We present the observation of the decay B-0 -> chi K-c0(*0) as well as evidence of B+ -> chi K-c0(*+), with an 8.9 and a 3.6 standard deviation significance, respectively, using a data sample of 454 X 10(6) Y(4S) -> B (B) over bar decays collected with the BABAR detector at the PEP-II B meson factory located at the Stanford Linear Accelerator Center (SLAC). The measured branching fractions are B(B-0 -> chi K-c0(*0)) = (1.7 +/- 0.3 +/- 0.2) x 10(-4) and B(B+ -> chi K-c0(*+)) = (1.4 +/- 0.5 +/- 0.2) x 10(-4), where the first quoted errors are statistical and the second are systematic. We obtain a branching fraction upper limit of B(B+ -> chi K-c0(*+)) < 2.1 x 10(-4) at the 90% confidence level.
Observation of B-0 -> chi K-c0*(0) and evidence for B+ -> chi K-c0*(+)
ANDREOTTI, Mirco;CALABRESE, Roberto;CECCHI, Annalisa;CIBINETTO, Gianluigi;FRANCHINI, Paolo;LUPPI, Eleonora;NEGRINI, Matteo;PETRELLA, Antonio;SANTORO, Valentina;
2008
Abstract
We present the observation of the decay B-0 -> chi K-c0(*0) as well as evidence of B+ -> chi K-c0(*+), with an 8.9 and a 3.6 standard deviation significance, respectively, using a data sample of 454 X 10(6) Y(4S) -> B (B) over bar decays collected with the BABAR detector at the PEP-II B meson factory located at the Stanford Linear Accelerator Center (SLAC). The measured branching fractions are B(B-0 -> chi K-c0(*0)) = (1.7 +/- 0.3 +/- 0.2) x 10(-4) and B(B+ -> chi K-c0(*+)) = (1.4 +/- 0.5 +/- 0.2) x 10(-4), where the first quoted errors are statistical and the second are systematic. We obtain a branching fraction upper limit of B(B+ -> chi K-c0(*+)) < 2.1 x 10(-4) at the 90% confidence level.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
