تقرير
Boer-Mulders function of pion meson and $q_T$-weighted $\cos2\phi$ asymmetry in the unpolarized $\pi^- p$ Drell-Yan at COMPASS
| العنوان: | Boer-Mulders function of pion meson and $q_T$-weighted $\cos2\phi$ asymmetry in the unpolarized $\pi^- p$ Drell-Yan at COMPASS |
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| المؤلفون: | Wang, Zhengxian, Wang, Xiaoyu, Lu, Zhun |
| المصدر: | Phys. Rev. D 95, 094004 (2017) |
| سنة النشر: | 2017 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Experiment |
| الوصف: | We calculate the two leading-twist transverse momentum dependent distribution functions of the pion meson, the unpolarized distribution $f_{1\pi}(x,\bm{k}^2_T)$ and the Boer-Mulders function $h_{1\pi}^\perp (x,\bm{k}^2_T)$, using the pion wave functions derived from a light-cone approach. The evolution effect of the first $\bm k_T$-moment of the pion Boer-Mulders function is studied by employing an approximate evolution kernel. Using the model resulting distributions, we predict the transverse momentum weighted $\cos2\phi$ azimuthal asymmetry in the unpolarized $\pi^- p$ Drell-Yan process which can be measured at COMPASS in the near future. Comment: 9 pages, 5 figures, match the version published in PRD |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.95.094004 |
| URL الوصول: | http://arxiv.org/abs/1702.03637 |
| رقم الأكسشن: | edsarx.1702.03637 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.95.094004 |
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