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    Effective Field Theory approach to heavy quark fragmentation

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    art_3A10.1007_2FJHEP11_282016_ ...
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    Author
    Fickinger, Michael
    Fleming, Sean
    Kim, Chul
    Mereghetti, Emanuele
    Affiliation
    Univ Arizona, Dept Phys
    Issue Date
    2016-11-17
    Keywords
    QCD Phenomenology
    
    Metadata
    Show full item record
    Publisher
    SPRINGER
    Citation
    Effective Field Theory approach to heavy quark fragmentation 2016, 2016 (11) Journal of High Energy Physics
    Journal
    Journal of High Energy Physics
    Rights
    © The Author(s) 2016.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Using an approach based on Soft Collinear Effective Theory (SCET) and Heavy Quark Effective Theory (HQET) we determine the b-quark fragmentation function from electron-positron annihilation data at the Z-boson peak at next-to-next-to leading order with next-to-next-to leading log resummation of DGLAP logarithms, and next-to-next-to next -to leading log resummation of endpoint logarithms. This analysis improves, by one order, the previous extraction of the b-quark fragmentation function. We find that while the addition of the next order in the calculation does not much shift the extracted form of the fragmentation function, it does reduce theoretical errors indicating that the expansion is converging. Using an approach based on effective field theory allows us to systematically control theoretical errors. While the fits of theory to data are generally good, the fits seem to be hinting that higher order correction from HQET may be needed to explain the b-quark fragmentation function at smaller values of momentum fraction.
    Note
    Open Access Journal.
    ISSN
    1029-8479
    DOI
    10.1007/JHEP11(2016)095
    Version
    Final published version
    Additional Links
    http://link.springer.com/10.1007/JHEP11(2016)095
    ae974a485f413a2113503eed53cd6c53
    10.1007/JHEP11(2016)095
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