Measurement of the D*(2010)+ Natural Line 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 D Year : 2013

Measurement of the D*(2010)+ Natural Line Width and the D*(2010)+ - D0 Mass Difference

N. Arnaud

Abstract

We measure the the mass difference, \Delta m_0, between the D*(2010)+ and the D0 and the natural line width, \Gamma, of the transition D*(2010)+ -> D0 \pi+. 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 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 errors 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 width is a factor of approximately 12 times more precise than the best previous value, while the mass difference is a factor of approximately 6 times more precise.

Dates and versions

in2p3-00816378 , version 1 (22-04-2013)

Identifiers

Cite

J.P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, et al.. Measurement of the D*(2010)+ Natural Line Width and the D*(2010)+ - D0 Mass Difference. Physical Review D, 2013, 88, pp.052003. ⟨10.1103/PhysRevD.88.052003⟩. ⟨in2p3-00816378⟩
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