Comprehensive ALP Searches in Meson Decays
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909706347347968 |
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| author | Alda, Jorge Zamoro, Marta Fuentes Merlo, Luca Díaz, Xavier Ponce Rigolin, Stefano |
| author_facet | Alda, Jorge Zamoro, Marta Fuentes Merlo, Luca Díaz, Xavier Ponce Rigolin, Stefano |
| contents | We present a comprehensive study of axion-like particles (ALPs) in meson decays, combining effective field theory and ultraviolet models within the open-source tool ALPaca. The analysis accounts for running and matching effects across energy scales, including non-perturbative QCD corrections via chiral perturbation theory. We discuss several benchmark models, both flavour-universal and non-universal, using the most up-to-date theoretical computations for ALP decays and branching ratios. Experimental signatures such as prompt, displaced, and invisible decays are included. A dedicated analysis of the Belle II anomaly in the decay $B^+ \to K^+ ν\barν$ is performed. Our results highlight the power of flavour observables in constraining ALPs and provide a versatile foundation for future searches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_19578 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Comprehensive ALP Searches in Meson Decays Alda, Jorge Zamoro, Marta Fuentes Merlo, Luca Díaz, Xavier Ponce Rigolin, Stefano High Energy Physics - Phenomenology High Energy Physics - Experiment We present a comprehensive study of axion-like particles (ALPs) in meson decays, combining effective field theory and ultraviolet models within the open-source tool ALPaca. The analysis accounts for running and matching effects across energy scales, including non-perturbative QCD corrections via chiral perturbation theory. We discuss several benchmark models, both flavour-universal and non-universal, using the most up-to-date theoretical computations for ALP decays and branching ratios. Experimental signatures such as prompt, displaced, and invisible decays are included. A dedicated analysis of the Belle II anomaly in the decay $B^+ \to K^+ ν\barν$ is performed. Our results highlight the power of flavour observables in constraining ALPs and provide a versatile foundation for future searches. |
| title | Comprehensive ALP Searches in Meson Decays |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2507.19578 |