Search for heavy neutrinos at Belle
Belle Collaboration: D. Liventsev, I. Adachi, H. Aihara, K. Arinstein,, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bay, K. Belous, B., Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, P., Chang, V. Chekelian, A. Chen, B. G. Cheon, R. Chistov
TL;DR
This paper reports a search for heavy neutrinos in B-meson decays using Belle detector data, setting upper limits on neutrino mixing in the 0.5-5.0 GeV/c^2 mass range, with no signal observed.
Contribution
First search for heavy neutrinos in B-meson decays at Belle, establishing new upper limits on mixing parameters in the specified mass range.
Findings
No evidence of heavy neutrinos found.
Set upper limits on mixing parameters.
Analyzed 772 million B-meson pairs.
Abstract
We report on a search for heavy neutrinos in B-meson decays. The results are obtained using a data sample that contains 772x10^6 BB-bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. No signal is observed and upper limits are set on mixing of heavy neutrinos with left-handed neutrinos of the Standard Model in the mass range 0.5 - 5.0 GeV/c^2.
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