The charming case of $X(3872)$ and $χ_{c1}(2P)$
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| Format: | Preprint |
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2025
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| _version_ | 1866916783359787008 |
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| author | Colangelo, Pietro De Fazio, Fulvia Roselli, Giuseppe |
| author_facet | Colangelo, Pietro De Fazio, Fulvia Roselli, Giuseppe |
| contents | More than twenty years have elapsed since the discovery of $χ_{c1}(3872)$ (previously denoted as $X(3872)$), and an impressive amount of theoretical and experimental studies has been devoted to its properties, decays and production mechanisms. Despite the extensive work, a full understanding of the nature of $χ_{c1}(3872)$ is still missing. In the present study we reconsider a theoretical framework based on the heavy quark large mass limit to analyse the radiative decays of heavy quarkonia, in particular the electric dipole transitions of $χ_{c1}(2P)$ to S-wave charmonia. The results favourably compare to recent measurements for $χ_{c1}(3872)$, obtained by the LHCb Collaboration, if this meson is identified with $χ_{c1}(2P)$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_15888 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The charming case of $X(3872)$ and $χ_{c1}(2P)$ Colangelo, Pietro De Fazio, Fulvia Roselli, Giuseppe High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice More than twenty years have elapsed since the discovery of $χ_{c1}(3872)$ (previously denoted as $X(3872)$), and an impressive amount of theoretical and experimental studies has been devoted to its properties, decays and production mechanisms. Despite the extensive work, a full understanding of the nature of $χ_{c1}(3872)$ is still missing. In the present study we reconsider a theoretical framework based on the heavy quark large mass limit to analyse the radiative decays of heavy quarkonia, in particular the electric dipole transitions of $χ_{c1}(2P)$ to S-wave charmonia. The results favourably compare to recent measurements for $χ_{c1}(3872)$, obtained by the LHCb Collaboration, if this meson is identified with $χ_{c1}(2P)$. |
| title | The charming case of $X(3872)$ and $χ_{c1}(2P)$ |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2501.15888 |