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Published September 9, 2013 | Erratum + Submitted + Published
Journal Article Open

Measurement of the D^*(2010)^+ Meson Width and the D^*(2010)^+-D^0 Mass Difference


We measure the mass difference Δm0 between the D^*(2010)^+ and the D^0 and the natural linewidth Γ of the transition D^*(2010)^+→D^0π^+. 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 D^0→K^-π^+ and D^0→K^-π^+π^-π^+. For the decay mode D^0→K^-π^+ we obtain Γ=(83.4±1.7±1.5)  keV and Δm_0=(145425.6±0.6±1.8)  keV, where the quoted errors are statistical and systematic, respectively. For the D^0→K^-π^+π^-π^+ mode we obtain Γ=(83.2±1.5±2.6)  keV and Δm_0=(145426.6±0.5±2.0)  keV. The combined measurements yield Γ=(83.3±1.2±1.4)  keV and Δm_0=(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.

Additional Information

© 2013 American Physical Society. Received 23 April 2013; published 9 September 2013 We are grateful for the excellent luminosity and machine conditions provided by our PEP-II colleagues, and for the substantial dedicated effort from the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (U.S.), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (Netherlands), NFR (Norway), MES (Russia), MINECO (Spain), STFC (United Kingdom). Individuals have received support from the Marie Curie EIF (European Union) and the A. P. Sloan Foundation (U.S.). The University of Cincinnati is gratefully acknowledged for its support of this research through a WISE (Women in Science and Engineering) fellowship to C. Fabby.

Attached Files

Published - PhysRevLett.111.111801.pdf

Submitted - 1304.5657v2.pdf

Erratum - PhysRevLett.111.169902.pdf


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