New limit on the strength of mixing between. nu. /sub. mu. / and. nu. /sub e/

Journal Article · Sat Jun 01 04:00:00 EDT 1985 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.31.2732· OSTI ID:5645319

Ahrens, L A; Aronson, S H; Connolly, P L; Gibbard, B G; Murtagh, M J; Murtagh, S; Terada, S; White, D H; Callas, J L; Cutts, D; Hoftun, J S; Lanou, R E; Shinkawa, T; Amako, K; Kabe, S; Nagashima, Y; Suzuki, Y; Tatsumi, S; Abe, K; Beier, E W ; Doughty, D C; Durkin, L S; Heagy, S M; Hurley, M; Mann, A K; Newcomer, F M; Williams, H H; York, T; Hedin, D; Marx, M D; Stern, E

Measurements have been made of the reactions ..nu../sub e/n..-->..e/sup -/p and ..nu../sub ..mu../n..--> mu../sup -/p in a detector located an effective distance of 96 m from a neutrino source. These measurements yield directly the energy-dependent ratio of the neutrino fluxes (Phi(E(..nu../sub e/))/Phi(E(..nu../sub ..mu../)) )/sub obs/ incident on the detector. When combined with an estimate of the flux ratio emanating from the source (Phi(E(..nu../sub e/))/Phi(E(..nu../sub ..mu../)) )/sub calc/, the measured ratio provides an upper limit on the strength of mixing between ..nu../sub ..mu../ and ..nu../sub e/. We obtain sin/sup 2/2..cap alpha..<3.4 x 10/sup -3/ (90% C.L.) in the limit of large mass difference ..delta..m/sup 2/ (equivalentVertical Barm/sub 1/ /sup 2/-m/sub 2/ /sup 2/Vertical Bar) between neutrino mass eigenstates, m/sub 1/ and m/sub 2/; and an upper limit on the product ..delta..m/sup 2/ sin2..cap alpha..<0.43 eV/sup 2/ in the limit of small mass difference.

• Research Organization: Physics Department, Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 5645319
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 31:11; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Weak Interactions &amp; Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANGULAR DISTRIBUTION
BARYONS
BROOKHAVEN AGS
CROSS SECTIONS
CYCLIC ACCELERATORS
DISTRIBUTION
EIGENSTATES
ELECTRON NEUTRINOS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
FERMIONS
HADRONS
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LEPTONS
MASS DIFFERENCE
MASSLESS PARTICLES
MUON NEUTRINOS
MUONS
MUONS MINUS
NEUTRINO-NEUTRON INTERACTIONS
NEUTRINO-NUCLEON INTERACTIONS
NEUTRINOS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PHOTONS
PROTONS
SYNCHROTRONS