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Title: Charmed particle lifetimes

Abstract

Conventional estimates are reviewed for charmed particle lifetimes. Free-quark models give values of (a few) x 10/sup -13/ sec to (a few) x 10/sup -12/ sec. The shorter of these values also follows from an extrapolation based on D..-->.. Ke..nu... Possible differences among the lifetimes and production rates of D/sup 0/, D/sup +/, F/sup +/, C/sub 0//sup +/, the heavy lepton tau, and the fifth quark b are discussed. Extreme values of mixing angles in a six-quark model could extend charmed particle lifetimes by a factor of at most three from the above estimates, while shorter lifetimes than those predicted could occur for some species like D/sup 0/ or F/sup +/ if their nonleptonic decays were enchanced. The predictions are discussed in the light of some current experimental results, and it is estimated that sigma (pp..-->..charm) approx. =10..mu..b at 400 GeV/c.

Authors:
Publication Date:
Research Org.:
School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455
OSTI Identifier:
5987933
Report Number(s):
CONF-7810116-
Journal ID: CODEN: APCPC; TRN: 79-016468
Resource Type:
Conference
Journal Name:
AIP (Am. Inst. Phys.) Conf. Proc.; (United States)
Additional Journal Information:
Journal Volume: 49; Conference: Bartol conference on cosmic rays and particle physics above 10 TeV, Newark, DE, USA, 16 Oct 1978
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHARM PARTICLES; LIFETIME; PROTON-PROTON INTERACTIONS; PARTICLE PRODUCTION; BRANCHING RATIO; CROSS SECTIONS; D RESONANCES; ENERGY SPECTRA; GEV RANGE 100-1000; HEAVY LEPTONS; NUCLEAR EMULSIONS; PARTICLE DECAY; QUARK MODEL; SU-4 GROUPS; BARYON-BARYON INTERACTIONS; BOSONS; CHARMED MESON RESONANCES; COMPOSITE MODELS; DECAY; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRON-HADRON INTERACTIONS; HADRONS; INTERACTIONS; LEPTONS; LIE GROUPS; MATHEMATICAL MODELS; MESON RESONANCES; MESONS; NUCLEON-NUCLEON INTERACTIONS; PARTICLE INTERACTIONS; PARTICLE MODELS; POSTULATED PARTICLES; PROTON-NUCLEON INTERACTIONS; RESONANCE PARTICLES; SPECTRA; SU GROUPS; SYMMETRY GROUPS; 645204* - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions & Properties

Citation Formats

Rosner, J L. Charmed particle lifetimes. United States: N. p., 1979. Web.
Rosner, J L. Charmed particle lifetimes. United States.
Rosner, J L. Sun . "Charmed particle lifetimes". United States.
@article{osti_5987933,
title = {Charmed particle lifetimes},
author = {Rosner, J L},
abstractNote = {Conventional estimates are reviewed for charmed particle lifetimes. Free-quark models give values of (a few) x 10/sup -13/ sec to (a few) x 10/sup -12/ sec. The shorter of these values also follows from an extrapolation based on D..-->.. Ke..nu... Possible differences among the lifetimes and production rates of D/sup 0/, D/sup +/, F/sup +/, C/sub 0//sup +/, the heavy lepton tau, and the fifth quark b are discussed. Extreme values of mixing angles in a six-quark model could extend charmed particle lifetimes by a factor of at most three from the above estimates, while shorter lifetimes than those predicted could occur for some species like D/sup 0/ or F/sup +/ if their nonleptonic decays were enchanced. The predictions are discussed in the light of some current experimental results, and it is estimated that sigma (pp..-->..charm) approx. =10..mu..b at 400 GeV/c.},
doi = {},
url = {https://www.osti.gov/biblio/5987933}, journal = {AIP (Am. Inst. Phys.) Conf. Proc.; (United States)},
number = ,
volume = 49,
place = {United States},
year = {1979},
month = {4}
}

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