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Improved Limits on B0 Decays to Invisible (+gamma) Final States

Abstract : We establish improved upper limits on branching fractions for B0 decays to final States 10 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 million BB pairs collected at the Y(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 2.4x10^-5 for the branching fraction of B0-->Invisible and 1.7x10^-5 for the branching fraction of B0-->Invisible+gamma
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http://hal.in2p3.fr/in2p3-00743558
Contributor : Sabine Starita <>
Submitted on : Friday, October 19, 2012 - 2:22:47 PM
Last modification on : Wednesday, September 16, 2020 - 4:22:20 PM

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J.P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, et al.. Improved Limits on B0 Decays to Invisible (+gamma) Final States. Physical Review D, American Physical Society, 2012, 86, pp.051105. ⟨10.1103/PhysRevD.86.051105⟩. ⟨in2p3-00743558⟩

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