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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2505.10437 |
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| _version_ | 1866910946410102784 |
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| author | Lee, Dayoung Nam, Seung-il Ahn, Jung Keun |
| author_facet | Lee, Dayoung Nam, Seung-il Ahn, Jung Keun |
| contents | We investigate double $ϕ$ production in $\bar{p}p$ reactions near threshold using an effective Lagrangian approach, highlighting a significant OZI rule violation through hadronic processes. Our model includes $t$- and $u$-channel contributions from the nucleon and $s$-wave $N^*$ resonances ($N^*(1535,1650,1895)$), as well as the pentaquark-like state $P_s(2071)$. In the $s$-channel, scalar ($f_0$), tensor ($f_2$), and pseudoscalar ($η(2225)$) mesons are incorporated. The $N$, $N^*$, $f_0$, and $f_2$ contributions enhance the cross-section and generate peak structures near $W=2.2$ GeV, consistent with JETSET data, while cusp structures arise from $\barΛΛ$ and $\barΣΣ$ threshold openings. Polarization observables, such as the spin density matrix element (SDME), further elucidate the underlying hadronic mechanisms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_10437 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Double $ϕ$-meson production via $\bar{p}p$ scattering Lee, Dayoung Nam, Seung-il Ahn, Jung Keun High Energy Physics - Phenomenology We investigate double $ϕ$ production in $\bar{p}p$ reactions near threshold using an effective Lagrangian approach, highlighting a significant OZI rule violation through hadronic processes. Our model includes $t$- and $u$-channel contributions from the nucleon and $s$-wave $N^*$ resonances ($N^*(1535,1650,1895)$), as well as the pentaquark-like state $P_s(2071)$. In the $s$-channel, scalar ($f_0$), tensor ($f_2$), and pseudoscalar ($η(2225)$) mesons are incorporated. The $N$, $N^*$, $f_0$, and $f_2$ contributions enhance the cross-section and generate peak structures near $W=2.2$ GeV, consistent with JETSET data, while cusp structures arise from $\barΛΛ$ and $\barΣΣ$ threshold openings. Polarization observables, such as the spin density matrix element (SDME), further elucidate the underlying hadronic mechanisms. |
| title | Double $ϕ$-meson production via $\bar{p}p$ scattering |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2505.10437 |