Measurement of W± and Z-boson production cross sections in pp collisions at with the ATLAS detector
© 2016 The Author(s) Measurements of the W ± →ℓ ± ν and Z→ℓ + ℓ - production cross sections (where ℓ ± =e ± ,μ ± ) in proton–proton collisions at s=13 TeV are presented using data recorded by the ATLAS experiment at the Large Hadron Collider, corresponding to a total integrated luminosity of 81 pb -1 . The total inclusive W ± -boson production cross sections times the single-lepton-flavour branching ratios are σ W + tot =11.83±0.02 (stat)±0.32 (sys)±0.25 (lumi) nb and σ W - tot =8.79±0.02 (stat)±0.24 (sys)±0.18 (lumi) nb for W + and W - , respectively. The total inclusive Z-boson production cross section times leptonic branching ratio, within the invariant mass window 66 < m ℓℓ < 116 GeV, is σ Z tot =1.981±0.007 (stat)±0.038 (sys)±0.042 (lumi) nb. The W + , W - , and Z-boson production cross sections and cross-section ratios within a fiducial region defined by the detector acceptance are also measured. The cross-section ratios benefit from significant cancellation of experimental uncertainties, resulting in σ W + fid /σ W - fid =1.295±0.003 (stat)±0.010 (sys) and σ W ± fid /σ Z fid =10.31±0.04 (stat)±0.20 (sys). Theoretical predictions, based on calculations accurate to next-to-next-to-leading order for quantum chromodynamics and to next-to-leading order for electroweak processes and which employ different parton distribution function sets, are compared to these measurements.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- The ATLAS Collaboration
- Grant/Contract Number:
- AC02-76SF00515; AC02-05CH11231
- OSTI ID:
- 1257865
- Alternate ID(s):
- OSTI ID: 1261157; OSTI ID: 1379560
- Journal Information:
- Physics Letters B, Journal Name: Physics Letters B Vol. 759 Journal Issue: C; ISSN 0370-2693
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- Netherlands
- Language:
- English
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