Improving $ππ$ dispersive analyses and resonance determination with Forward Dispersion Relations
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866929718633168896 |
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| author | Rabán, P. Peláez, J. R. de Elvira, J. Ruiz |
| author_facet | Rabán, P. Peláez, J. R. de Elvira, J. Ruiz |
| contents | We present preliminary results of an improved pion-pion scattering dispersive analysis that includes: a refined treatment of inelasticities, the introduction of G-waves, the extension of Forward Dispersion Relations as constraints up to 1.6 GeV, and data description up to roughly 1.8 GeV. Additionally, we impose Roy-like dispersion relations. As a result, we obtain three reliable solutions corresponding to three different datasets. From the Forward Dispersion Relation output, we extract resonance pole parameters in a parameterization-independent way using continued fractions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_17932 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Improving $ππ$ dispersive analyses and resonance determination with Forward Dispersion Relations Rabán, P. Peláez, J. R. de Elvira, J. Ruiz High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Nuclear Theory We present preliminary results of an improved pion-pion scattering dispersive analysis that includes: a refined treatment of inelasticities, the introduction of G-waves, the extension of Forward Dispersion Relations as constraints up to 1.6 GeV, and data description up to roughly 1.8 GeV. Additionally, we impose Roy-like dispersion relations. As a result, we obtain three reliable solutions corresponding to three different datasets. From the Forward Dispersion Relation output, we extract resonance pole parameters in a parameterization-independent way using continued fractions. |
| title | Improving $ππ$ dispersive analyses and resonance determination with Forward Dispersion Relations |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Nuclear Theory |
| url | https://arxiv.org/abs/2412.17932 |