On the rotational invariance and non-invariance of lepton angular distributions in Drell–Yan and quarkonium production

Jen Chieh Peng; Daniël Boer; Wen Chen Chang; Randall Evan McClellan; Oleg Teryaev

doi:10.1016/j.physletb.2018.11.061

On the rotational invariance and non-invariance of lepton angular distributions in Drell–Yan and quarkonium production

Jen Chieh Peng, Daniël Boer, Wen Chen Chang, Randall Evan McClellan, Oleg Teryaev

Physics

Research output: Contribution to journal › Article

Abstract

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.

Original language	English (US)
Pages (from-to)	356-359
Number of pages	4
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	789
DOIs	https://doi.org/10.1016/j.physletb.2018.11.061
State	Published - Feb 10 2019

Keywords

Drell–Yan process
Lam–Tung relation
Quarkonium production
Rotational invariance

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/j.physletb.2018.11.061

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On the rotational invariance and non-invariance of lepton angular distributions in Drell–Yan and quarkonium production. / Peng, Jen Chieh; Boer, Daniël; Chang, Wen Chen; McClellan, Randall Evan; Teryaev, Oleg.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 789, 10.02.2019, p. 356-359.

Research output: Contribution to journal › Article

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