Smooth mass corrections to massless theories |
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Authors: | B Lampe |
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Institution: | 1. CERN, CH-1211, Geneva 23, Switzerland
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Abstract: | We analyze the transition from massive to massless theories in cases in which mass singularities are present. In massless theories these singularities are absorbed into densities or fragmentation functions. We define a subtraction procedure for massive theories which is a canonical generalization of the “minimal subtraction” in massless theories. We use this procedure to calculate smooth mass corrections to the structure functionsF 2 andG 1 of deep inelastic scattering. In particular we show how, in our scheme, heavy quarks affect the spin of the proton. |
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