Charmed particle lifetimes
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.
- Research Organization:
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455
- OSTI ID:
- 5987933
- Report Number(s):
- CONF-7810116-; TRN: 79-016468
- Journal Information:
- AIP (Am. Inst. Phys.) Conf. Proc.; (United States), Vol. 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
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LIFETIME
PROTON-PROTON INTERACTIONS
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BRANCHING RATIO
CROSS SECTIONS
D RESONANCES
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GEV RANGE 100-1000
HEAVY LEPTONS
NUCLEAR EMULSIONS
PARTICLE DECAY
QUARK MODEL
SU-4 GROUPS
BARYON-BARYON INTERACTIONS
BOSONS
CHARMED MESON RESONANCES
COMPOSITE MODELS
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ELEMENTARY PARTICLES
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FERMIONS
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MATHEMATICAL MODELS
MESON RESONANCES
MESONS
NUCLEON-NUCLEON INTERACTIONS
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645204* - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions & Properties