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arXiv · 1710.05966

Angular distributions in pion-nucleon Drell-Yan process

I. V. Anikin·L. Szymanowski·O. V. Teryaev·N. Volchanskiy
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Abstract

We study the Drell-Yan process in the polarized pion-nucleon scattering. We calculate the $U(1)_\text{em}$ gauge invariant hadron tensors. To this end, we have to take into account two diagrams---the standard diagram and an additional one---both diagrams are required to get the gauge invariant hadron tensor. We obtain a new single transverse spin asymmetry that probes gluon poles and chiral-odd distribution functions. The process of pion-nucleon scattering in the limit of large Feynman $x$ is described by a convolution of two non-collinear exclusive-channel distribution amplitudes, which demonstrates the duality between different factorization regimes.

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I. V. Anikin, L. Szymanowski, O. V. Teryaev, N. Volchanskiy. 2017-10-16. Angular distributions in pion-nucleon Drell-Yan process. https://doi.org/10.1088/1742-6596/938/1/012065

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