Published January 28, 2002 | Version v1
Journal article Metadata-only

Further evidence for the decay K+ →π+νν-bar

Creators

  • 1. Brookhaven National Laboratory, Upton, New York 11973 (United States)
  • 2. Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (United States)
  • 3. Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T 1Z1 (Canada)
  • 4. TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 (Canada)

Description

Additional evidence for the rare kaon decay K+→π+νν-bar has been found in a new data set with comparable sensitivity to the previously reported result. One new event was observed in the pion momentum region examined, 211<P<229 MeV/c , bringing the total for the combined data set to two. Including all data taken, the backgrounds were estimated to contribute 0.15±0.05 events. The branching ratio is B(K+→π+ν ν-bar)=1.57+1.75-0.82x10-10

Additional details

Identifiers

DOI
10.1103/PhysRevLett.88.041803;
arXiv
arXiv:hep-ex/0111091v2;

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
88
Journal Issue
4
Journal Page Range
p. 041803-041803.4
ISSN
0031-9007
CODEN
PRLTAO

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
35019353
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
ANTINEUTRINOS; BRANCHING RATIO; KAONS PLUS; KOBAYASHI-MASKAWA MATRIX; NEUTRINOS; PARTICLE DECAY; PARTICLE PRODUCTION; PIONS PLUS; QUARK MODEL
Descriptors DEC
ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; BOSONS; COMPOSITE MODELS; DECAY; ELEMENTARY PARTICLES; FERMIONS; HADRONS; KAONS; LEPTONS; MASSLESS PARTICLES; MATHEMATICAL MODELS; MATRICES; MATTER; MESONS; NEUTRINOS; PARTICLE MODELS; PIONS; PSEUDOSCALAR MESONS; STRANGE MESONS; STRANGE PARTICLES

Optional Information

Contract/Grant/Project number
Contract AC02-98CH10886; FG02-91ER40671; W-7405-ENG-36
Notes
(c) 2002 The American Physical Society
Collaborations
E787 Collaboration