Pulse envelope effects in nonlinear Breit-Wheeler pair creation

S. Tang; B. King

doi:10.1103/physrevd.104.096019

Pulse envelope effects in nonlinear Breit-Wheeler pair creation

S. Tang
, B. King^*

^*Corresponding author for this work

School of Engineering, Computing and Mathematics

Ocean University of China

Research output: Contribution to journal › Article › peer-review

Abstract

The effect of the pulse envelope on electron-positron pair creation in a circularly polarized laser pulse is
investigated. Interference on the length scale of the pulse envelope, and smoothness of the pulse edges are
found to influence the pair spectrum. A toy model of a flat-top pulse is used to identify pulse envelope
effects inaccessible to local approaches. Broadening of channel openings and a widening of the energy and
transverse momentum distribution of the pair are found to receive contributions that are below the local
harmonic threshold. By comparing pair yields in a flat-top, sine-squared and Gaussian pulse, a link between
pulse shape and photon-polarized Breit-Wheeler pair creation is found. In the transverse momentum
distribution, a signal of pulse envelope interference is found in an azimuthal asymmetry, which appears in
intense fields and persists in long pulses.

Original language	English
Article number	096019
Number of pages	0
Journal	Physical Review D
Volume	104
Issue number	9
Early online date	29 Nov 2021
DOIs	https://doi.org/10.1103/physrevd.104.096019
Publication status	E-pub ahead of print - 29 Nov 2021

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10.1103/physrevd.104.096019

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Pulse envelope effects in nonlinear Breit-Wheeler pair-creation
Tang, S. & King, B., 1 Sept 2021.
Research output: Working paper / Preprint › Preprint

Cite this

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title = "Pulse envelope effects in nonlinear Breit-Wheeler pair creation",

abstract = "The effect of the pulse envelope on electron-positron pair creation in a circularly polarized laser pulse is investigated. Interference on the length scale of the pulse envelope, and smoothness of the pulse edges are found to influence the pair spectrum. A toy model of a flat-top pulse is used to identify pulse envelope effects inaccessible to local approaches. Broadening of channel openings and a widening of the energy and transverse momentum distribution of the pair are found to receive contributions that are below the local harmonic threshold. By comparing pair yields in a flat-top, sine-squared and Gaussian pulse, a link between pulse shape and photon-polarized Breit-Wheeler pair creation is found. In the transverse momentum distribution, a signal of pulse envelope interference is found in an azimuthal asymmetry, which appears in intense fields and persists in long pulses.",

author = "S. Tang and B. King",

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doi = "10.1103/physrevd.104.096019",

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N2 - The effect of the pulse envelope on electron-positron pair creation in a circularly polarized laser pulse is investigated. Interference on the length scale of the pulse envelope, and smoothness of the pulse edges are found to influence the pair spectrum. A toy model of a flat-top pulse is used to identify pulse envelope effects inaccessible to local approaches. Broadening of channel openings and a widening of the energy and transverse momentum distribution of the pair are found to receive contributions that are below the local harmonic threshold. By comparing pair yields in a flat-top, sine-squared and Gaussian pulse, a link between pulse shape and photon-polarized Breit-Wheeler pair creation is found. In the transverse momentum distribution, a signal of pulse envelope interference is found in an azimuthal asymmetry, which appears in intense fields and persists in long pulses.

AB - The effect of the pulse envelope on electron-positron pair creation in a circularly polarized laser pulse is investigated. Interference on the length scale of the pulse envelope, and smoothness of the pulse edges are found to influence the pair spectrum. A toy model of a flat-top pulse is used to identify pulse envelope effects inaccessible to local approaches. Broadening of channel openings and a widening of the energy and transverse momentum distribution of the pair are found to receive contributions that are below the local harmonic threshold. By comparing pair yields in a flat-top, sine-squared and Gaussian pulse, a link between pulse shape and photon-polarized Breit-Wheeler pair creation is found. In the transverse momentum distribution, a signal of pulse envelope interference is found in an azimuthal asymmetry, which appears in intense fields and persists in long pulses.

U2 - 10.1103/physrevd.104.096019

DO - 10.1103/physrevd.104.096019

M3 - Article

SN - 2470-0010

VL - 104

JO - Physical Review D

JF - Physical Review D

IS - 9

M1 - 096019

ER -

Pulse envelope effects in nonlinear Breit-Wheeler pair creation

Abstract

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Pulse envelope effects in nonlinear Breit-Wheeler pair-creation

Cite this