Observation and Study of the Baryonic B-Meson Decays B→D^{(*)}pp̅ (π)(π)

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Observation and Study of the Baryonic B-Meson Decays B→D^{(*)}pp̅ (π)(π)

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Title: Observation and Study of the Baryonic B-Meson Decays B→D^{(*)}pp̅ (π)(π)
Author(s):
Del Amo Sanchez, P.;
Lees, J. P.;
Poireau, V.;
Prencipe, E.;
Tisserand, V.;
Garra Tico, J.;
Grauges, E.;
Izen, Joseph M. (UT Dallas);
Lou, Xinchou (UT Dallas);
BaBar Collaboration
Format: Text
Item Type: Article
Keywords: Physics
Pions--Decay
B mesons--Decay
Abstract: We present results for B-meson decay modes involving a charm meson, protons, and pions using 455×10⁶ BB̄ pairs recorded by the BaBar detector at the SLAC PEP-II asymmetric-energy e⁺e⁻ collider. The branching fractions are measured for the following ten decays: B̅⁰→D⁰pp̄, B̅⁰→D*⁰pp̄, B̅⁰→D⁺pp̄π⁻, B̅⁰→D*⁺pp̄π⁻, B⁻→D⁰pp̄π⁻, B⁻→D*⁰ pp̄π⁻, B̅⁰→D⁰pp̄→D0pp̄π⁻π⁺, B̅⁰→D*⁰pp̄π⁻π⁺, B⁻→D*⁺pp̅π⁻, B⁻→D⁰pp̄π⁻, B⁻→D*⁰pp̄π⁻, B̅⁰→D⁰pp̄π⁻π⁺, B̅⁰→D*⁰pp̄π⁻π⁺, B⁻→D⁺pp̄π⁻π⁻, and B⁻→D*⁺pp̄π⁻π⁻. The four B⁻ and the two five-body B̅⁰ modes are observed for the first time. The four-body modes are enhanced compared to the three- and the five-body modes. In the three-body modes, the M(pp̄) and M(D^{(*)⁰}p) invariant-mass distributions show enhancements near threshold values. In the four-body mode B̅⁰→D⁺pp̄π⁻, the M(pπ⁻) distribution shows a narrow structure of unknown origin near 1.5 GeV/c². The distributions for the five-body modes, in contrast to the others, are similar to the expectations from uniform phase-space predictions.
Publisher: American Physical Society
ISSN: 1550-7998
Persistent Link: http://hdl.handle.net/10735.1/3094
http://dx.doi.org/10.1103/PhysRevD.85.092017
Bibliographic Citation: Del Amo Sanchez, P., J. P. Lees, V. Poireau, E. Prencipe, et al. 2012. "Observation and study of the baryonic B-meson decays B→D(*)pp̅ (π)(π)." Physical Review D - Particles, Fields, Gravitation and Cosmology 85(9), doi:10.1103/PhysRevD.85.092017
Terms of Use: © 2012 American Physical Society

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