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QCD sum rules in exclusive kinematics and pion wave function

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Zeitschrift für Physik C Particles and Fields

Abstract

We suggest a modification of the QCD sum rules for three-point correlation functions that relates hadron expectation values of an operator of interest to properties of the QCD vacuum in alternating external fields. A new sum rule is obtained for the nucleon magnetic moments. Relations are found between the couplings gπNN , gρωπ and the value of the pion wave function at the point with equal momentum carried by the quark and the antiquark. Our results seem to exclude the possibility of having a pronounced dip in the pion wave function in the middle point, as has been assumed on the evidence of a large value of the second moment.

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Authors and Affiliations

  1. Leningrad Nuclear Physics Institute, Gatchina, SU-188350, Leningrad, USSR

    V. M. Braun & I. E. Filyanov

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  1. V. M. Braun
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  2. I. E. Filyanov
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Braun, V.M., Filyanov, I.E. QCD sum rules in exclusive kinematics and pion wave function. Z. Phys. C - Particles and Fields 44, 157–166 (1989). https://doi.org/10.1007/BF01548594

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  • DOI: https://doi.org/10.1007/BF01548594

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