Improved limits on B^0 decays to invisible (+γ) final states
Abstract
We establish improved upper limits on branching fractions for B^0 decays to final states where the decay products are purely invisible (i.e., no observable final state particles) and for final states where the only visible product is a photon. Within the Standard Model, these decays have branching fractions that are below the current experimental sensitivity, but various models of physics beyond the Standard Model predict significant contributions for these channels. Using 471×10^6 BB pairs collected at the Υ(4S) resonance by the BABAR experiment at the PEP-II e^+e^- storage ring at the SLAC National Accelerator Laboratory, we establish upper limits at the 90% confidence level of 2.4×10^(-5) for the branching fraction of B^0 → invisible and 1.7×10^(-5) for the branching fraction of B^0 → invisible + γ.
Additional Information
© 2012 American Physical Society. Received 13 June 2012; published 27 September 2012. We are grateful for the excellent luminosity and machine conditions provided by our PEP-II colleagues, and for the substantial dedicated effort from the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (USA), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MICIIN (Spain), and STFC (United Kingdom). Individuals have received support from the Marie Curie EIF (European Union) and the A. P. Sloan Foundation (USA).Attached Files
Published - PhysRevD.86.051105.pdf
Files
PhysRevD.86.051105.pdf
Additional details
Identifiers
- Eprint ID
- 35137
- Resolver ID
- CaltechAUTHORS:20121029-074327757
Funding
- Department of Energy (DOE)
- NSF
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Commissariat à l'Energie Atomique (CEA)
- BMBF
- Istituto Nazionale di Fisica Nucleare (INFN)
- Stichting voor Fundamenteel Onderzoek der Materie (FOM)
- Norwegian Research Council
- Ministry of Education and Science of the Russian Federation
- MICIIN (Spain)
- Science and Technology Facilities Council (STFC)
- Marie Curie Fellowship
- Alfred P. Sloan Foundation
- Centre National de la Recherche Scientifique (CNRS)
- Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)
- Deutsche Forschungsgemeinschaft (DFG)
Dates
- Created
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2012-10-29Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field