Report
A model-independent analysis of final-state interactions in \bar B_{d/s}^0 --> J/psi pi pi
| العنوان: | A model-independent analysis of final-state interactions in \bar B_{d/s}^0 --> J/psi pi pi |
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| المؤلفون: | Daub, J. T., Hanhart, C., Kubis, B. |
| المصدر: | JHEP 1602, 009 (2016) |
| سنة النشر: | 2015 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Experiment |
| الوصف: | Exploiting $B$-meson decays for Standard Model tests and beyond requires a precise understanding of the strong final-state interactions that can be provided model-independently by means of dispersion theory. This formalism allows one to deduce the universal pion-pion final-state interactions from the accurately known $\pi\pi$ phase shifts and, in the scalar sector, a coupled-channel treatment with the kaon-antikaon system. In this work an analysis of the decays $\bar B_d^0 \to J/\psi \pi^+\pi^-$ and $\bar B_s^0 \to J/\psi \pi^+\pi^-$ is presented. We find very good agreement with the data up to 1.05 GeV with a number of parameters reduced significantly compared to a phenomenological analysis. In addition, the phases of the amplitudes are correct by construction, a crucial feature when it comes to studies of $CP$ violation in heavy-meson decays. Comment: 25 pages, 6 figures, version published in JHEP |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1007/JHEP02(2016)009 |
| URL الوصول: | http://arxiv.org/abs/1508.06841 |
| رقم الانضمام: | edsarx.1508.06841 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1007/JHEP02(2016)009 |
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