New measurements of Ds + and Ds*+ meson production rates from B decays and from qq̄ continuum events near the Y(4S) resonance are presented. Using 20.8 fb-1 of data on the Y(4S) resonance and 2.6 fb-1 off-resonance, we find the inclusive branching fractions B(B→Ds + X)=(10.93±0.19±0.58±2.73)% and B(B→Ds*+X)=(7.9±0.8±0.7 ±2.0)%, where the first error is statistical, the second is systematic, and the third is due to the Ds +→φπ+ branching fraction uncertainty. The production cross sections σ(e+e- →Ds +X) × B(Ds +→φπ+)=7.55±0.20 ±0.34 pb and σ(e+e-→Ds *±X) × B(Ds +→φπ+) = 5.8±0.7±0.5 pb are measured at center-of-mass energies about 40 MeV below the Y(4S) mass. The branching fractions ΣB(B→Ds (*)+ D̄(*))=(5.07±0.14±0.30±1.27)% and ∑B(B→Ds *+D̄(*)) =(4.1±0.2±0.4±1.0)% are determined from the Ds (*)+ momentum spectra. The mass difference m(Ds +)-m(D+)=98.4±0.1 ±0.3 MeV/c2 is also measured.

Aubert, B., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., Lees, J., et al. (2002). Measurement of Ds + and Ds*+ production in B meson decays and from continuum e+e- annihilation at √s = 10.6 GeV. PHYSICAL REVIEW D, 65(9), 1-8 [10.1103/PhysRevD.65.091104].

Measurement of Ds + and Ds*+ production in B meson decays and from continuum e+e- annihilation at √s = 10.6 GeV

CARPINELLI, Massimo;
2002

Abstract

New measurements of Ds + and Ds*+ meson production rates from B decays and from qq̄ continuum events near the Y(4S) resonance are presented. Using 20.8 fb-1 of data on the Y(4S) resonance and 2.6 fb-1 off-resonance, we find the inclusive branching fractions B(B→Ds + X)=(10.93±0.19±0.58±2.73)% and B(B→Ds*+X)=(7.9±0.8±0.7 ±2.0)%, where the first error is statistical, the second is systematic, and the third is due to the Ds +→φπ+ branching fraction uncertainty. The production cross sections σ(e+e- →Ds +X) × B(Ds +→φπ+)=7.55±0.20 ±0.34 pb and σ(e+e-→Ds *±X) × B(Ds +→φπ+) = 5.8±0.7±0.5 pb are measured at center-of-mass energies about 40 MeV below the Y(4S) mass. The branching fractions ΣB(B→Ds (*)+ D̄(*))=(5.07±0.14±0.30±1.27)% and ∑B(B→Ds *+D̄(*)) =(4.1±0.2±0.4±1.0)% are determined from the Ds (*)+ momentum spectra. The mass difference m(Ds +)-m(D+)=98.4±0.1 ±0.3 MeV/c2 is also measured.
Articolo in rivista - Articolo scientifico
article; elementary particle; energy; mass; measurement; Monte Carlo method; quantum mechanics; statistical model;
English
2002
65
9
1
8
091104
none
Aubert, B., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., Lees, J., et al. (2002). Measurement of Ds + and Ds*+ production in B meson decays and from continuum e+e- annihilation at √s = 10.6 GeV. PHYSICAL REVIEW D, 65(9), 1-8 [10.1103/PhysRevD.65.091104].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390027
Citazioni
  • Scopus 23
  • ???jsp.display-item.citation.isi??? 15
Social impact