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±1.8) keV, 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±2.0) keV. 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.

Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2013). Measurement of the D*(2010)+ natural linewidth and the D*(2010)+-D0 mass difference. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 88(5) [10.1103/PhysRevD.88.052003].

Measurement of the D*(2010)+ natural linewidth and the D*(2010)+-D0 mass difference

CARPINELLI, Massimo
Membro del Collaboration Group
;
2013

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±1.8) keV, 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±2.0) keV. 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.
Articolo in rivista - Articolo scientifico
BABAR detector
English
Carpinelli Massimo (BABAR Collaboration)
Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2013). Measurement of the D*(2010)+ natural linewidth and the D*(2010)+-D0 mass difference. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 88(5) [10.1103/PhysRevD.88.052003].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389234
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