Study of the decay ... and observation of the W-annihilation decay ... (ProQuest: … denotes formula omitted.)

The decay ... is observed for the first time, using e+ e− collision data corresponding to an integrated luminosity of 6.32 fb−1, collected by the BESIII detector at center-of-mass energies between 4.178 and 4.226 GeV. The absolute branching fraction for this decay is measured to be ... = ( 3.12 ± 0....

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Bibliographic Details
Published in:Physical review. D 2021-10, Vol.104 (7), p.1
Main Author: Ablikim, M
Format: Article
Language:English
Subjects:
Decay
Luminosity
Online Access:Get full text
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Summary:The decay ... is observed for the first time, using e+ e− collision data corresponding to an integrated luminosity of 6.32 fb−1, collected by the BESIII detector at center-of-mass energies between 4.178 and 4.226 GeV. The absolute branching fraction for this decay is measured to be ... = ( 3.12 ± 0.13stat ± 0.09syst) %. The first amplitude analysis of this decay reveals the substructures in ... and determines the relative fractions and the phases among these substructures. The dominant intermediate process is ... with a branching fraction of (1.73 ± 0.14stat ± 0.08syst) %. We also observe the W -annihilation process ... with a branching fraction of (0.21 ± 0.08stat ± 0.05syst) %, which is larger than the branching fractions of other measured pure W -annihilation decays by 1 order of magnitude.(ProQuest: … denotes formulae omitted.)
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.104.L071101