Measurement of the D[superscript *](2010)[superscript +] Meson Width and the D[superscript *](2010)[superscript +]-D[superscript 0] Mass Difference
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Author(s)
Sciolla, Gabriella
Cowan, Ray F
Dujmic, Denis
Date Issued
September 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Lees, J. P., V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, B. Stugu, et al. “Measurement of the D^{*}(2010)^{+} Meson Width and the D^{*}(2010)^{+}-D^{0} Mass Difference.” Physical Review Letters 111, no. 11 (September 2013). © 2013 American Physical Society
Version
Final published version
Abstract
We measure the mass difference Δm0 between the D[superscript *](2010)[superscript +] and the D[superscript 0] and the natural linewidth Γ of the transition D[superscript *](2010)[superscript +]→D[superscript 0]π[superscript +]. The data were recorded with the BABAR detector at center-of-mass energies at and near the Υ(4S) resonance, and correspond to an integrated luminosity of approximately 477 fb[superscript -1]. The D[superscript 0] is reconstructed in the decay modes D[superscript 0]→K[superscript -]π[superscript +] and D[superscript 0]→K[superscript -]π[superscript +]π[superscript -]π[superscript +]. For the decay mode D[superscript 0]→K[superscript -]π[superscript +] we obtain Γ=(83.4±1.7±1.5) keV and Δm[subscript 0]=(145425.6±0.6±1.8) keV, where the quoted errors are statistical and systematic, respectively. For the D[superscript 0]→K[superscript -]π[superscript +]π[superscript -]π[superscript +] mode we obtain Γ=(83.2±1.5±2.6) keV and Δm[subscript 0]=(145426.6±0.5±2.0) keV. The combined measurements yield Γ=(83.3±1.2±1.4) keV and Δm[subscript 0]=(145425.9±0.4±1.7) keV; the width is a factor of approximately 12 times more precise than the previous value, while the mass difference is a factor of approximately 6 times more precise.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.111.111801
