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New Perspectives for QCD: The Novel Effects of Final-State Interactions and Near-Conformal Effective Couplings | | S. J. Brodsky
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25 Oct 2003 | | Journal: | Fizika B13 (2004) 91-114 | | Subject: | hep-ph | | Abstract: | The effective QCD charge extracted from $ au$ decay is remarkably constant at small momenta, implying the near-conformal behavior of hadronic interactions at small momentum transfer. The correspondence of large-$N_C$ supergravity theory in higher-dimensional anti-de Sitter spaces with gauge theory in physical space-time also has interesting implications for hadron phenomenology in the conformal limit, such as constituent counting rules for hard exclusive processes. The utility of light-front quantization and light-front Fock wavefunctions for analyzing such phenomena and representing the dynamics of QCD bound states is reviewed. I also discuss the novel effects of initial- and final-state interactions in hard QCD inclusive processes, including Bjorken scaling single-spin asymmetries and the leading-twist diffractive and shadowing contributions to deep inelastic lepton-proton scattering. | | Source: | arXiv, hep-ph/0310289 | | Services: | Forum | Review | PDF | Favorites | |
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