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Angular distribution of Λ b 0 → p K − ℓ + ℓ − decays comprising Λ resonances with spin ≤ 5 / 2
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Beck, A., Blake, Thomas and Kreps, Michal (2023) Angular distribution of Λ b 0 → p K − ℓ + ℓ − decays comprising Λ resonances with spin ≤ 5 / 2. Journal of High Energy Physics, 2023 (2). 189. doi:10.1007/jhep02(2023)189 ISSN 1029-8479.
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Official URL: https://doi.org/10.1007/jhep02(2023)189
Abstract
This paper describes the angular distribution of Λb0→Λ→pK−ℓ+ℓ− decays. A full expression is given for the case of multiple interfering spin-states with spin ≤52. This distribution is relevant for future measurements of Λb0→pK−ℓ+ℓ− decays, where different states cannot easily be separated based on their mass alone. New observables arise when considering spin-52 states as well as interference between states. An exploration of their behaviour for a variety of beyond the Standard Model scenarios shows that some of these observables exhibit interesting sensitivity to the Wilson coefficients involved in b → sℓ+ℓ− transitions. Others are insensitive to the Wilson coefficients and can be used to verify the description of Λb0→Λ form-factors. A basis of weighting functions that can be used to determine all of the angular observables described in this paper in a moment analysis of the experimental data is also provided.
Item Type: | Journal Article | ||||||
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Subjects: | Q Science > QC Physics | ||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
SWORD Depositor: | Library Publications Router | ||||||
Library of Congress Subject Headings (LCSH): | Particles (Nuclear physics), Quarks -- Decay, B mesons -- Decay, Leptons (Nuclear physics) -- Decay | ||||||
Journal or Publication Title: | Journal of High Energy Physics | ||||||
Publisher: | Springer Berlin Heidelberg | ||||||
ISSN: | 1029-8479 | ||||||
Official Date: | 20 February 2023 | ||||||
Dates: |
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Volume: | 2023 | ||||||
Number: | 2 | ||||||
Article Number: | 189 | ||||||
DOI: | 10.1007/jhep02(2023)189 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Reuse Statement (publisher, data, author rights): | |||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Date of first compliant deposit: | 26 April 2023 | ||||||
Date of first compliant Open Access: | 26 April 2023 | ||||||
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