T -odd asymmetry in W+ jet events at the LHC
(2014) In Physical Review Letters 113(15).- Abstract
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.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/a563b5c4-fd02-4cc6-8d0f-0832cab400cb
- author
- Frederix, Rikkert LU ; Hagiwara, Kaoru ; Yamada, Toshifumi and Yokoya, Hiroshi
- publishing date
- 2014-10-06
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 113
- issue
- 15
- article number
- 152001
- publisher
- American Physical Society
- external identifiers
-
- scopus:84907855050
- ISSN
- 0031-9007
- DOI
- 10.1103/PhysRevLett.113.152001
- language
- English
- LU publication?
- no
- id
- a563b5c4-fd02-4cc6-8d0f-0832cab400cb
- date added to LUP
- 2019-05-28 15:38:46
- date last changed
- 2022-01-31 21:04:37
@article{a563b5c4-fd02-4cc6-8d0f-0832cab400cb, abstract = {{<p>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.</p>}}, author = {{Frederix, Rikkert and Hagiwara, Kaoru and Yamada, Toshifumi and Yokoya, Hiroshi}}, issn = {{0031-9007}}, language = {{eng}}, month = {{10}}, number = {{15}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{T -odd asymmetry in W+ jet events at the LHC}}, url = {{http://dx.doi.org/10.1103/PhysRevLett.113.152001}}, doi = {{10.1103/PhysRevLett.113.152001}}, volume = {{113}}, year = {{2014}}, }