In this contribution, we present our recent compact master formulas for the multiphoton amplitudes of a scalar propagator in a constant background field using the worldline fomulation of quantum field theory. The constant field has been included nonperturbatively, which is crucial for strong external fields. A possible application is the scattering of photons by electrons in a strong magnetic field, a process that has been a subject of great interest since the discovery of astrophysical objects like radio pulsars, which provide evidence that magnetic fields of the order of 1012G are present in nature. The presence of a strong external field leads to a strong deviation from the classical scattering amplitudes. We explicitly work out the Compton scattering amplitude in a magnetic field, which is a process of potential relevance for astrophysics. Our final result is compact and suitable for numerical integration.

Multiphoton amplitude in a constant background field / Ahmad, Aftab; Ahmadiniaz, Naser; Corradini, Olindo; Pyo Kim, Sang; Schubert, Christian. - In: EPJ WEB OF CONFERENCES. - ISSN 2101-6275. - 168:(2018), p. 04003. (Intervento presentato al convegno 13th International Conference on Gravitation, Astrophysics, and Cosmology. ICGAC 2017 and the 15th Italian-Korean Joint Symposium on Relativistic Astrophysics, IK 2017 tenutosi a Ewha Womans University, korea nel 2017) [10.1051/epjconf/201816804003].

Multiphoton amplitude in a constant background field

Olindo Corradini;
2018

Abstract

In this contribution, we present our recent compact master formulas for the multiphoton amplitudes of a scalar propagator in a constant background field using the worldline fomulation of quantum field theory. The constant field has been included nonperturbatively, which is crucial for strong external fields. A possible application is the scattering of photons by electrons in a strong magnetic field, a process that has been a subject of great interest since the discovery of astrophysical objects like radio pulsars, which provide evidence that magnetic fields of the order of 1012G are present in nature. The presence of a strong external field leads to a strong deviation from the classical scattering amplitudes. We explicitly work out the Compton scattering amplitude in a magnetic field, which is a process of potential relevance for astrophysics. Our final result is compact and suitable for numerical integration.
2018
13th International Conference on Gravitation, Astrophysics, and Cosmology. ICGAC 2017 and the 15th Italian-Korean Joint Symposium on Relativistic Astrophysics, IK 2017
Ewha Womans University, korea
2017
168
04003
Ahmad, Aftab; Ahmadiniaz, Naser; Corradini, Olindo; Pyo Kim, Sang; Schubert, Christian
Multiphoton amplitude in a constant background field / Ahmad, Aftab; Ahmadiniaz, Naser; Corradini, Olindo; Pyo Kim, Sang; Schubert, Christian. - In: EPJ WEB OF CONFERENCES. - ISSN 2101-6275. - 168:(2018), p. 04003. (Intervento presentato al convegno 13th International Conference on Gravitation, Astrophysics, and Cosmology. ICGAC 2017 and the 15th Italian-Korean Joint Symposium on Relativistic Astrophysics, IK 2017 tenutosi a Ewha Womans University, korea nel 2017) [10.1051/epjconf/201816804003].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1166781
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