Search for B0 Decays to Invisible Final States and to νν¯γ

B. Aubert et al. (BABAR Collaboration)
Phys. Rev. Lett. 93, 091802 – Published 25 August 2004

Abstract

We establish upper limits on branching fractions for B0 decays to final states where the decay products are purely invisible (i.e., no observable final state particles) and for B0 decays to νν¯γ. Within the standard model, these decays have branching fractions that are below current experimental sensitivity, but various models of physics beyond the standard model predict significant contributions from these channels. Using 88.5×106 BB¯ pairs collected at the Υ(4S) resonance by the BABAR experiment at the PEP-II e+e storage ring at the Stanford Linear Accelerator Center, we establish upper limits at the 90% confidence level of 22×105 for the branching fraction of B0invisible and 4.7×105 for the branching fraction of B0νν¯γ.

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  • Received 24 May 2004

DOI:https://doi.org/10.1103/PhysRevLett.93.091802

©2004 American Physical Society

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Vol. 93, Iss. 9 — 27 August 2004

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