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arXiv · 1807.08697

Probing the Weizsäcker-Williams gluon Wigner distribution in pp collisions

Renaud Boussarie·Yoshitaka Hatta·Bo-Wen Xiao·Feng Yuan
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Abstract

We show that the diffractive forward production of two quarkonia, especially the $χ_{cJ}$ and $η_c$ states, in proton-proton or proton-ion collisions can access the Weizsäcker-Williams gluon Wigner distribution of the proton. We use the hybrid factorization approach where the collinear, double gluon PDF is applied for one of the protons and the $k_T$-dependent (Wigner or GTMD) distribution for the other. The production of quarkonia is treated in the NRQCD framework. A particularly concise formula is obtained for double $χ_{J=1}$ production.

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Renaud Boussarie, Yoshitaka Hatta, Bo-Wen Xiao, Feng Yuan. 2018-07-23. Probing the Weizsäcker-Williams gluon Wigner distribution in pp collisions. https://doi.org/10.1103/physrevd.98.074015

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