Light cone expansion and four point function
نویسندگان
چکیده
منابع مشابه
The Pole Part of the 1PI Four-Point Function in Light-Cone Gauge Yang-Mills Theory
The complete UV-divergent contribution to the one-loop 1PI four-point function of Yang-Mills theory in the light-cone gauge is computed in this paper. The formidable UV-divergent contributions arising from each fourpoint Feynman diagram yield a succinct final result which contains nonlocal terms as expected. These nonlocal contributions are consistent with gauge symmetry, and correspond to a no...
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We present the results of our recent systematic study of the light-cone expansion of heavy-to-light transition form factors in a model with scalar constituents [1]. We show that the higher-twist contributions (represented in this model by off-light-cone effects) all have the same behaviour in the 1/mQ expansion. The suppression parameter of the higher-twist contributions compared to the lower-t...
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The Dirac sea is calculated in an expansion around the light cone. The method is to analyze the perturbation expansion for the Dirac sea in position space. This leads to integrals over expressions containing distributions which are singular on the light cone. We derive asymptotic formulas for these “light cone integrals” in terms of line integrals over the external potential and its partial der...
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We study the Dirac sea in the presence of external chiral and scalar/pseudoscalar potentials. In preparation, a method is developed for calculating the advanced and retarded Green's functions in an expansion around the light cone. For this, we rst expand all Feynman diagrams and then explicitly sum up the perturbation series. The light-cone expansion expresses the Green's functions as an innnit...
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A fundamental question in QCD is the non-perturbative structure of hadrons at the amplitude level|not just the single-particle avor, momentum, and helicity distributions of the quark constituents, but also the multi-quark, gluonic, and hiddencolor correlations intrinsic to hadronic and nuclear wavefunctions. The light-cone Fock-state representation of QCD encodes the properties of a hadrons in ...
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ژورنال
عنوان ژورنال: Communications in Mathematical Physics
سال: 1973
ISSN: 0010-3616,1432-0916
DOI: 10.1007/bf01667921