Forward scattering amplitudes and the thermal operator representation

Journal Article · Fri Dec 15 00:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.125005· OSTI ID:20871502

Brandt, F T; Frenkel, J ^[1]; Das, Ashok ^[2]; Perez, Silvana ^[3]

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1. Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo (Brazil)
2. Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627-0171 (United States)
3. Departamento de Fisica, Universidade Federal do Para, Belem, Para 66075-110 (Brazil)

We develop systematically to all orders the forward scattering description for retarded amplitudes in field theories at zero temperature. Subsequently, through the application of the thermal operator, we establish the forward scattering description at finite temperature. We argue that, beyond providing a graphical relation between the zero temperature and the finite temperature amplitudes, this method is calculationally quite useful. As an example, we derive the important features of the one-loop retarded gluon self-energy in the hard thermal loop approximation from the corresponding properties of the zero temperature amplitude.

• OSTI ID: 20871502
• Journal Information: Physical Review. D, Particles Fields, Vol. 74, Issue 12; Other Information: DOI: 10.1103/PhysRevD.74.125005; (c) 2006 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
APPROXIMATIONS
FIELD OPERATORS
GLUONS
QUANTUM FIELD THEORY
SCATTERING
SCATTERING AMPLITUDES
SELF-ENERGY