J/psi Production: Tevatron and Fixed-Target Collisions

TL;DR

This paper analyzes J/psi production in Tevatron and fixed-target collisions using NRQCD, fitting matrix elements to experimental data and including radiative corrections and k_T-smearing effects.

Contribution

It provides a combined NLO NRQCD analysis of J/psi production in different collision environments, incorporating radiative corrections and k_T effects, and compares results across experiments.

Findings

Fitted NRQCD matrix elements to CDF data with radiative corrections.

Performed NLO analysis of fixed-target proton-nucleon collisions.

Compared matrix elements and results between Tevatron and fixed-target data.

Abstract

In this talk I show the results of a fit of the NRQCD matrix elements to the CDF data for direct $J/\psi$ production, by including the radiative corrections to the colour-singlet channel and the effect of the $k_T$-smearing. Furthermore I perform the NLO NRQCD analysis of $J/\psi$ production in fixed-target proton-nucleon collisions and I fit the colour-octet matrix elements to the available experimental data. The results are compared to the Tevatron ones.