TY - JOUR
T1 - QCD effects in lepton angular distributions of Drell-Yan/Z production and jet discrimination
AU - Chang, Wen Chen
AU - McClellan, Randall Evan
AU - Peng, Jen Chieh
AU - Teryaev, Oleg
N1 - Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
PY - 2021/4/15
Y1 - 2021/4/15
N2 - We present a comparison of data of lepton angular distributions of Drell-Yan/Z production with the fixed-order pQCD calculations by which the baseline of pQCD effects is illustrated. As for the Z production, we predict that A0 and A2 for Z plus single gluon-jet events are very different from that of Z plus single quark-jet events, allowing a new experimental tool for checking various algorithms which attempt to discriminate quark jets from gluon jets. Using an intuitive geometric approach, we show that the violation of the Lam-Tung relation, appearing at large transverse-momentum region, is attributed to the presence of a non-coplanarity effect. This interpretation is consistent with the appearance of violation beyond LO-QCD effect.
AB - We present a comparison of data of lepton angular distributions of Drell-Yan/Z production with the fixed-order pQCD calculations by which the baseline of pQCD effects is illustrated. As for the Z production, we predict that A0 and A2 for Z plus single gluon-jet events are very different from that of Z plus single quark-jet events, allowing a new experimental tool for checking various algorithms which attempt to discriminate quark jets from gluon jets. Using an intuitive geometric approach, we show that the violation of the Lam-Tung relation, appearing at large transverse-momentum region, is attributed to the presence of a non-coplanarity effect. This interpretation is consistent with the appearance of violation beyond LO-QCD effect.
UR - http://www.scopus.com/inward/record.url?scp=85105458951&partnerID=8YFLogxK
M3 - 會議論文
AN - SCOPUS:85105458951
SN - 1824-8039
VL - 390
JO - Proceedings of Science
JF - Proceedings of Science
M1 - 465
T2 - 40th International Conference on High Energy Physics, ICHEP 2020
Y2 - 28 July 2020 through 6 August 2020
ER -