HAL : in2p3-00165456, version 1
 arXiv : 0707.2980
 Physical Review D 77 (2008) 012003
 Measurement of the CP-Violating Asymmetries in $B^0 \to K^0_S \pi^0$ and of the Branching Fraction of $B^0 \to K^0 \pi^0$
 BABAR Collaboration(s)
 (2008)
 We present a measurement of the time-dependent CP-violating asymmetries in $B^0 \to K^0_{\scriptscriptstyle S}\pi^0$ decays based on 383 million $\Upsilon(4S)\to B\kern 0.18em\bar{\kern -0.18em B}$ events collected by the \mbox{\slshape B\kern-0.1em{\smaller A}\kern-0.1em B\kern-0.1em{\smaller A\kern-0.2em R}} experiment at the PEP-II asymmetric-energy $B$ Factory at SLAC. We measure the direct CP-violating asymmetry $C_{K^0_{\scriptscriptstyle S}\pi^0} = 0.24 \pm 0.15 \pm 0.03$ and the CP-violating asymmetry in the interference between mixing and decay $S_{K^0_{\scriptscriptstyle S}\pi^0} = 0.40 \pm 0.23 \pm 0.03$, where the first errors are statistical and the second are systematic. On the same sample, we measure the decay branching fraction, obtaining ${\cal B}(B^0 \to K^0\pi^0)= (10.3 \pm 0.7 \pm 0.6)\times 10^{-6}$.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
 Lien vers le texte intégral : http://fr.arXiv.org/abs/0707.2980
 in2p3-00165456, version 1 http://hal.in2p3.fr/in2p3-00165456 oai:hal.in2p3.fr:in2p3-00165456 Contributeur : Dominique Girod <> Soumis le : Jeudi 26 Juillet 2007, 11:22:19 Dernière modification le : Vendredi 1 Février 2008, 10:33:17