Abstract
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.
Original language | English |
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Article number | 052001 |
Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
Volume | 91 |
Issue number | 5 |
DOIs | |
Publication status | Published - Mar 2 2015 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)