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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at s√=7 TeV with the ATLAS experiment
AU - Barton, Adam
AU - Borissov, Guennadi
AU - Bouhova-Thacker, Eva
AU - Brodbeck, Timothy
AU - Chilingarov, Alexandre
AU - Davidson, Ruth
AU - de Mora, Lee
AU - Dearnaley, William
AU - Fox, Harald
AU - Henderson, Robert
AU - Hughes, Gareth
AU - Jones, Roger William Lewis
AU - Kartvelishvili, Vakhtang
AU - Long, Robin
AU - Love, Peter
AU - Ratoff, Peter
AU - Smizanska, Maria
AU - Walder, James
AU - The ATLAS collaboration
N1 - This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
PY - 2012/5
Y1 - 2012/5
N2 - This paper describes an analysis of the angular distribution of W→eν and W→μν decays, using data from pp collisions at s√=7 TeV recorded with the ATLAS detector at the LHC in 2010, corresponding to an integrated luminosity of about 35 pb−1. Using the decay lepton transverse momentum and the missing transverse momentum, the W decay angular distribution projected onto the transverse plane is obtained and analysed in terms of helicity fractions f 0, f L and f R over two ranges of W transverse momentum (pWT):3550 GeV . Good agreement is found with theoretical predictions. For pWT>50 GeV , the values of f 0 and f L−f R, averaged over charge and lepton flavour, are measured to be: f 0=0.127±0.030±0.108 and f L−f R=0.252±0.017±0.030, where the first uncertainties are statistical, and the second include all systematic effects.
AB - This paper describes an analysis of the angular distribution of W→eν and W→μν decays, using data from pp collisions at s√=7 TeV recorded with the ATLAS detector at the LHC in 2010, corresponding to an integrated luminosity of about 35 pb−1. Using the decay lepton transverse momentum and the missing transverse momentum, the W decay angular distribution projected onto the transverse plane is obtained and analysed in terms of helicity fractions f 0, f L and f R over two ranges of W transverse momentum (pWT):3550 GeV . Good agreement is found with theoretical predictions. For pWT>50 GeV , the values of f 0 and f L−f R, averaged over charge and lepton flavour, are measured to be: f 0=0.127±0.030±0.108 and f L−f R=0.252±0.017±0.030, where the first uncertainties are statistical, and the second include all systematic effects.
U2 - 10.1140/epjc/s10052-012-2001-6
DO - 10.1140/epjc/s10052-012-2001-6
M3 - Journal article
VL - 72
JO - European Physical Journal C: Particles and Fields
JF - European Physical Journal C: Particles and Fields
SN - 1434-6044
IS - 5
M1 - 2001
ER -