Trident pair production in a constant crossed field

King, B.; Rühl, H.

doi:10.1103/physrevd.88.013005

Cited by 89 publications

(145 citation statements)

References 42 publications

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“…Since the complicated phase in the exchange interference terms depends nonlinearly on these outgoing momentum integrations parallel to the field, it was argued in Ref. [37], that the contribution is subleading and can be neglected. In Ref.…”

Section: B Previously Proposed Justification For Neglecting Exchangementioning

confidence: 99%

“…(31) of Ref. [37] of "zero-step" behavior]. (That the probability is proportional to a divergent phase factor will later be recast as a rate per unit formation length.)…”

Section: Justification For Including Exchange Interference In a Ccfmentioning

confidence: 99%

“…[49]), first by Baier, Katkov and Strakhovenko [5] and Ritus [6] by cutting the two-loop diagram in Fig. 3(a), as well as more recently in a direct calculation [37]. However, a second, two-loop diagram must also be cut in order that the exchange and step-exchange interference terms are included, shown in Fig.…”

Section: Introduction and Definitionsmentioning

confidence: 99%

“…Unless the seed electron's energy was very high, the "step interference" occurring in calculating the probability of a single diagram between the purely one-step and two-step processes, had the consequence that the one-step process was suppressed [37]. However, recent calculations of the full process in a plane-wave pulse indicate that this step interference, can, in some parameter regime, be negligible [47].…”

mentioning

confidence: 99%

“…The need for clarification of this point in a CCF background motivates the present study. Until now, the reason given for explicitly neglecting this exchange interference is the appearance of a rapidly oscillating phase occurring at the level of the probability, which is absent in the probability of just a single diagram [37,48]. (We mention a recent analysis of the total trident process in a plane-wave background that appeared during preparation of this work, which discusses the locally constant field limit [49].)…”

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confidence: 99%

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Effect of interference on the trident process in a constant crossed field

King

Fedotov

2018

Phys. Rev. D

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We perform a complete calculation of electron-seeded pair creation (the trident process) in a constant crossed electromagnetic background. Unlike earlier treatments, we include the interference between exchange diagrams. We find that this exchange interference can be written as a contribution solely to the one-step process, and for small quantum nonlinearity parameter is of the same order as other one-step terms. We find that the exchange interference further suppresses the one-step process in this parameter regime. Our findings further support the crucial assumption made in laser-plasma simulation codes that at high intensities, the trident process can be well approximated by the repeated iteration of the single-vertex subprocesses. The applicability of this assumption to higher-vertex processes has fundamental importance to the development of simulation capabilities. DOI: 10.1103/PhysRevD.98.016005 When an electron propagates in an intense electromagnetic (EM) field, there is a finite probability that the radiation it produces will decay into an electron-positron pair. If the EM field is weak, in that the effect is perturbative in the charge-field interaction, it corresponds to the linear Breit-Wheeler process [1], where one photon from the background collides with the photon radiated by the electron to produce a pair. Although important in astrophysical contexts [2,3], this linear process has still to be measured in a terrestrial experiment [4]. If the laser pulse intensity is strong, in that all orders of the charge-field interaction must be included in calculations, the photon decay into a pair corresponds to the nonlinear BreitWheeler process. A quarter of a century after electronseeded pair creation was first calculated theoretically in constant magnetic [5] and crossed [6] backgrounds, the combination of nonlinear Compton scattering followed by the nonlinear Breit-Wheeler process was measured in the landmark E144 experiment performed at the Stanford Linear Accelerator Center (SLAC) [7,8]. The importance of this experiment to the laser strong-field QED community can be understood in light of continued interpretation and analysis of the E144 results in the literature [9][10][11].In addition to also having astrophysical importance, a measurement of electron-seeded pair creation in a terrestrial laser-particle collision would allow the study of nonperturbative quantum field theory. As the intensity of the laser pulse increases, for a fixed frequency and seed particle energy, the process moves from the perturbative, to the multiphoton and finally to a tunneling regime [9], in which dependency on the charge-field coupling takes a nonperturbative form.To aid experimental design and analysis, there is an interest in including electron-seeded pair creation in traditional plasma particle-in-cell (PIC) code, using Monte Carlo techniques. Lowest-order processes such as nonlinear Compton scattering [12,13] and photon-seeded pair creation [14][15][16] are included in various simulation codes [17][18][19] and their ...

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Section: B Previously Proposed Justification For Neglecting Exchangementioning

confidence: 99%

“…(31) of Ref. [37] of "zero-step" behavior]. (That the probability is proportional to a divergent phase factor will later be recast as a rate per unit formation length.)…”

Section: Justification For Including Exchange Interference In a Ccfmentioning

confidence: 99%

Section: Introduction and Definitionsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Effect of interference on the trident process in a constant crossed field

King

Fedotov

2018

Phys. Rev. D

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Diagnostic of Peak Laser Intensity by Electron and Positron Production from Laser Plasma

Andreev¹,

Chen

Lécz

2021

Springer Series in Chemical Physics

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The analytic structure of amplitudes on backgrounds from gauge invariance and the infra-red

Ilderton

MacLeod

2020

J. High Energ. Phys.

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Gauge invariance and soft limits can be enough to determine the analytic structure of scattering amplitudes in certain theories. This prompts the question of how gauge invariance is connected to analytic structure in more general theories. Here we focus on QED in background plane waves. We show that imposing gauge invariance introduces new virtuality poles into internal momenta on which amplitudes factorise into a series of terms. Each term is gauge invariant, has a different analytic structure in external momenta, and exhibits a hard/soft factorisation. The introduced poles are dictated by infra-red behaviour, which allows us to extend our results to scalar Yukawa theory. The background is treated non-perturbatively throughout.in which D is the tensor structure of the photon propagator in some gauge, v is the

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Trident pair production in a constant crossed field

Cited by 89 publications

References 42 publications

Effect of interference on the trident process in a constant crossed field

Effect of interference on the trident process in a constant crossed field

Diagnostic of Peak Laser Intensity by Electron and Positron Production from Laser Plasma

The analytic structure of amplitudes on backgrounds from gauge invariance and the infra-red

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