Nonresonant semileptonic heavy quark decay
In both the large N{sub c} limit and the valence quark model, semileptonic heavy quark decays are dominated by resonant final states. Using Bjorken's sum rule in an ``unquenched'' version of the quark model, the author demonstrates that nonresonant final states should also be produced at a significant rate in the heavy quark limit. By calculating the individual strengths of a large number of exclusive two-body nonresonant channels, he shows that the total rate for such processes is highly fragmented. He also describes some very substantial duality-violating suppression factors which reduce the inclusive nonresonant rate to a few percent of the total semileptonic rate for the finite quark masses of {anti B} decay, and comment on the importance of nonresonant decays as testing grounds for very basic ideas on the structure, strength, and significance of the q{anti q} sea and on quark-hadron duality in QCD.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 753181
- Report Number(s):
- DOE/ER/40150-1284; JLAB-THY-99-08
- Country of Publication:
- United States
- Language:
- English
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