298 articles – 2312 Notices  [english version]
 HAL : in2p3-00011482, version 1
 arXiv : hep-ex/0107060
 International Symposium on Lepton and Photon Interactions at High Energies 20 Lepton Photon 01, Rome : Italie
 Measurement of $D_s^+$ and $D_s^{*+}$ production in $B$ meson decays and from continuum $e^+e^-$ annihilations at $\sqrt{s}$ = 10.6 GeV
 BABAR Collaboration(s)
 (2001)
 New precise measurements of $D_s^+$ and $D_s^{*+}$ meson production from $B$ mesons and $q\overline q$ continuum events near the $\Upsilon(4S)$ resonance are presented in this paper. Using the BABAR data recorded in 1999 and 2000 of 20.8 fb$^{-1}$ on-resonance and 2.6 fb$^{-1}$ off-resonance, we measure the inclusive branching fractions ${\cal B}(B\to D_s^+ X) = (10.93\pm 0.19\pm 0.58\pm 2.73)%$ and ${\cal B}(B\to D_s^{*+} X) = (7.94\pm 0.82\pm 0.72\pm 1.99)%$, where the first error is statistical, the second is the systematic error, and the third is the error due to the $D_s^+\to\phi\pi^+$ branching fraction uncertainty. The branching fractions $\Sigma {\cal B}(B\to D_s^{(*)+} \overline D^{(*)}) = (5.07\pm 0.09\pm 0.34\pm 1.27)%$ and $\Sigma {\cal B}(B\to D_s^{*+} \overline D^{(*)}) = (4.07\pm 0.42\pm 0.53\pm 1.02)%$ have been determined from the measured $D_s^{(*)+}$ momentum spectra.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
 Lien vers le texte intégral : http://fr.arXiv.org/abs/hep-ex/0107060
 in2p3-00011482, version 1 http://hal.in2p3.fr/in2p3-00011482 oai:hal.in2p3.fr:in2p3-00011482 Contributeur : Nicole Berger <> Soumis le : Vendredi 3 Mai 2002, 11:43:06 Dernière modification le : Vendredi 3 Mai 2002, 11:43:06