6533b7d4fe1ef96bd1262fd7

RESEARCH PRODUCT

Search for B -> K-(*()) v(v)over-bar and invisible quarkonium decays

subject

description

We search for the flavor-changing neutral-current decays B -> K-(*()) v (v) over bar, and the invisible decays J/psi -> v (v) over bar and psi(2S) -> v (v) over bar via B -> K-(*())J/psi and B -> K-(*()) psi(2S), respectively, using a data sample of 471 x 10(6) B (B) over bar pairs collected by the BABAR experiment. We fully reconstruct the hadronBic decay of one of the B mesons in the Y(4S) -> B (B) over bar decay, and search for the B -> K-(*()) v (v) over bar decay in the rest of the event. We observe no significant excess of signal decays over background and report branching fraction upper limits of B(B+ -> K+ v (v) over bar) K-0 v) K*(+) v) K*(0) v), K v) K* v) v) v K-(*()) v decays over the full kinematic spectrum.