Measurement of $W^{\pm }$-boson and Z-boson production cross-sections in pp collisions at $\sqrt{s}=2.76$ TeV with the ATLAS detector - INSPIRE

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Measurement of $W^{\pm }$ -boson and Z-boson production cross-sections in pp collisions at $\sqrt{s}=2.76$ TeV with the ATLAS detector

ATLAS

Collaboration

Jul 8, 2019

43 pages

Published in:

Eur.Phys.J.C 79 (2019) 11, 901

Published: Nov 8, 2019

e-Print:

1907.03567 [hep-ex]

DOI:

10.1140/epjc/s10052-019-7399-7

Report number:

CERN-EP-2019-095

Experiments:

CERN-LHC-ATLAS

View in:

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Abstract: (Springer)

The production cross-sections for

W^{\pm }

and Z bosons are measured using ATLAS data corresponding to an integrated luminosity of 4.0 pb

^{-1}

collected at a centre-of-mass energy

\sqrt{s}=2.76

TeV. The decay channels

W \rightarrow \ell \nu

and

Z \rightarrow \ell \ell

are used, where

\ell

can be an electron or a muon. The cross-sections are presented for a fiducial region defined by the detector acceptance and are also extrapolated to the full phase space for the total inclusive production cross-section. The combined (average) total inclusive cross-sections for the electron and muon channels are:

\begin{aligned} \sigma ^{\text {tot}}_{W^{+}\rightarrow \ell \nu }= & {} 2312 \pm 26\ (\text {stat.})\\&\pm 27\ (\text {syst.}) \pm 72\ (\text {lumi.}) \pm 30\ (\text {extr.})~\text {pb} , \\ \sigma ^{\text {tot}}_{W^{-}\rightarrow \ell \nu }= & {} 1399 \pm 21\ (\text {stat.})\ \pm 17\ (\text {syst.}) \\&\pm 43\ (\text {lumi.}) \pm 21\ (\text {extr.})~\text {pb} , \\ \sigma ^{\text {tot}}_{Z \rightarrow \ell \ell }= & {} 323.4 \pm 9.8\ (\text {stat.}) \pm 5.0\ (\text {syst.})\\&\pm 10.0\ (\text {lumi.}) \pm 5.5 (\text {extr.}) ~\text {pb} . \end{aligned}

Measured ratios and asymmetries constructed using these cross-sections are also presented. These observables benefit from full or partial cancellation of many systematic uncertainties that are correlated between the different measurements.

Note:

43 pages in total, Author list starts at page 27, 7 figures, 9 tables, to be submitted to EPJ C. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2018-06/

p p: scattering
p p: colliding beams
W: hadroproduction
Z0: hadroproduction
W: leptonic decay
Z0: leptonic decay
electron
ATLAS
CERN LHC Coll
muon

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