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Evidence for charged B meson decays to a1+/-(1260)pi0 and a1(0)(1260)pi+/- |
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| Authors: | Aubert B Bona M Boutigny D Karyotakis Y Lees J P Poireau V Prudent X Tisserand V Zghiche A Garra Tico J Grauges E Lopez L Palano A Eigen G Stugu B Sun L Abrams G S Battaglia M Brown D N Button-Shafer J Cahn R N Groysman Y Jacobsen R G Kadyk J A Kerth L T Kolomensky Yu G Kukartsev G Lopes Pegna D Lynch G Mir L M Orimoto T J Ronan M T Tackmann K Wenzel W A Del Amo Sanchez P Hawkes C M Watson A T Held T Koch H Lewandowski B Pelizaeus M Schroeder T Steinke M Walker D Asgeirsson D J Cuhadar-Donszelmann T Fulsom B G Hearty C Mattison T S McKenna J A Khan A Saleem M Teodorescu L Blinov V E Bukin A D |
| Institution: | Laboratoire de Physique des Particules, IN2P3/CNRS et Université de Savoie, F-74941 Annecy-Le-Vieux, France. |
| Abstract: | We present measurements of the branching fractions for the decays B;{+/-}-->a_{1};{+/-}(1260)pi;{0} and B;{+/-}-->a_{1};{0}(1260)pi;{+/-} from a data sample of 232x10;{6} BBover ] pairs produced in e;{+}e;{-} annihilation through the Upsilon(4S) resonance. We measure the branching fraction B(B;{+/-}-->a_{1};{+/-}(1260)pi;{0})xB(a_{1};{+/-}(1260)-->pi;{-}pi;{+}pi;{+/-})=(13.2+/-2.7+/-2.1)x10;{-6} with a significance of 4.2sigma, and the branching fraction B(B;{+/-}-->a_{1};{0}(1260)pi;{+/-})xB(a_{1};{0}(1260)-->pi;{-}pi;{+}pi;{0})=(20.4+/-4.7+/-3.4)x10;{-6} with a significance of 3.8sigma, where the first error quoted is statistical and the second is systematic. |
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