Using 230.2fb-1 of e+e- annihilation data collected with the BABAR detector at and near the peak of the Υ(4S) resonance, 489±55 events containing the pure leptonic decay Ds+→μ+νμ have been isolated in charm-tagged events. The ratio of partial widths Γ(Ds+→μ+νμ) /Γ(Ds+→ π+) is measured to be 0.143±0.018±0.006 allowing a determination of the pseudoscalar decay constant fDs= (283±17±7±14)MeV. The errors are statistical, systematic, and from the Ds+→ π+ branching ratio, respectively. © 2007 The American Physical Society.

Aubert, B., Barate, R., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., et al. (2007). Measurement of the pseudoscalar decay constant fDs using charm-tagged events in e+e- collisions at s=10.58GeV. PHYSICAL REVIEW LETTERS, 98(14), 1-7 [10.1103/PhysRevLett.98.141801].

Measurement of the pseudoscalar decay constant fDs using charm-tagged events in e+e- collisions at s=10.58GeV

PATRIGNANI, CLAUDIA;
2007

Abstract

Using 230.2fb-1 of e+e- annihilation data collected with the BABAR detector at and near the peak of the Υ(4S) resonance, 489±55 events containing the pure leptonic decay Ds+→μ+νμ have been isolated in charm-tagged events. The ratio of partial widths Γ(Ds+→μ+νμ) /Γ(Ds+→ π+) is measured to be 0.143±0.018±0.006 allowing a determination of the pseudoscalar decay constant fDs= (283±17±7±14)MeV. The errors are statistical, systematic, and from the Ds+→ π+ branching ratio, respectively. © 2007 The American Physical Society.
2007
Aubert, B., Barate, R., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., et al. (2007). Measurement of the pseudoscalar decay constant fDs using charm-tagged events in e+e- collisions at s=10.58GeV. PHYSICAL REVIEW LETTERS, 98(14), 1-7 [10.1103/PhysRevLett.98.141801].
Aubert, B; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Tisserand, V.; Zghiche, A.; Grauges, E.; Palano, ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/550605
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