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-→Λpbar ννbar 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-→Λpbar ννbar 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-→Λpbar ννbar)<3.0×10-5 at the 90% confidence level.

Search for B-→ Λ pbar ν νbar with the BaBar experiment

Pilloni A.;
2019-01-01

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-→Λpbar ννbar 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-→Λpbar ννbar 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-→Λpbar ννbar)<3.0×10-5 at the 90% confidence level.
2019
Inglese
American Physical Society
100
11
111101
111108
8
Internazionale
Esperti anonimi
info:eu-repo/semantics/article
Lees, J. P.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Brown, D. N.; Kolomensky, Y. G.; Fritsch, M.; Koch, H.; Schroeder, T.; Ch...espandi
14.a Contributo in Rivista::14.a.1 Articolo su rivista
238
262
none
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/3208466
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