Observation of B[sup 0] Meson Decay to [alpha][sub 1][sup +](1260) [pi][sup -].

Download or read book Observation of B[sup 0] Meson Decay to [alpha][sub 1][sup +](1260) [pi][sup -]. written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a preliminary measurement of the branching fraction of the B meson decay B[sup 0] --> [alpha][sup 1][sup +](1260) --> [pi][sup +][pi][sup +][pi][sup -]. The data were recorded with the BABAR detector at the SLAC B factory PEP-II and correspond to 124 x 10[sup 6] B[bar B] pairs produced in e[sup +]e[sup -] annihilation through the [Upsilon](4S) resonance. They find the branching fraction B(B[sup 0] --> [alpha][sub 1][sup +](1260)[pi][sup -]) = (42.6 [+-] 4.2 [+-] 4.1) x 10[sup -6]. The fitted values of the [alpha][sub 1](1260) parameters are m[sub [alpha][sub 1]] = 1.19 [+-] 0.02 GeV/c[sup 2] and [Gamma][sub [alpha][sub 1]] = 312 [+-] 55 MeV/c[sup 2].