Search for a massive invisible particle X{sup 0} in B{sup +} → e{sup +}X{sup 0} and B{sup +} → μ{sup +}X{sup 0} decays
Journal Article
·
· Physics of Atomic Nuclei
- Yonsei University (Korea, Republic of)
We present a search for a non-Standard-Model invisible particle X{sup 0} in the mass range 0.1–1.8 GeV/c{sup 2} in B{sup +} → e{sup +}X{sup 0} and B{sup +} → μ{sup +}X{sup 0} decays. The results are obtained from a 711 fb{sup −1} data sample which corresponds to 772 × 10{sup 6}BB̄ pairs, collected at the Υ(4S) resonance with the Belle detector at the KEKB e{sup +}e{sup −} 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{sup −6}.
- OSTI ID:
- 22758681
- Journal Information:
- Physics of Atomic Nuclei, Vol. 80, Issue 5; Other Information: Copyright (c) 2017 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
- Country of Publication:
- United States
- Language:
- English
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