arXiv 2402.145702024-02hep-phnucl-exnucl-th

Super Rosenbluth 实验中的辐射修正

Radiative Corrections in Super Rosenbluth Experiments

Quinn Stefan, Axel Schmidt

备注：: 15 pages, 6 figures (10 total panels)

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AI总结：

本文通过 Monte Carlo 模拟对比了 Super Rosenbluth 与传统实验的辐射修正，发现峰值近似虽能降低运动学依赖，但动量转移趋零时的质子轫致辐射增强使复杂模型数值不稳定，亟需更稳健的修正方法。

摘要：

Super Rosenbluth 实验是弹性电子-质子散射实验，它摒弃了传统的电子探测，转而选择探测反冲质子，具有多项实验优势。其声称的一个优势是辐射修正更有利，即修正更小且运动学依赖性更低。本文通过使用不同的辐射效应模型，对 Super Rosenbluth 和传统 Rosenbluth 实验进行 Monte Carlo 模拟，探讨了这一主张。当使用采用峰值近似的模型时，我们确实证实了辐射修正的运动学依赖性有所降低。然而，我们发现避免使用峰值近似的更复杂模型无法产生数值稳定的结果，这是由于当动量转移 $Q^2$ 趋近于零时，质子轫致辐射的截面会出现大幅增强。由于这种增强在峰值近似中未被建模，因此 Super Rosenbluth 实验需要一种更稳健的辐射修正方法。

英文摘要：

Super Rosenbluth experiments, elastic electron-proton scattering experiments that eschew traditional electron detection and opt instead for the detection of the recoiling proton, have several experimental advantages. One claimed advantage is that radiative corrections are more favorable, i.e., smaller and with less kinematic dependence. In this paper, we explore this claim by conducting Monte Carlo simulations of both Super Rosenbluth and traditional Rosenbluth experiments with different models of radiative effects. When using a model that employs the peaking approximation, we indeed confirm the reduced kinematic dependence of the radiative corrections. However, we find that more sophisticated models that avoid the peaking approximation are unable to produce numerically stable results, due to a large enhancement to the cross section for bremsstrahlung radiation from the proton when the momentum transfer, $Q^2$, approaches zero. Since this enhancement is not modelled in the peaking approximation, a more robust approach to radiative corrections in Super Rosenbluth experiments is needed.

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