Search for heavy neutrinos in K+→μ+νH decays
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 ×1 012 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, |Uμ H|2 , were set at the level of 1 0-7 to 1 0-9 for the heavy neutrino mass region 175 to 300 MeV /c2 .
- Publication:
-
Physical Review D
- Pub Date:
- March 2015
- DOI:
- 10.1103/PhysRevD.91.052001
- arXiv:
- arXiv:1411.3963
- Bibcode:
- 2015PhRvD..91e2001A
- Keywords:
-
- 14.60.St;
- 13.20.Eb;
- Non-standard-model neutrinos right-handed neutrinos etc.;
- Decays of K mesons;
- High Energy Physics - Experiment
- E-Print:
- 14 pages, 13 figures