$γ, J/ψ$ production through ISR process in electron-positron annihilation at B-factories
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arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866908479216680960 |
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| author | Bhatnagar, Shashank |
| author_facet | Bhatnagar, Shashank |
| contents | We study the Initial state radiation (ISR) process, $e^- e^+ \rightarrow^*γ\rightarrow γ+J/ψ$ observed at high luminosity $e^- e^+$ colliders such as B-factories, with the ISR photon being emitted through the initial electron or positron, prior to their annihilation. The emitted $J/Ψ$ is produced through the photon fragmentation process, with the produced $J/ψ$ in turn decaying into a pair of leptons, $μ^-+μ^+$ through the leptonic decay process, $J/Ψ\rightarrow γ^*\rightarrow γμ^- μ^+$. The cross section for the $J/Ψ$ production, and the branching ratio for the leptonic decay of $J/Ψ\rightarrow μ^- μ^+$, both calculated in the framework of Bethe-Salpeter equation are used to work out the cross section for the complete process, $e^- e^+ \rightarrow γ+J/ψ\rightarrow γ+μ^- +μ^+$. Our results are compared with the BaBar data, and other models. This study is then extended to production and decays of $Υ(1S)$ through the ISR process. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_03212 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | $γ, J/ψ$ production through ISR process in electron-positron annihilation at B-factories Bhatnagar, Shashank High Energy Physics - Phenomenology We study the Initial state radiation (ISR) process, $e^- e^+ \rightarrow^*γ\rightarrow γ+J/ψ$ observed at high luminosity $e^- e^+$ colliders such as B-factories, with the ISR photon being emitted through the initial electron or positron, prior to their annihilation. The emitted $J/Ψ$ is produced through the photon fragmentation process, with the produced $J/ψ$ in turn decaying into a pair of leptons, $μ^-+μ^+$ through the leptonic decay process, $J/Ψ\rightarrow γ^*\rightarrow γμ^- μ^+$. The cross section for the $J/Ψ$ production, and the branching ratio for the leptonic decay of $J/Ψ\rightarrow μ^- μ^+$, both calculated in the framework of Bethe-Salpeter equation are used to work out the cross section for the complete process, $e^- e^+ \rightarrow γ+J/ψ\rightarrow γ+μ^- +μ^+$. Our results are compared with the BaBar data, and other models. This study is then extended to production and decays of $Υ(1S)$ through the ISR process. |
| title | $γ, J/ψ$ production through ISR process in electron-positron annihilation at B-factories |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2508.03212 |