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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2410.00238 |
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| _version_ | 1866910908659269632 |
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| author | Bediaga, I. Frederico, T. Magalhães, P. C. Shalchi, M. A. |
| author_facet | Bediaga, I. Frederico, T. Magalhães, P. C. Shalchi, M. A. |
| contents | We explore the contribution of hadronic final state interactions (FSI) to propose a production mechanism and interpret the puzzle on helicity angle distributions in $B^+\to p\bar p π^+$ and $B^+\to p\bar p K^+$ decays. Experimental results indicate opposite helicity angle $θ_p$ distributions in those two channels with the difference presenting a remarkable linear dependence on $\cos θ_p$. We assume the production mechanism is driven by $B^+\to xy\, m^+ \to p\bar p m^+$, where $m =π$ or $K$, and $xy$ represents favorable mesonic decay channels producing $p\bar p$. We develop a model that includes three-body final state interaction between the $p\,,~\bar p$ and $π^+$ or $K^+$ considering the dominance of elastic channels $π^+p$ and $K^+\bar p$ interactions below 2\,GeV/c$^2$. Our three-body framework with FSI explains qualitatively the observed opposite behavior of the helicity distributions and the observed linearity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_00238 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Hadronic rescattering to solve helicity puzzle in $B^+\to p\bar p π^+(K^+)$ decays Bediaga, I. Frederico, T. Magalhães, P. C. Shalchi, M. A. High Energy Physics - Phenomenology High Energy Physics - Experiment We explore the contribution of hadronic final state interactions (FSI) to propose a production mechanism and interpret the puzzle on helicity angle distributions in $B^+\to p\bar p π^+$ and $B^+\to p\bar p K^+$ decays. Experimental results indicate opposite helicity angle $θ_p$ distributions in those two channels with the difference presenting a remarkable linear dependence on $\cos θ_p$. We assume the production mechanism is driven by $B^+\to xy\, m^+ \to p\bar p m^+$, where $m =π$ or $K$, and $xy$ represents favorable mesonic decay channels producing $p\bar p$. We develop a model that includes three-body final state interaction between the $p\,,~\bar p$ and $π^+$ or $K^+$ considering the dominance of elastic channels $π^+p$ and $K^+\bar p$ interactions below 2\,GeV/c$^2$. Our three-body framework with FSI explains qualitatively the observed opposite behavior of the helicity distributions and the observed linearity. |
| title | Hadronic rescattering to solve helicity puzzle in $B^+\to p\bar p π^+(K^+)$ decays |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2410.00238 |