Measurement of the $D*(2010)^+$ meson width and the $D*(2010)^+ - D^0$ mass difference - INSPIRE

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Measurement of the $D(2010)^+$ meson width and the $D(2010)^+ - D^0$ mass difference

BaBar

Collaboration

Apr 20, 2013

8 pages

Published in:

Phys.Rev.Lett. 111 (2013) 11, 111801

Published: Sep 9, 2013

e-Print:

1304.5657 [hep-ex]

DOI:

PDG:

{\mathit m}_{{{\mathit D}^{*}{(2010)}^{+}}}-{\mathit m}_{{{\mathit D}^{0}}}

Report number:

BABAR-PUB-13-004,
SLAC-PUB-15424

Experiments:

SLAC-PEP2-BABAR

View in:

reference search57 citations

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Abstract: (APS)

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.

Note:

7 pages, 2 figures, accepted by Phys. Rev. Lett

13.20.Fc
13.25.Ft
14.40.Lb
12.38.Gc
12.38.Qk
12.39.Ki
12.39.Pn
D0: hadronic decay
D*(2010)+: width: measured
D*(2010)+: hadronic decay

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