Deep inelastic scattering as x -> 1 using soft-collinear effective theory

Abstract

Soft-collinear effective theory (SCET) is used to sum Sudakov double-logarithms in the x ->1 endpoint region for the deep inelastic scattering structure function. The calculations are done in both the target rest frame and the Breit frame. The separation of scales in the effective theory implies that the anomalous dimension of the SCET current is linear in ln mu, and the anomalous dimension for the Nth moment of the structure function is linear in ln N, to all orders in perturbation theory. The SCET formulation is shown to be free of Landau pole singularities. Some important differences between the deep inelastic structure function and the shape function in B decay are discussed.

19 pages, minor typos fixed, and a comment added on the longitudinal structure function

References in corpus (2)

• Resumming the color-octet contribution to e+ e- -> J/psi + X
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