Electron-positron pair creation under Gaussian and super-Gaussian pulse trains

IF 4.2 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

The European Physical Journal C Pub Date : 2024-10-28 DOI:10.1140/epjc/s10052-024-13453-7

X. X. Zhou, X. N. Cao, C. K. Li, N. S. Lin, Y. J. Li

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Abstract

The electron-positron pair (EPP) creation under Gaussian and super-Gaussian pulse trains are studied by the computational quantum field theory (CQFT) in the single-photon regime. The details of the EPP creation are studied from the time evolution of the EPP number, energy spectra and spatial distribution of the electrons. The results indicate that the final created EPPs is the non-linear accumulation of the multi-pulses, which depends on the time interval, pulse shape and pulse number. The optimal time interval can be chosen based on the pulse resonance condition, which is derived by the perturbation method. Besides, steeper super-Gaussian pulses and adding more pulses facilitate the EPP creation as well. The results indicate that, under optimal multi-pulse parameters, the number of the EPPs obtained is much larger than the sum of the EPPs created under the same number of single pulses. This finding not only can enhance the EPP creation, but also can improve the multi-pulse utilization and guide future experimental research on the EPP creation.

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高斯和超高斯脉冲序列下的电子-正电子对生成

计算量子场论（CQFT）在单光子机制下研究了高斯和超高斯脉冲序列下的电子-正电子对（EPP）产生。从 EPP 数量的时间演化、电子的能量谱和空间分布等方面研究了 EPP 生成的细节。结果表明，最终产生的 EPPs 是多脉冲的非线性累积，取决于时间间隔、脉冲形状和脉冲数。最佳时间间隔可以根据脉冲共振条件来选择，而脉冲共振条件是通过扰动法推导出来的。此外，更陡峭的超高斯脉冲和增加更多脉冲也有助于产生 EPP。结果表明，在最佳多脉冲参数下，获得的 EPPs 数量远大于相同数量单脉冲下产生的 EPPs 之和。这一发现不仅能提高 EPP 的生成，还能提高多脉冲的利用率，并指导未来的 EPP 生成实验研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

期刊介绍： Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.