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Photo of Rikkert Frederix

Rikkert Frederix

Senior lecturer

Photo of Rikkert Frederix

T -odd asymmetry in W+ jet events at the LHC

Author

  • Rikkert Frederix
  • Kaoru Hagiwara
  • Toshifumi Yamada
  • Hiroshi Yokoya

Summary, in English

W bosons produced at high transverse momentum in hadron collisions can have polarization along the direction perpendicular to the production plane, which is odd under naïve T reversal where both the three-momenta and angular momenta are reversed. Perturbative QCD predicts nonzero polarization at the one-loop level, which can be measured as parity-odd components in the angular distribution of charged leptons from the decay of W bosons. We perform a detector-level simulation with the generator MadGraph5-aMC@NLO, and demonstrate that the asymmetry can be observed at the 8 TeV LHC with 20fb-1 of data. If confirmed, it will be the first experimental measurement of the sign of the imaginary part of one-loop QCD amplitudes.

Publishing year

2014-10-06

Language

English

Publication/Series

Physical Review Letters

Volume

113

Issue

15

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0031-9007