NGAMMA: A Monte Carlo generator for multiphoton production in e+e− annihilation

IF 3.4 2区物理与天体物理 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computer Physics Communications Pub Date : 2025-09-03 DOI:10.1016/j.cpc.2025.109826

L.V. Kardapoltsev , N.A. Melnikova

引用次数: 0

Abstract

We present the NGAMMA Monte Carlo event generator for QED processes of

e^{+} e^{-}

annihilation into a multiphoton final state,

e^{+} e^{-} \to N γ (N \geq 2)

. These processes are an important source of background in the study of

e^{+} e^{-} \to

hadrons processes with a multiphoton final state, especially for experiments at low energy

e^{+} e^{-}

colliders like SND, CMD-3, KLOE and for the BESIII experiment. For generation, NGAMMA exploits the exact tree-level amplitude.

Program summary

Program Title: NGAMMA

CPC Library link to program files: https://doi.org/10.17632/rj9ntc7tzn.1

Developer's repository link: https://git.inp.nsk.su/ngamma/ngamma

Licensing provisions: LGPL

Programming language: C++

Nature of problem: The NGAMMA generator was developed to simulate the background for

e^{+} e^{-} \to

hadrons processes with a multiphoton final state coming from the QED processes

e^{+} e^{-} \to N γ (N \geq 2)

Solution method: Events consisting of momenta of the outgoing particles are generated by Monte Carlo methods. The generated events are distributed according to the exact tree-level cross section [1].

References

[1]
R. Kleiss, W.J. Stirling, Phys. Lett. B 179 (1986) 159–163.

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在e+e−湮灭中产生多光子的蒙特卡罗发生器

我们提出了用于e+e−湮灭到多光子最终态e+e−→Nγ(N≥2)的QED过程的NGAMMA蒙特卡罗事件发生器。这些过程是研究具有多光子终态的e+e−→强子过程的重要背景，特别是在SND、CMD-3、KLOE等低能e+e−对撞机上的实验和BESIII实验。对于生成，NGAMMA利用精确的树级振幅。程序摘要程序标题：NGAMMA macpc库链接到程序文件：https://doi.org/10.17632/rj9ntc7tzn.1Developer's存储库链接：https://git.inp.nsk.su/ngamma/ngammaLicensing条款：lgpl编程语言：c++问题性质：NGAMMA生成器被开发用于模拟e+e−→强子过程的背景，该过程具有来自QED过程e+e−→Nγ(N≥2)的多光子最终状态。求解方法：用蒙特卡罗方法生成由出射粒子动量组成的事件。生成的事件根据确切的树级横截面[1]. references [1]R分布。克里斯，W.J.斯特林，物理学。列托人。B 179(1986) 159-163。

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

Computer Physics Communications 物理-计算机：跨学科应用

CiteScore

12.10

自引率

3.20%

发文量

287

审稿时长

5.3 months

期刊介绍： The focus of CPC is on contemporary computational methods and techniques and their implementation, the effectiveness of which will normally be evidenced by the author(s) within the context of a substantive problem in physics. Within this setting CPC publishes two types of paper. Computer Programs in Physics (CPiP) These papers describe significant computer programs to be archived in the CPC Program Library which is held in the Mendeley Data repository. The submitted software must be covered by an approved open source licence. Papers and associated computer programs that address a problem of contemporary interest in physics that cannot be solved by current software are particularly encouraged. Computational Physics Papers (CP) These are research papers in, but are not limited to, the following themes across computational physics and related disciplines. mathematical and numerical methods and algorithms; computational models including those associated with the design, control and analysis of experiments; and algebraic computation. Each will normally include software implementation and performance details. The software implementation should, ideally, be available via GitHub, Zenodo or an institutional repository.In addition, research papers on the impact of advanced computer architecture and special purpose computers on computing in the physical sciences and software topics related to, and of importance in, the physical sciences may be considered.