författare)
Ekelöf, Tord(författare)
Ellert, Mattias(författare)
Ferrari, Arnaud(författare)
Gradin, P.O. Joakim(författare)
Maddocks, H.J.(författare)
Öhman, Henrik(författare)
Rangel-Smith, Camilla(författare)
Sales De Bruin, Pedro H.(författare)
Zwalinski, L.(författare)
Uppsala universitet Teknisk-naturvetenskapliga vetenskapsområdet(utgivare)
Uppsala universitet Teknisk-naturvetenskapliga vetenskapsområdet(utgivare)
2018
Engelska.
Ingår i: Journal of High Energy Physics (JHEP). - 1126-6708. ; 1
The inclusive cross-section for the associated production of a W boson and top quark is measured using data from proton-proton collisions at √s=13 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 W t signal is then separated from the t ($) over bar 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 σ W t = 94 ± 10(stat.) − 22 + 28 (syst.) ± 2(lumi.) pb. The measured value is in good agreement with the SM prediction of σ theory = 71 . 7±1 . 8 (scale)± 3 . 4 (PDF) pb [1].
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