重新思考搜索特征：GeV尺度弱相互作用粒子的强子衰变
Rethinking search signatures: Hadronic decays of GeV-scale feebly coupled particles
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中文总结 AI 辅助
针对GeV尺度弱相互作用粒子，构建了基于电磁散射数据调优的强子化模型，纠正Pythia在低质量区的不准确性，将搜索特征从两粒子衰变转向多粒子衰变，并可直接集成到实验模拟框架中。
中文摘要 AI 辅助
针对GeV尺度弱相互作用粒子的实验搜索通常针对最简单的衰变特征，即包含两个带电粒子（包括强子）的衰变。强子模式往往主导总衰变率，其模拟在很大程度上依赖于\ extsc{Pythia}。Pythia的碎裂模型主要基于LEP数据校准，在该质量范围内并不可靠：它会填充对称性禁止的态，并错误识别占主导的允许通道。我们构建了一个简单的强子化模型，该模型根据电磁散射数据调优，并受守恒定律和现有排他性衰变计算的约束，同时保留适用于不同粒子模型的通用方案。以SHiP实验为例，我们表明我们的模型在事件选择后将主导搜索特征从两粒子衰变转变为多粒子衰变，包括混合带电-中性态。我们以可轻松集成到基于\ extsc{Pythia}的实验模拟框架中的形式提供该模型。
英文摘要
Experimental searches for GeV-scale feebly interacting particles commonly target the simplest decay signatures with two charged particles, including hadrons. Hadronic modes often dominate the inclusive decay rate, and their simulation relies extensively on \textsc{Pythia}. Its fragmentation model, calibrated mainly on LEP data, is unreliable in this mass range: it populates symmetry-forbidden states and misidentifies the dominant allowed channels. We construct a simple hadronization model tuned to electromagnetic scattering data and constrained by conservation laws and available exclusive decay calculations, while retaining a common prescription applicable to different particle models. Considering the SHiP experiment as an example, we show that our model shifts the dominant search signature after event selection from two-particle to multiparticle decays, including mixed charged-neutral states. We provide the model in a form that can be readily integrated into \textsc{Pythia}-based experimental simulation frameworks.
发表机构
- Taras Shevchenko National University of Kyiv（基辅塔拉斯舍甫琴科国立大学）
- CERN（欧洲核子研究中心）
机构由 AI 辅助整理，请以论文原文为准。
