Nonresonant semileptonic heavy quark decay

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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 ... continued below

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1182 Kilobytes pages

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Isgur, N. February 1, 1999.

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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.

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1182 Kilobytes pages

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  • Other Information: Submitted to Phys.Rev.; Volume D, No.60 074030; PBD: 1 Feb 1999

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  • Report No.: DOE/ER/40150-1284
  • Report No.: JLAB-THY-99-08
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 753181
  • Archival Resource Key: ark:/67531/metadc709877

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • February 1, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • Feb. 5, 2016, 8:20 p.m.

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Isgur, N. Nonresonant semileptonic heavy quark decay, article, February 1, 1999; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc709877/: accessed June 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.