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Search for a massive invisible particle X 0 in B + → e + X 0 and B + → μ + X 0 decays

  • XIX International Moscow School of Physics (44th ITEPWinter School of Physics) and International School of Physics “QCD and Exotic Hadrons” February 16–23, 2016, Serpukhov, Russia/Elementary Particles and Fields
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Abstract

We present a search for a non-Standard-Model invisible particle X 0 in the mass range 0.1–1.8 GeV/c 2 in B + → e + X 0 and B + → μ + X 0 decays. The results are obtained from a 711 fb−1 data sample which corresponds to 772 × 106 \(B\bar B\) pairs, collected at the Υ(4S) resonance with the Belle detector at the KEKB e + e − collider. One B meson is fully reconstructed in a hadronic mode to determine the momentum of the lepton of the signal decay in the rest frame of the recoiling partner B meson. We find no evidence of a signal and set upper limits on the order of 10−6.

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Authors and Affiliations

  1. Yonsei University, Seoul, Korea

    Chanseok Park

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  1. Chanseok Park
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Correspondence to Chanseok Park.

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Park, C. Search for a massive invisible particle X 0 in B + → e + X 0 and B + → μ + X 0 decays. Phys. Atom. Nuclei 80, 983–986 (2017). https://doi.org/10.1134/S1063778817050209

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  • DOI: https://doi.org/10.1134/S1063778817050209

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