Factorization of low-energy gluons in exclusive processes

Geoffrey T. Bodwin, Xavier Garcia I Tormo, Jungil Lee

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)

    Abstract

    We outline a proof of factorization in exclusive processes, taking into account the presence of soft and collinear modes of arbitrarily low energy, which arise when the external lines of the process are taken on shell. Specifically, we examine the process of e+e- annihilation through a virtual photon into two light mesons. In an intermediate step, we establish a factorized form that contains a soft function that is free of collinear divergences. In contrast, in soft-collinear effective theory, the low-energy collinear modes factor most straightforwardly into the soft function. We point out that the cancellation of the soft function, which relies on the color-singlet nature of the external hadrons, fails when the soft function contains low-energy collinear modes.

    Original languageEnglish
    Article number114005
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume81
    Issue number11
    DOIs
    Publication statusPublished - 2010 Jun 4

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Physics and Astronomy (miscellaneous)

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