Exclusive double quarkonium production and generalized TMDs of gluons


Abstract in English

Being the mother distributions of all types of two-parton correlation functions, generalized transverse momentum dependent parton distributions (GTMDs) have attracted a lot of attention over the last years. We argue that exclusive double production of pseudoscalar quarkonia ($eta_c$ or $eta_b$) in nucleon-nucleon collisions gives access to GTMDs of gluons.

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