We search for the rare flavor-changing neutral-current decay B+ → K+ νν̄ in a data sample of 82 fb-1 collected with the BABAR detector at the PEP-II S-factory. Signal events are selected by examining the properties of the system recoiling against either a reconstructed hadronic or semileptonic charged-B decay. Using these two independent samples we obtain a combined limit of ℬ(B+ →K+ νν̄) ≤ 5.2 × 10-5 at the 90% confidence level In addition, by selecting for pions rather than kaons, we obtain a limit of ℬ(B+ → π+ νν̄) < 1.0 × 10-4 using only the hadronic B reconstruction method.

Aubert, B., Barate, R., Boutigny, D., Couderc, F., Gaillard, J., Hicheur, A., et al. (2005). Search for the decay B+ → K+ νν̄. PHYSICAL REVIEW LETTERS, 94(10) [10.1103/PhysRevLett.94.101801].

Search for the decay B+ → K+ νν̄

CARPINELLI, Massimo;
2005

Abstract

We search for the rare flavor-changing neutral-current decay B+ → K+ νν̄ in a data sample of 82 fb-1 collected with the BABAR detector at the PEP-II S-factory. Signal events are selected by examining the properties of the system recoiling against either a reconstructed hadronic or semileptonic charged-B decay. Using these two independent samples we obtain a combined limit of ℬ(B+ →K+ νν̄) ≤ 5.2 × 10-5 at the 90% confidence level In addition, by selecting for pions rather than kaons, we obtain a limit of ℬ(B+ → π+ νν̄) < 1.0 × 10-4 using only the hadronic B reconstruction method.
Articolo in rivista - Articolo scientifico
Calorimeters; Charged particles; Elementary particles; Kinematics; Particle detectors; Photons; Resonance; Heavy particles; Magnetic calorimeters; Mesons; Particle identification (PID); High energy physics;
English
2005
94
10
101801
none
Aubert, B., Barate, R., Boutigny, D., Couderc, F., Gaillard, J., Hicheur, A., et al. (2005). Search for the decay B+ → K+ νν̄. PHYSICAL REVIEW LETTERS, 94(10) [10.1103/PhysRevLett.94.101801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389852
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