The $ρ$ meson magnetic dipole moment from BaBar $e^+e^- \to π^+ π^-π^0 π^0 $ cross section measurement
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866910570863656960 |
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| author | Rojas, Antonio Toledo, Genaro |
| author_facet | Rojas, Antonio Toledo, Genaro |
| contents | We obtain the value of the magnetic dipole moment of the $ρ$ meson, using data from the BaBar Collaboration for the $e^{+} e^{-} \to π^+ π^- 2 π^0$ process. The considered center of mass energy range is from 0.9 to 1.8 GeV. We describe the $γ^* \to 4π$ vertex using a vector meson dominance model, including the intermediate resonant contributions relevant at these energies. We find $μ_ρ= 2.7 \pm 0.3 $ in $e/2 m_ρ$ units. We improve on the previous extracted value, where preliminary data from the same collaboration was used, by considering definite data, better grounded values of the parameters involved and explicit gauge invariant description of the process. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2406_14676 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The $ρ$ meson magnetic dipole moment from BaBar $e^+e^- \to π^+ π^-π^0 π^0 $ cross section measurement Rojas, Antonio Toledo, Genaro High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory We obtain the value of the magnetic dipole moment of the $ρ$ meson, using data from the BaBar Collaboration for the $e^{+} e^{-} \to π^+ π^- 2 π^0$ process. The considered center of mass energy range is from 0.9 to 1.8 GeV. We describe the $γ^* \to 4π$ vertex using a vector meson dominance model, including the intermediate resonant contributions relevant at these energies. We find $μ_ρ= 2.7 \pm 0.3 $ in $e/2 m_ρ$ units. We improve on the previous extracted value, where preliminary data from the same collaboration was used, by considering definite data, better grounded values of the parameters involved and explicit gauge invariant description of the process. |
| title | The $ρ$ meson magnetic dipole moment from BaBar $e^+e^- \to π^+ π^-π^0 π^0 $ cross section measurement |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2406.14676 |