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arXiv 2501.04525hep-ph
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推进GeV尺度轴子类粒子的现象学

Advancing the phenomenology of GeV-scale axion-like particles

Theoretical Physics Department, CERN（欧洲核子研究中心理论物理部）；Taras Shevchenko National University of Kyiv（基辅塔拉斯舍甫琴科国立大学）

Maksym Ovchynnikov, Andrii Zaporozhchenko

备注：
Typos corrected and discussion slightly extended compared to the published version; conclusions unchanged
发表信息：
Phys. Rev. D 112, 01500 (2025)
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AI总结：

本文提出了一种新的框架，以chiral旋转不变的方式处理GeV尺度轴子类粒子的相互作用，并考虑其与更重激发态的混合，从而改进了相关实验的预测和解释。

摘要：

针对质量在GeV范围的轴子类粒子（ALPs）的搜索是当前和未来强度前沿实验的核心目标。解释这些搜索需要可靠的ALP在强子碰撞中的产生和衰变描述。目前社区采用的方案（i）依赖于非物理的chiral旋转参数，用于将 gluonic ALP 互动与有界态的互动匹配；（ii）错误描述了ALP流的质子缩放，并忽略了与重伪标量共振态的混合。我们引入了一个框架，以chiral旋转不变的方式处理GeV尺度ALP相互作用，包括其与更重的激发态π(1300)、η(1295)和η(1440)的混合，并正确描述其产生通道。当将我们的描述应用于质子束实验时，我们发现现有界限和投影灵敏度相对于早期估计最多改变一个数量级。我们进一步阐明了主导的理论不确定性，这些不确定性来源于伪标量激发态光谱的仍不完整的实验知识。

英文摘要：

Searches for axion-like particles (ALPs) with masses in the GeV range are a central objective of present and future Intensity Frontier experiments. Interpreting these searches demands a reliable description of ALP production in hadronic collisions and decay. The prescription currently adopted by the community (i) depends on parameters of unphysical chiral rotation used to match gluonic ALP interactions with the interactions in terms of hadronic bound states, (ii) misdescribes the mass scaling of the ALP flux, and neglects mixing with heavy pseudoscalar resonances. We introduce a framework that treats GeV-scale ALP interactions in a chiral-rotation-invariant manner, includes their mixing with heavier excitations $π(1300)$, $η(1295)$, and $η(1440)$, and properly describes their production channels. When applying our description to proton beam experiments, we find that existing bounds and projected sensitivities shift by up to an order of magnitude relative to earlier estimates. We further delineate the dominant theoretical uncertainties, which originate from the still-incomplete experimental knowledge of the spectrum of pseudoscalar excitations.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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