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

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

Physical review letters, 13 September 2013, Vol.111(11), pp.111801 [Periódico revisado por pares]

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  • Título:
    Measurement of the D*(2010)+ meson width and the D*(2010)+ - D0 mass difference
  • Autor: 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
  • Assuntos: Luminosity ; Decay
  • É parte de: Physical review letters, 13 September 2013, Vol.111(11), pp.111801
  • Descrição: 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.
  • Idioma: Inglês

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