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Amplitude analysis of the Λ 0 b → pK−γ decay

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The resonant structure of the radiative decay Λ 0 b → pK−γ in the region of proton-kaon invariant-mass up to 2.5 GeV/c2 is studied using proton-proton collision data recorded at centre-of-mass energies of 7, 8, and 13 TeV collected with the LHCb detector, corresponding to a total integrated luminosity of 9 fb−1 . Results are given in terms of ft and interference fractions between the diferent components contributing to this fnal state. Only Λ resonances decaying to pK− are found to be relevant, where the largest contributions stem from the Λ(1520), Λ(1600), Λ(1800), and Λ(1890) states.

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Journal of High Energy Physics, 2024, vol. 2024, num.98

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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Amplitude analysis of the Λ 0 b → pK−γ decay