Measurement of the D*(2010)+ meson width and the D*(2010)+ - D0 mass difference - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review Letters Year : 2013

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

N. Arnaud

Abstract

Measurements of the mass difference \Delta m_0 between the D*(2010)+ and the D0 mesons and of the natural line width \Gamma of the transition D*(2010)+ -> D0 \pi+ are presented. The data were recorded with the BABAR detector at center-of-mass energies at and near the \Upsilon(4S) resonance, and correspond to an integrated luminosity of approximately 477 1/fb. The D0 meson is reconstructed in the decay modes D0 -> K-\pi+ and D0 -> K-\pi+\pi-\pi+. For the decay mode D0 -> K-\pi+ we obtain \Gamma = (83.4 +- 1.7 +- 1.5) keV and \Delta m_0 = (145 425.6 +- 0.6 +- 1.8) keV, where the quoted uncertainties are statistical and systematic, respectively. For the D0 -> K-\pi+\pi-\pi+ mode we obtain \Gamma = (83.2 +- 1.5 +- 2.6) keV and \Delta m_0 = (145 426.6 +- 0.5 +- 2.0) keV. The combined measurements yield \Gamma = (83.3 +- 1.3 +- 1.4) keV and \Delta m_0 = (145 425.8 +- 0.5 +- 1.8) keV; the result for the width is approximately 12 times more precise than the current world average, while that for the mass difference is more precise by a factor of approximately 6.

Dates and versions

in2p3-00816858 , version 1 (23-04-2013)

Identifiers

Cite

J. P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, et al.. Measurement of the D*(2010)+ meson width and the D*(2010)+ - D0 mass difference. Physical Review Letters, 2013, 111, pp.111801. ⟨10.1103/PhysRevLett.111.111801⟩. ⟨in2p3-00816858⟩
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