Amplitude analysis of the $\hat{I}{›}_b^0\to p{K}^{-}{\hat{I}}^3$ decay

Abstract

The resonant structure of the radiative decay $\hat{I}{›}_b^0\to p{K}^{-}{\hat{I}}^3$ in the region of proton-kaon invariant-mass up to 2.5 GeV$/c^2$ 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 fit and interference fractions between the different components contributing to this final state. Only $\hat{I}›$ resonances decaying to $p{K}^{-}$ are found to be relevant, where the largest contributions stem from the $\hat{I}›(1520)$, $\hat{I}›(1600)$, $\hat{I}›(1800)$, and $\hat{I}›(1890)$ states.

All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2023-036.html (LHCb public pages)