Phenomenological model for the $γ^*γ\to ηπ^+ π^-$ reaction in the $f_1(1285)$ energy region
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866916489913696256 |
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| author | Ren, Xiu-Lei Danilkin, Igor Vanderhaeghen, Marc |
| author_facet | Ren, Xiu-Lei Danilkin, Igor Vanderhaeghen, Marc |
| contents | Motivated by the ongoing analysis by the BESIII Collaboration on the single-tagged $e^+e^-\to e^+e^- ηπ^+π^-$ reaction, we present a phenomenological study of the diphoton fusion to $ηπ^+ π^-$, focusing on the production mechanism of the $f_1(1285)$ resonance. Contributions from the $f_1(1285)\to a_0(980)^\pm\, π^\mp$ and $f_1(1285)\to σ/f_0(500)\, η$ channels are included without introducing free parameters within an effective Lagrangian approach. Assuming the destructive interference between the amplitudes, we predict the invariant mass distributions, angular distributions, and total cross sections of the $γ^*γ\to ηπ^+π^-$ process, which will be tested by the forthcoming BESIII measurements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_07235 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Phenomenological model for the $γ^*γ\to ηπ^+ π^-$ reaction in the $f_1(1285)$ energy region Ren, Xiu-Lei Danilkin, Igor Vanderhaeghen, Marc High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory Motivated by the ongoing analysis by the BESIII Collaboration on the single-tagged $e^+e^-\to e^+e^- ηπ^+π^-$ reaction, we present a phenomenological study of the diphoton fusion to $ηπ^+ π^-$, focusing on the production mechanism of the $f_1(1285)$ resonance. Contributions from the $f_1(1285)\to a_0(980)^\pm\, π^\mp$ and $f_1(1285)\to σ/f_0(500)\, η$ channels are included without introducing free parameters within an effective Lagrangian approach. Assuming the destructive interference between the amplitudes, we predict the invariant mass distributions, angular distributions, and total cross sections of the $γ^*γ\to ηπ^+π^-$ process, which will be tested by the forthcoming BESIII measurements. |
| title | Phenomenological model for the $γ^*γ\to ηπ^+ π^-$ reaction in the $f_1(1285)$ energy region |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2409.07235 |