Iv. Théorie / Theorythe Equivalent Photon Approximation in One- And Two-Photon Exchange Processes

Kessler, P.

doi:10.1051/jphyscol:1974213

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…On the other hand, the integrated cross section depends only on energetic factors, and can then be computed once and for all for given photon beams energy distributions f 1 and f 2 . This quantity, defined the same way as cross sections involving virtual photons under the equivalent photon method [14,18], is a scalar taking into account all the γ energy couplings ponderated by the pair production probability (modelised by the two photons LBW cross section σ γγ ). The computation of σ int γγ for various input photon EDF can then be of great help to compare their relative efficiency for the application of LBW pair production.…”

Section: Principlementioning

confidence: 99%

“…From a theoretical perspective, these processes are linked to real photon pair production because under some particular conditions constituting the equivalent photon approximation [14,18] (also called Williams-Weiszacker approximation), virtual photons can be treated as real ones, allowing to use the LBW cross section to compute the virtual photon pair production probability [19].…”

Section: Introductionmentioning

confidence: 99%

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Electron-positron pair production in the collision of real photon beams with wide energy distributions

Esnault

d’Humières

Arefiev

et al. 2021

Plasma Phys. Control. Fusion

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The creation of an electron–positron pair in the collision of two real photons, namely the linear Breit–Wheeler process, has never been detected directly in the laboratory since its prediction in 1934 despite its fundamental importance in quantum electrodynamics and high energy astrophysics. In the last few years, several experimental setup have been proposed to observe this process in the laboratory, relying either on thermal radiation, Bremsstrahlung, linear or multiphoton inverse Compton scattering photons sources created by lasers or by the mean of a lepton collider coupled with lasers. In these propositions, the influence of the photons’ energy distribution on the total number of produced pairs has been taken into account with an analytical model only for two of these cases. We hereafter develop a general and original, semi-analytical model to estimate the influence of the photons energy distribution on the total number of pairs produced by the collision of two such photon beams, and give optimum energy parameters for some of the proposed experimental configurations. Our results shows that the production of optimum Bremsstrahlung and linear inverse Compton sources are, only from energy distribution considerations, already reachable in today’s facilities. Despite its less interesting energy distribution features for the linear Breit–Wheeler pair production, the photon sources generated via multiphoton inverse Compton scattering by the propagation of a laser in a micro-channel can also be interesting, thank to the high collision luminosity that could eventually be reached by such configurations. These results then gives important insights for the design of experiments intended to detect linear Breit–Wheeler produced positrons in the laboratory for the first time.

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Section: Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electron-positron pair production in the collision of real photon beams with wide energy distributions

Esnault

d’Humières

Arefiev

et al. 2021

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

show abstract

“…These virtual photon collision processes have already been widely investigated [14,15] but are still of great interest nowadays [16,17]. From a theoretical perspective, these processes are linked to real photon pair production because under some particular conditions constituting the equivalent photon approximation [14,18] (also called Williams-Weiszacker approximation), virtual photons can be treated as real ones, allowing to use the LBW cross section to compute the virtual photon pair production probability [19].…”

Section: Introductionmentioning

confidence: 99%

Electron-positron pair production in the collision of real photon beams with wide energy distributions

Esnault,

d'Humières,

Arefiev

et al. 2021

Preprint

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The creation of an electron-positron pair in the collision of two real photons, namely the linear Breit-Wheeler process, has never been detected directly in the laboratory since its prediction in 1934 despite its fundamental importance in quantum electrodynamics and astrophysics. In the last few years, several experimental setup have been proposed to observe this process in the laboratory, relying either on thermal radiation, Bremsstrahlung, linear or multiphoton inverse Compton scattering photons sources created by lasers or by the mean of a lepton collider coupled with lasers. In these propositions, the influence of the photons' energy distribution on the total number of produced pairs has been taken into account with an analytical model only for two of these cases. We hereafter develop a general and original, semi-analytical model to estimate the influence of the photons energy distribution on the total number of pairs produced by the collision of two such photon beams, and give optimum energy parameters for some of the proposed experimental configurations. Our results shows that the production of optimum Bremsstrahlung and linear inverse Compton sources are, only from energy distribution considerations, already reachable in today's facilities. Despite its less interesting energy distribution features for the LBW pair production, the photon sources generated via multiphoton inverse Compton scattering by the propagation of a laser in a micro-channel can also be interesting, thank to the high collision luminosity that could eventually be reached by such configurations. These results then gives important insights for the design of experiments intended to detect linear Breit-Wheeler produced positrons in the laboratory for the first time.

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Phenomenology of double deeply virtual Compton scattering in the era of new experiments

Martínez-Fernández

Pire

et al. 2023

Phys. Rev. D

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Iv. Théorie / Theorythe Equivalent Photon Approximation in One- And Two-Photon Exchange Processes

Cited by 3 publications

References 14 publications

Electron-positron pair production in the collision of real photon beams with wide energy distributions

Electron-positron pair production in the collision of real photon beams with wide energy distributions

Electron-positron pair production in the collision of real photon beams with wide energy distributions

Phenomenology of double deeply virtual Compton scattering in the era of new experiments

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