English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

The production of a top quark in association with a $Z$ boson isinvestigated. The proton--proton collision data collected by the ATLASexperiment at the LHC in 2015 and 2016 at a centre-of-mass energy of $\sqrt{s}= 13 \mathrm{TeV}$ are used, corresponding to an integrated luminosity of $36.1\mathrm{fb}^{-1}$. Events containing three identified leptons (electrons and/ormuons) and two jets, one of which is identified as a $b$-quark jet areselected. The major backgrounds are diboson, $t\bar{t}$ and $Z\mathrm{+jets}$production. A neural network is used to improve the background rejection andextract the signal. The resulting significance is $4.2\sigma$ in the data andthe expected significance is $5.4\sigma$. The measured cross-section for $tZq$production is $600 \pm 170 \mathrm{(stat.)} \pm 140 \mathrm{(syst.)}\mathrm{fb}$.

physics letters b

Measurement of the production cross-section of a single top quark in  association with a $Z$ boson in proton--proton collisions at 13 TeV with the  ATLAS detector