Abstract
The decay is studied in proton-proton collisions at a center-of-mass energy of using data corresponding to an integrated luminosity of collected by the LHCb experiment. In the system, the state observed at the BABAR and Belle experiments is resolved into two narrower states, and , whose masses and widths are measured to be , , , , where the first uncertainties are statistical and the second systematic. The results are consistent with a previous LHCb measurement using a prompt sample. Evidence of a new state is found with a local significance of , whose mass and width are measured to be and , respectively. In addition, evidence of a new decay mode is found with a significance of . The relative branching fraction of with respect to the decay is measured to be , where the first uncertainty is statistical, the second systematic and the third originates from the branching fractions of charm hadron decays.
- Received 3 November 2022
- Accepted 5 January 2023
DOI:https://doi.org/10.1103/PhysRevD.108.012020
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
© 2023 CERN, for the LHCb Collaboration