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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2407.20834 |
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| _version_ | 1866913711907667968 |
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| author | Piotrowska, Milena Giacosa, Francesco |
| author_facet | Piotrowska, Milena Giacosa, Francesco |
| contents | The decay of the para-positronium into two photons is studied in the framework of a composite Quantum Field Theoretical approach. This amounts to the evaluation of the electron-positron dressing together with the Weinberg compositeness condition for the positronium and the triangle-shaped diagram with virtual electrons circulating in it, leading to the two-photon final state. An important role is played by the positronium-electron-positron vertex, which is linked to the wave function of the para-positronium. We show how possible choices for the vertex function affect the $γγ$ decay rate. Outlooks to other decay channels and to other positronia are presented. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_20834 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Two-photon decay of para-positronium within a composite approach Piotrowska, Milena Giacosa, Francesco High Energy Physics - Phenomenology The decay of the para-positronium into two photons is studied in the framework of a composite Quantum Field Theoretical approach. This amounts to the evaluation of the electron-positron dressing together with the Weinberg compositeness condition for the positronium and the triangle-shaped diagram with virtual electrons circulating in it, leading to the two-photon final state. An important role is played by the positronium-electron-positron vertex, which is linked to the wave function of the para-positronium. We show how possible choices for the vertex function affect the $γγ$ decay rate. Outlooks to other decay channels and to other positronia are presented. |
| title | Two-photon decay of para-positronium within a composite approach |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2407.20834 |