Equivalence of pion loops in equal-time and light-front dynamics

Journal Article · Tue Sep 01 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.054018· OSTI ID:21322594

Ji, Chueng-Ryong; Melnitchouk, W; Thomas, A W ^[1]

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1. Department of Physics, Box 8202, North Carolina State University, Raleigh, North Carolina 27692-8202 (United States)

We demonstrate the equivalence of the light-front and equal-time formulations of pionic corrections to nucleon properties. As a specific example, we consider the self-energy {sigma} of a nucleon dressed by pion loops, for both pseudovector and pseudoscalar {pi}NN couplings. We derive the leading and next-to-leading nonanalytic behavior of {sigma} on the light front, and show explicitly their equivalence in the rest frame and infinite momentum frame in equal-time quantization, as well as in a manifestly covariant formulation.

• OSTI ID: 21322594
• Journal Information: Physical Review. D, Particles Fields, Vol. 80, Issue 5; Other Information: DOI: 10.1103/PhysRevD.80.054018; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRECTIONS
COUPLING
NUCLEONS
PIONS
QUANTIZATION
SELF-ENERGY