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Measurement of the D*(2010)+ meson width and the D*(2010)+ - D0 mass difference.

Authors
  • Lees, J P
  • Poireau, V
  • Tisserand, V
  • Grauges, E
  • Palano, A
  • Eigen, G
  • Stugu, B
  • Brown, D N
  • Kerth, L T
  • Kolomensky, Yu G
  • Lee, M J
  • Lynch, G
  • Koch, H
  • Schroeder, T
  • Hearty, C
  • Mattison, T S
  • McKenna, J A
  • So, R Y
  • Khan, A
  • Blinov, V E
  • And 324 more
Type
Published Article
Journal
Physical Review Letters
Publisher
American Physical Society
Publication Date
Sep 13, 2013
Volume
111
Issue
11
Pages
111801–111801
Identifiers
PMID: 24074072
Source
Medline
License
Unknown

Abstract

We measure the mass difference Δm0 between the D*(2010)+ and the D0 and the natural linewidth Γ of the transition D*(2010)+ → D0π+. 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(-1). The D0 is reconstructed in the decay modes D0 → K- π+ and D0 → K- π+ π- π+. For the decay mode D0 → K- π+ we obtain Γ = (83.4±1.7±1.5)  keV and Δm0 = (145425.6±0.6±1.7)  keV, [corrected] where the quoted errors are statistical and systematic, respectively. For the D0 → K- π+ π- π+ mode we obtain Γ = (83.2±1.5±2.6)  keV and Δm0 = (145426.6±0.5±1.9)  keV. [corrected] The combined measurements yield Γ = (83.3±1.2±1.4)  keV and Δm0 = (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.

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