Light-by-light scattering in the presence of magnetic fields

Baier R, Rebhan A, Wödlinger M (2018)
Physical Review D 98(5): 056001.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
Autor*in
Baier, RudolfUniBi; Rebhan, Anton; Wödlinger, Matthias
Abstract / Bemerkung
The low-energy light-by-light cross section as determined by the nonlinear Euler-Heisenberg QED Lagrangian is evaluated in the presence of constant magnetic fields in the center-of-mass system of the colliding photons. This cross section has a complicated dependence on directions and polarizations. The overall magnitude decreases as the magnetic field is increased from zero, but this trend is reversed for ultrastrong magnetic fields B≳Bc, where the cross section eventually grows quadratically with the magnetic field strength perpendicular to the collision axis. This effect is due to interactions involving the lowest Landau level of virtual Dirac particles; it is absent in scalar QED. An even more dramatic effect is found for virtual charged vector mesons where the one-loop cross section diverges at the critical field strength due to an instability of the lowest Landau level and the possibility of the formation of a superconducting vacuum state. We also discuss (the absence of) implications for the recent observation of light-by-light scattering in heavy-ion collisions.
Erscheinungsjahr
2018
Zeitschriftentitel
Physical Review D
Band
98
Ausgabe
5
Art.-Nr.
056001
ISSN
2470-0010
eISSN
2470-0029
Finanzierungs-Informationen
Open Access publishing charge funded by SCOAP$^3$ – Sponsoring Consortium for Open Access Publishing in Particle Physics and Bielefeld University.
Page URI
https://pub.uni-bielefeld.de/record/2931236

Zitieren

Baier R, Rebhan A, Wödlinger M. Light-by-light scattering in the presence of magnetic fields. Physical Review D. 2018;98(5): 056001.
Baier, R., Rebhan, A., & Wödlinger, M. (2018). Light-by-light scattering in the presence of magnetic fields. Physical Review D, 98(5), 056001. https://doi.org/10.1103/PhysRevD.98.056001
Baier, R., Rebhan, A., and Wödlinger, M. (2018). Light-by-light scattering in the presence of magnetic fields. Physical Review D 98:056001.
Baier, R., Rebhan, A., & Wödlinger, M., 2018. Light-by-light scattering in the presence of magnetic fields. Physical Review D, 98(5): 056001.
R. Baier, A. Rebhan, and M. Wödlinger, “Light-by-light scattering in the presence of magnetic fields”, Physical Review D, vol. 98, 2018, : 056001.
Baier, R., Rebhan, A., Wödlinger, M.: Light-by-light scattering in the presence of magnetic fields. Physical Review D. 98, : 056001 (2018).
Baier, Rudolf, Rebhan, Anton, and Wödlinger, Matthias. “Light-by-light scattering in the presence of magnetic fields”. Physical Review D 98.5 (2018): 056001.
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arXiv: 1804.06140

Inspire: 1668147

SCOAP3: 42462

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