[RBRC seminar] Effect of TMD Shape function in $J/\psi$ electroproduction

by Dr Raj Kishore (University of the Basque Country)

Thursday 11 Dec 2025, 12:30 → 14:30 US/Eastern

2-160 ( https://bnl.zoomgov.com/j/1600983728?pwd=RAD7OLcqre7Ycsp6JfFp6HAnpyLxex.1)

A proper transverse momentum-dependent (TMD) factorization for quarkonium production at low transverse momentum necessitates the convolution of the TMD parton distribution function (TMDPDF) with an additional transverse momentum-dependent function, known as the TMD shape function (TMDShF). I will present a phenomenological study of the impact of the TMDShF on quarkonium production in electron-proton collisions, comparing our results with predictions from the standard non-relativistic QCD (NRQCD) framework. Our analysis demonstrates that the inclusion of the TMDShF provides a qualitative explanation for the photo- and electro-production data, particularly at low transverse momentum, where standard NRQCD predictions fail. Furthermore, we discuss the implications of a proper treatment of the TMDShF for the extraction of long-distance matrix elements (LDMEs) in the low-to-intermediate transverse momentum regime.