• Open Access

Search for heavy Majorana neutrino in lepton number violating decays of DKπe+e+

M. Ablikim et al. (BESIII Collaboration)
Phys. Rev. D 99, 112002 – Published 6 June 2019

Abstract

Using a data sample with an integrated luminosity of 2.93fb1 taken at the center-of-mass energy of 3.773 GeV, we search for the Majorana neutrino (νm) in the lepton number violating decays DKπe+e+. No significant signal is observed, and the upper limits on the branching fraction at the 90% confidence level are set to be B(D0Kπe+e+)<2.8×106, B(D+KS0πe+e+)<3.3×106 and B(D+Kπ0e+e+)<8.5×106. The Majorana neutrino is searched for with different mass assumptions ranging from 0.25 to 1.0GeV/c2 in the decays D0Ke+νm,νmπe+ and D+KS0e+νm,νmπe+, and the upper limits on the branching fraction at the 90% confidence level are at the level of 107106, depending on the mass of the Majorana neutrino. The constraints on the mixing matrix element |Veνm|2 are also evaluated.

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  • Received 7 February 2019

DOI:https://doi.org/10.1103/PhysRevD.99.112002

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

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Vol. 99, Iss. 11 — 1 June 2019

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