Measurement of charm meson lifetimes

Bonvicini, G.; Cinabro, D.; Greene, R.; Perera, L.P.; Zhou, G.J.; Chan, S.; Eigen, G.; Lipeles, Elliot David; Schmidtler, M.; Shapiro, A.

doi:10.1103/PhysRevLett.82.4586

Measurement of charm meson lifetimes

CLEO

Collaboration

•

G. Bonvicini
(
- Wayne State U.
)

Feb, 1999

10 pages

Published in:

Phys.Rev.Lett. 82 (1999) 4586-4590

e-Print:

hep-ex/9902011 [hep-ex]

DOI:

10.1103/PhysRevLett.82.4586

PDG:

{{\mathit D}^{\pm}}

MEAN LIFE

Report number:

SLAC-REPRINT-1999-096,
CLNS-99-1603,
CLEO-99-2

Experiments:

CESR-CLEO-II

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Abstract:

We report measurements of the

D^0

,

D^+

, and

D^+_s

meson lifetimes using

3.7 fb^{-1}

of e^+e^- annihilation data collected near the

\Upsilon(4S)

resonance with the CLEO detector. The lifetimes of the

D^0, D^+

, and

D^+_s

mesons are measured to be

408.5 \pm 4.1 ^{+3.5}_{-3.4} fs, 1033.6 \pm 22.1 ^{+9.9}_{-12.7} fs

, and

486.3 \pm 15.0 ^{+4.9}_{-5.1} fs

, respectively. The precisions of the charm meson lifetimes reported here are comparable to those of the best previous measurements, and the systematic errors are very different. In a single experiment we find that the ratio of the

D^+_s

and

D^0

lifetimes differs from one by more than 4.5 standard deviations.

electron positron: colliding beams
electron positron: annihilation
charmed meson: electroproduction
D0
D+
D/s+
charmed meson: hadronic decay
charmed meson: lifetime
CLEO
experimental results

References(8)

Figures(0)

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