@Article{NA48/2CollaborationBatley+Fiorini2017,
author="NA48/2 Collaboration (Batley, J. R. et al
and Fiorini, L.",
title="Searches for lepton number violation and resonances in K-+/- -> pi $\mu$$\mu$decays",
journal="Physics Letters B",
year="2017",
publisher="Elsevier Science Bv",
volume="769",
pages="67--76",
abstract="The NA48/2 experiment at CERN collected a large sample of charged kaon decays to final states with multiple charged particles in 2003-2004. A new upper limit on the rate of the lepton number violating decay K-+/- -> pi(+/-)mu(+/-)mu(+/-) is reported: B( K-+/- -> pi(+/-)mu(+/-)mu(+/-)) < 8.6 x 10(-11) at 90{\%} CL. Searches for two-body resonances X in K-+/- -> pi $\mu$$\mu$decays (such as heavy neutral leptons N-4 and inflatons chi) are also presented. In the absence of signals, upper limits are set on the products of branching fractions B(K-+/- -> $\mu$N-+/-(4))B(N-4 -> pi mu) and B(K-+/- ->pi X-+/-)B(X -> mu(+),mu(-)) for ranges of assumed resonance masses and lifetimes. The limits are in the (10(-11),10(-9)) range for resonance lifetimes below 100 ps.",
optnote="WOS:000402342500011",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3169), last updated on Thu, 22 Jun 2017 18:06:44 +0000",
issn="0370-2693",
doi="10.1016/j.physletb.2017.03.029",
opturl="http://arxiv.org/abs/1612.04723",
opturl="https://doi.org/10.1016/j.physletb.2017.03.029",
archivePrefix="arXiv",
eprint="1612.04723",
language="English"
}