AI Article Synopsis
- The study presents measurements of B meson decay into D
- states using data from the BABAR detector at the PEP-II storage rings.
- Researchers selected events by fully reconstructing one B meson in a specific decay mode and analyzed mass differences to determine the yields of various D
- states.
- The findings confirm the existence of B-->D
- l(-1)nu(l) decays for four predicted D states, with a significance surpassing 5 standard deviations, indicating strong evidence for these decay modes.
Article Abstract
We report a measurement of the branching fractions of B-->D**(l) nu(l), decays based on 417 fb(-1) of data collected at the Y(4S) resonance with the BABAR detector at the PEP-II e+e- storage rings. Events are selected by full reconstructing one of the B mesons in a hadronic decay mode. A fit to the invariant mass differences m(D(*) pi)- m(D(*)) is performed to extract the signal yields of the different D** states. We observe the B-->D**l(-1)nu(l) decay modes corresponding to the four D states predicted by heavy quark symmetry with a significance greater than 5 standard deviations including systematic uncertainties.
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| http://dx.doi.org/10.1103/PhysRevLett.101.261802 | DOI Listing |
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