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  • World Scientific Pub Co Pte Ltd  (2)
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  • World Scientific Pub Co Pte Ltd  (2)
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  • 1
    Online Resource
    Online Resource
    PION QUARK STRUCTURE IN QCD
    World Scientific Pub Co Pte Ltd ; 2007
    In:  International Journal of Modern Physics A Vol. 22, No. 02n03 ( 2007-01-30), p. 654-658
    Details
    In: International Journal of Modern Physics A, World Scientific Pub Co Pte Ltd, Vol. 22, No. 02n03 ( 2007-01-30), p. 654-658
    Abstract: We describe the present status of the pion distribution amplitude as it originated from two sources: (i) a nonperturbative approach, based on QCD sum rules with nonlocal condensates and (ii) a NLO QCD analysis of the CLEO data on F γγ * π (Q 2 ), supplemented by the recent high-precision lattice calculations of the second moment of the pion distribution amplitude.
    Type of Medium: Online Resource
    ISSN: 0217-751X , 1793-656X
    URL: Article
    DOI: 10.1142/S0217751X07036051
    RVK:
    UA 4381
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2007
    SSG: 16,12
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  • 2
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    PION FORM FACTOR IN QCD SUM RULES WITH NONLOCAL CONDENSATES AND IN THE LOCAL-DUALITY APPROACH
    World Scientific Pub Co Pte Ltd ; 2009
    In:  Modern Physics Letters A Vol. 24, No. 35n37 ( 2009-12-07), p. 2848-2857
    Details
    In: Modern Physics Letters A, World Scientific Pub Co Pte Ltd, Vol. 24, No. 35n37 ( 2009-12-07), p. 2848-2857
    Abstract: We discuss the QCD sum-rule approach for the spacelike electromagnetic pion form factor in the O(α s ) approximation. We show that the nonlocality of the condensates is a key point to include nonperturbative contributions to the pion form factor. We compare our results with the Local-Duality predictions and show that the continuum threshold s 0 (Q 2 ) parameter is highly underestimated in the Local-Duality approach at Q 2 ≳ 2 GeV 2 . Using our fit for this parameter, [Formula: see text] and applying the fractional analytic perturbation theory, we estimate with an accuracy of the order of 1% the [Formula: see text] contribution to the pion's form factor.
    Type of Medium: Online Resource
    ISSN: 0217-7323 , 1793-6632
    URL: Article
    DOI: 10.1142/S0217732309001066
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2009
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