Resolution of Ambiguities in Perturbative QCD : How Stevenson's Principle of Minimal Sensitivity Works : Particles and Fields

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概要

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• In the perturbative QCD analyses of the deeply inelastic processes, the coupling constant depends on at least two mass-scales, the renormalization scale and the factorization scale. By integrating the coupled renormalization group equations with respect to these two mass-scales, the running coupling constant is defined. A perturbative approximation then introduces a new ambiguity, the integration-path dependence, into the theory. We show that the problem of this new ambiguity is resolved by imposing Stevenson's principle of minimal sensitivity. Together with the analogous analysis of the operator matrix element or the cut vertex, we can completely solve the problem of getting an unambiguous perturbative QCD prediction.

• 理論物理学刊行会の論文
• 1984-04-25

著者

• Nakkagawa Hisao

  Institute For Natura Science Nara University

• NIEGAWA Akira

  Department of Physics, Faculty Sience Osaka City University

• Niegawa Akira

  Department Of Physics Dalhousie University

• NIEGAWA Akira

  Department of Physics, Dalhousie University

• NIEGAWA Akira

  Department of Physics, Osaka City University:Department of Physics, Dalhousie University

• NAKKAGAWA Hisao

  Institute of Natural Sciences, Nara University

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