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.
Highlights
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 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
Summary
On the rotational invariance and non-invariance of lepton angular distributions in Drell-Yan and quarkonium production Peng, Jen-Chieh; Boer, Daniel; Chang, Wen-Chen; McClellan, Randall Evan; Teryaev, Oleg. Citation for published version (APA): Peng, J-C., Boer, D., Chang, W-C., McClellan, R. On the rotational invariance and non-invariance of lepton angular distributions in Drell-Yan and quarkonium production. More information can be found on the University of Groningen website: https://www.rug.nl/library/open-access/self-archiving-pure/taverneamendment. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. For technical reasons the number of authors shown on this cover page is limited to 10 maximum
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