Measurements of W ±Z production cross sections in pp collisions at √ s = 8 TeV with the ATLAS detector and limits on anomalous gauge boson self-couplings

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dc.contributor.author Amelung, Christoph
dc.contributor.author Amundsen, Glenn
dc.contributor.author Barone, Gaetano
dc.contributor.author Bensinger, James R.
dc.contributor.author Bianchini, Louis
dc.contributor.author Blocker, Craig
dc.contributor.author Coffey, Laurel
dc.contributor.author Dhaliwal, Saminder
dc.contributor.author Loew, Kevin
dc.contributor.author Sciolla, Gabriella
dc.contributor.author Venturini, Alessio
dc.contributor.author Zengel, Keith
dc.date.accessioned 2017-11-22T19:21:04Z
dc.date.available 2017-11-22T19:21:04Z
dc.date.issued 2016-05-13
dc.identifier.citation ATLAS Collaboration Physical Review D 93, 092004 (2016)
dc.identifier.issn 2470-0010
dc.identifier.issn 2470-0029
dc.identifier.uri http://hdl.handle.net/10192/34973
dc.description Published version can be found on Physical Review D's site: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.93.092004#fulltext
dc.description.abstract This paper presents measurements of W±Z production in pp collisions at a center-of-mass energy of 8 TeV. The gauge bosons are reconstructed using their leptonic decay modes into electrons and muons. The data were collected in 2012 by the ATLAS experiment at the Large Hadron Collider and correspond to an integrated luminosity of 20.3  fb−1. The measured inclusive cross section in the detector fiducial region is σW±Z→ℓ′νℓℓ=35.1±0.9(stat)±0.8(sys)±0.8(lumi)  fb, for one leptonic decay channel. In comparison, the next-to-leading-order Standard Model expectation is 30.0±2.1  fb. Cross sections for W+Z and W−Z production and their ratio are presented as well as differential cross sections for several kinematic observables. Limits on anomalous triple gauge boson couplings are derived from the transverse mass spectrum of the W±Z system. From the analysis of events with a W and a Z boson associated with two or more forward jets an upper limit at 95% confidence level on the W±Z scattering cross section of 0.63 fb, for each leptonic decay channel, is established, while the Standard Model prediction at next-to-leading order is 0.13±0.01  fb. Limits on anomalous quartic gauge boson couplings are also extracted.
dc.description.sponsorship With the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS, CEA-DSM/IRFU, France; GNSF, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF, I-CORE and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZŠ, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, the Canada Council, CANARIE, CRC, Compute Canada, FQRNT, and the Ontario Innovation Trust, Canada; EPLANET, ERC, FP7, Horizon 2020 and Marie Skłodowska-Curie Actions, European Union; Investissements d’Avenir Labex and Idex, ANR, Région Auvergne and Fondation Partager le Savoir, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF; BSF, GIF and Minerva, Israel; BRF, Norway; the Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA) and in the Tier-2 facilities worldwide.
dc.language English
dc.language.iso eng
dc.publisher American Physical Society
dc.rights Copyright by CERN 2016
dc.subject Particle production
dc.subject Extensions gauge sector
dc.subject W and Z bosons
dc.title Measurements of W ±Z production cross sections in pp collisions at √ s = 8 TeV with the ATLAS detector and limits on anomalous gauge boson self-couplings
dc.type Article
dc.identifier.doi https://doi.org/10.1103/PhysRevD.93.092004


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