We present a search for the decays B -> K(*)nu(nu)overbar using 454x10(6)B(B)overbar pairs collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. We first select an event sample where one B is reconstructed in a semileptonic or hadronic mode with one charmed meson. The remaining particles in the event are then examined to search for a B -> K(*)nu(nu)overbar decay. The charged K(*) is reconstructed as K(*+)-> K(S)(0)pi(+) or K(*+)-> K(+)pi(0); the neutral K(*) is identified in K(*0)-> K(+)pi(-) mode. We establish upper limits at 90% confidence level of B(B(+)-> K(*+)nu(nu)overbar>)< 8x10(-5), B(B(0)-> K(*0)nu(nu)overbar)< 12x10(-5), and B(B -> K(*)nu(nu)overbar)< 8x10(-5).

Search for B -> K(*)nu(nu)overbar decays

PALANO, Antimo;PAPPAGALLO, MARCO IGNAZIO;
2008-01-01

Abstract

We present a search for the decays B -> K(*)nu(nu)overbar using 454x10(6)B(B)overbar pairs collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. We first select an event sample where one B is reconstructed in a semileptonic or hadronic mode with one charmed meson. The remaining particles in the event are then examined to search for a B -> K(*)nu(nu)overbar decay. The charged K(*) is reconstructed as K(*+)-> K(S)(0)pi(+) or K(*+)-> K(+)pi(0); the neutral K(*) is identified in K(*0)-> K(+)pi(-) mode. We establish upper limits at 90% confidence level of B(B(+)-> K(*+)nu(nu)overbar>)< 8x10(-5), B(B(0)-> K(*0)nu(nu)overbar)< 12x10(-5), and B(B -> K(*)nu(nu)overbar)< 8x10(-5).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/28408
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