Evidence for the decay K+ ---> pi+ neutrino anti-neutrino

Collaboration
Aug, 1997
9 pages
Published in:
  • Phys.Rev.Lett. 79 (1997) 2204-2207
e-Print:
Report number:
  • BNL-64631,
  • KEK-PREPRINT-97-115,
  • PRINCETON-HEP-97-12,
  • TRI-PP-97-28,
  • TRI--PP--97--28
Experiments:

Citations per year

19972004201120182024010203040
Abstract: (arXiv)
An event consistent with the signature expected for the rare kaon decay K+ --> pi+ nu anti-nu has been observed. In the pion momentum region examined, 211<P<230 MeV/c, the backgrounds are estimated to contribute 0.08 +/- 0.03 events. If the event is due to K+ --> pi+ nu anti-nu, the branching ratio is (4.2 +9.7/-3.5) x E-10.
Note:
  • 10 pages, LaTeX, 5 Postscript figures
  • K+: semileptonic decay
  • K+: rare decay
  • K+: branching ratio
  • neutrino: pair production
  • experimental results
  • Brookhaven PS
  • K+ --> pi+ neutrino antineutrino