TY - JOUR
T1 - On the rotational invariance and non-invariance of lepton angular distributions in Drell–Yan and quarkonium production
AU - Peng, Jen Chieh
AU - Boer, Daniël
AU - Chang, Wen Chen
AU - McClellan, Randall Evan
AU - Teryaev, Oleg
N1 - Funding Information:
This work was supported in part by the U.S. National Science Foundation and the Ministry of Science and Technology of Taiwan . It was also supported in part by the U.S. Department of Energy , Office of Science, Office of Nuclear Physics under contract DE-AC05-060R23177 .
Publisher Copyright:
© 2018 The Authors
PY - 2019/2/10
Y1 - 2019/2/10
N2 - Several rotational invariant quantities for the lepton angular distributions in Drell–Yan and quarkonium production were derived several years ago, allowing the comparison between different experiments adopting different reference frames. Using an intuitive picture for describing the lepton angular distribution in these processes, we show how the rotational invariance of these quantities can be obtained. This approach can also be used to determine the rotational invariance or non-invariance of various quantities specifying the amount of violation for the Lam–Tung relation. While the violation of the Lam–Tung relation is often expressed by frame-dependent quantities, we note that alternative frame-independent quantities are preferred.
AB - Several rotational invariant quantities for the lepton angular distributions in Drell–Yan and quarkonium production were derived several years ago, allowing the comparison between different experiments adopting different reference frames. Using an intuitive picture for describing the lepton angular distribution in these processes, we show how the rotational invariance of these quantities can be obtained. This approach can also be used to determine the rotational invariance or non-invariance of various quantities specifying the amount of violation for the Lam–Tung relation. While the violation of the Lam–Tung relation is often expressed by frame-dependent quantities, we note that alternative frame-independent quantities are preferred.
KW - Drell–Yan process
KW - Lam–Tung relation
KW - Quarkonium production
KW - Rotational invariance
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U2 - 10.1016/j.physletb.2018.11.061
DO - 10.1016/j.physletb.2018.11.061
M3 - Article
AN - SCOPUS:85059196916
VL - 789
SP - 356
EP - 359
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
ER -