Neutrinos from muon-rich ultra high energy electromagnetic cascades: The MUNHECA code

An ultra high energy electromagnetic cascade, a purely leptonic process and initiated by either photons or e^±, can be a source of high energy neutrinos. We present a public python3 code, MUNHECA, to compute the neutrino spectrum by taking into account various QED processes, with the cascade developing either along the propagation in the cosmic microwave background in the high-redshift universe or in a predefined photon background surrounding the astrophysical source. The user can adjust various settings of MUNHECA, including the spectrum of injected high energy photons, the background photon field and the QED processes governing the cascade evolution. We improve the modeling of several processes, provide examples of the execution of MUNHECA and compare it with some earlier and more simplified estimates of the neutrino spectrum from electromagnetic cascades.

本数据集描述了一种超高能电磁级联，一种纯粹的光子过程，由光子或正负电子引发，可能成为高能中微子的来源。我们提供了一款公开的python3代码，名为MUNHECA，通过考虑各种量子电动力学过程，计算中微子能谱。该级联可能沿宇宙微波背景中的传播或在预设的光子背景中发展，该背景围绕天体物理源。用户可调整MUNHECA的各种设置，包括注入的高能光子能谱、背景光子场以及控制级联演化的量子电动力学过程。我们对几个过程进行了改进，提供了MUNHECA的执行示例，并将其与一些早期和更简化的电磁级联中微子能谱估计进行了比较。