TL;DR
This paper reports on multiple studies of charmed mesons and baryons at BABAR, including searches for rare decays, measurements of branching fractions, and production mechanisms, advancing understanding of charm physics.
Contribution
It presents new upper limits, branching fraction measurements, and production insights for various charm mesons and baryons, which were not previously available.
Findings
New upper limits on D0 --> l+ l- decays.
Measured ratios of branching fractions for Ds*(2112)+ decays.
Confirmed Xic0 production in B decays.
Abstract
The results of several studies of charmed mesons and baryons at BABAR are presented. First, searches for the rare decays D0 --> l+ l- are presented and new upper limits on these processes are established. Second, a measurement of the branching fraction of the isospin-violating hadronic decay Ds*(2112)+ --> Ds+ pi0 relative to the radiative decay Ds*(2112)+ --> Ds+ gamma is made. Third, the decays of DsJ*(2317)+ and DsJ(2460)+ mesons are studied and ratios of branching fractions are measured. Fourth, Cabibbo-suppressed decays of the Lambdac+ are examined and their branching fractions measured relative to Cabibbo-allowed modes. Fifth, the Xic0 is studied through its decays to Xi- pi+ and Omega- K+; in addition to measuring the ratio of branching fractions for Xic0 produced from the cc continuum, the uncorrected momentum spectrum is measured, providing clear confirmation of Xic0 production…
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