Mass and infrared regularization in a nonlightlike axial gauge | Zendy

B. Humpert | Zendy; W.L. van Neerven | Zendy

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Mass and infrared regularization in a nonlightlike axial gauge

Author(s) -

B. Humpert,

W.L. van Neerven

Publication year - 1981

Publication title -

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Language(s) - English

Resource type - Journals

eISSN - 1089-4918

pISSN - 0556-2821

DOI - 10.1103/physrevd.24.2245

Subject(s) - physics , dimensional regularization , gauge theory , infrared , gravitational singularity , unitarity , regularization (linguistics) , asymptotic freedom , parton , particle physics , sum rule in quantum mechanics , renormalization , quantum electrodynamics , theoretical physics , mathematical physics , quantum chromodynamics , quantum mechanics , artificial intelligence , computer science

(n +0) axial gauge. Our study tests the compatibility of the principal-value prescription with basic field-theory principles (unitarity, analyticity, and gauge invariance), and it confirms the validity of the known on/off-shell mass and infrared regularization techniques, provided the double-cut rule is followed. By focusing on the nonlogarithm terms, we go beyond all earlier such studies and indeed analyze the most sensitive contributions. Our results give explicit insight into the gauge dependence of the mass and infrared singularities and exhibit their cancellation mechanisms. A suitable choice of n ' permits the determination of the nonlogarithm asymptotic-freedom corrections in the DY process. We explain how the arising technical difficulties are resolved.

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