QCD in heavy quark production and decay
- Univ. of Illinois, Urbana, IL (United States)
The author discusses how QCD is used to understand the physics of heavy quark production and decay dynamics. His discussion of production dynamics primarily concentrates on charm photoproduction data which are compared to perturbative QCD calculations which incorporate fragmentation effects. He begins his discussion of heavy quark decay by reviewing data on charm and beauty lifetimes. Present data on fully leptonic and semileptonic charm decay are then reviewed. Measurements of the hadronic weak current form factors are compared to the nonperturbative QCD-based predictions of Lattice Gauge Theories. He next discusses polarization phenomena present in charmed baryon decay. Heavy Quark Effective Theory predicts that the daughter baryon will recoil from the charmed parent with nearly 100% left-handed polarization, which is in excellent agreement with present data. He concludes by discussing nonleptonic charm decay which is traditionally analyzed in a factorization framework applicable to two-body and quasi-two-body nonleptonic decays. This discussion emphasizes the important role of final state interactions in influencing both the observed decay width of various two-body final states as well as modifying the interference between interfering resonance channels which contribute to specific multibody decays. 50 refs., 77 figs.
- Research Organization:
- Stanford Univ., Stanford Linear Accelerator Center, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-91ER40677
- OSTI ID:
- 330646
- Report Number(s):
- SLAC-R-508; CONF-9608101-PROC.; ON: DE98059286; TRN: 99:005101
- Resource Relation:
- Conference: 24. SLAC Summer Institute on Particle Physics: the strong interaction, from hadrons to protons, Stanford, CA (United States), 19-30 Aug 1996; Other Information: PBD: Jun 1997; Related Information: Is Part Of Proceedings of the 24. SLAC summer institute on particle physics: The strong interaction, from hadrons to partons; Chan, J.; DePorcel, L.; Dixon, L. [eds.]; PB: 649 p.
- Country of Publication:
- United States
- Language:
- English
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