A search for the rare flavor-changing neutral current process B-→Λpνν using data from the BABAR experiment has been performed. A total of 424 fb-1 of e+e-collision data collected at the center-of-mass energy of the Ï'(4S) resonance is used in this study, corresponding to a sample of (471±3)×106 BB pairs. Signal B-→Λpνν candidates are identified by first fully reconstructing a B+ decay in one of many possible exclusive decays to hadronic final states, then examining detector activity that is not associated with this reconstructed B+ decay for evidence of a signal B-→Λpνν decay. The data yield is found to be consistent with the expected background contribution under a null signal hypothesis, resulting in an upper limit of B(B-→Λpνν)<3.0×10-5 at the 90% confidence level.

Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2019). Search for B-→ Λ p ν ν with the B a B ar experiment SEARCH for B-→ Λ p ν ν ... LEES J. P. et al. PHYSICAL REVIEW D, 100(11) [10.1103/PhysRevD.100.111101].

Search for B-→ Λ p ν ν with the B a B ar experiment SEARCH for B-→ Λ p ν ν ... LEES J. P. et al

Carpinelli M.;
2019

Abstract

A search for the rare flavor-changing neutral current process B-→Λpνν using data from the BABAR experiment has been performed. A total of 424 fb-1 of e+e-collision data collected at the center-of-mass energy of the Ï'(4S) resonance is used in this study, corresponding to a sample of (471±3)×106 BB pairs. Signal B-→Λpνν candidates are identified by first fully reconstructing a B+ decay in one of many possible exclusive decays to hadronic final states, then examining detector activity that is not associated with this reconstructed B+ decay for evidence of a signal B-→Λpνν decay. The data yield is found to be consistent with the expected background contribution under a null signal hypothesis, resulting in an upper limit of B(B-→Λpνν)<3.0×10-5 at the 90% confidence level.
Articolo in rivista - Articolo scientifico
BaBar
English
2019
100
11
111101
none
Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2019). Search for B-→ Λ p ν ν with the B a B ar experiment SEARCH for B-→ Λ p ν ν ... LEES J. P. et al. PHYSICAL REVIEW D, 100(11) [10.1103/PhysRevD.100.111101].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/395236
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