تقرير
Determination of pion distribution amplitudes from the electromagnetic form factor with the data-driven dispersion relation
| العنوان: | Determination of pion distribution amplitudes from the electromagnetic form factor with the data-driven dispersion relation |
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| المؤلفون: | Chai, Jian, Cheng, Shan, Hua, Jun |
| سنة النشر: | 2022 |
| المجموعة: | High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology |
| الوصف: | We study the pion electromagnetic form factor in the modulus squared dispersion relation, and do the model independent extraction of the most important nonperturbative parameters in pion light-cone distribution amplitude. The motivation of this work is the recent measurement of timelike form factor in the resonant regions, which makes up the piece lacking solid QCD-based calculation. With the perturbative QCD calculation up to next-to-leading-order QCD corrections and twist four level of meson distribution amplitudes, we obtain the chiral mass of pion meson as $m_0^\pi(1 \, {\rm GeV}) = 1.31^{+0.27}_{-0.30} \, {\rm GeV}$. More accuracy measurement of the timelike form factor are desirable to help us to determine the lowest gegenbauer moments in pion distribution amplitudes with the data-driven dispersion relation method developed in this work. Comment: 9pages, 6 figures, 1 table |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1140/epjc/s10052-023-11725-2 |
| URL الوصول: | http://arxiv.org/abs/2209.13312 |
| رقم الأكسشن: | edsarx.2209.13312 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1140/epjc/s10052-023-11725-2 |
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