抄録
Evidence of a heavy neutrino, νH, in the K+→μ+νH decays was sought using the E949 experimental data with an exposure of 1.70×1012 stopped kaons. With the major background from the radiative K+→μ+νμγ decay understood and suppressed, upper limits (90% C.L.) on the neutrino mixing matrix element between the muon and heavy neutrinos, |UμH|2, were set at the level of 10-7 to 10-9 for the heavy neutrino mass region 175 to 300MeV/c2.
本文言語 | English |
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論文番号 | 052001 |
ジャーナル | Physical Review D - Particles, Fields, Gravitation and Cosmology |
巻 | 91 |
号 | 5 |
DOI | |
出版ステータス | Published - 2015 3月 2 |
外部発表 | はい |
ASJC Scopus subject areas
- 核物理学および高エネルギー物理学
- 物理学および天文学(その他)