Prompt neutrino production in beam-dump experiments

Journal Article · Tue Mar 01 04:00:00 EST 1983 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.27.1080· OSTI ID:6260863

Berger, E L; Clavelli, L; Wright, N R

Purely leptonic decays of the charm D and F mesons are investigated quantitatively as a source of asymmetry between prompt (..nu../sub e/+nu-bar/sub e/) and (..nu../sub ..mu../+nu-bar/sub ..mu../) neutrino rates from hadronic beam dumps. We define and compute the values of two different ratios R of the numbers of events produced in a neutrino detector exposed to prompt ..nu../sub e/'s and ..nu../sub ..mu../'s, applying selections identical to those used in analyses of data. The decay mode F..--> mu nu../sub ..mu../ is shown to depress the ratio R/sub 1/ to values perhaps as low as 0.9; R/sub 1/ is determined from data in which electrons and muons are identified on an event-by-event basis. A ratio R/sub 2/ may be determined if electrons are not identified. Owing to F..-->..tau..nu../sub tau/ , R/sub 2/ is increased above R/sub 1/, and values of R/sub 2/ may exceed unity. Interpreted in this context, values of R substantially below unity, as observed in some experiments, would require very large values for the weak-decay constant f/sub F/ and for the inclusive F-production cross section.

• Research Organization: High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 6260863
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 27:5; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BASIC INTERACTIONS
BEAM DUMPS
BOSONS
CHARM PARTICLES
CHARMED MESON RESONANCES
CROSS SECTIONS
D RESONANCES
DECAY
ELEMENTARY PARTICLES
F-2030 RESONANCES
FERMIONS
HADRONS
INTERACTIONS
LEPTONIC DECAY
LEPTONS
MASSLESS PARTICLES
MESON RESONANCES
MESONS
NEUTRINOS
PARTICLE DECAY
PARTICLE PRODUCTION
POSTULATED PARTICLES
RESONANCE PARTICLES
WEAK INTERACTIONS
WEAK PARTICLE DECAY