Prompt hadroproduction of C-even quarkonia in the light-front k_T -factorization approach

2021/07/24 by Wolfgang Schäfer, Schäfer, Wolfgang, Izabela Babiarz +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2107.11661

openalex publication_date 2021/07/24 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28

Abstract

We present a new approach for the prompt production of quarkonia which is based on the k_T-factorization method. The production of even C-parity quarkonia proceeds via the fusion of two (off-shell) gluons. Especially in the kinematics of the LHCb experiment these processes are thus expected to be a sensitive probe of the small-x gluon distribution. We calculate the relevant off-shell matrix elements in terms of the light-front wave functions of the quarkonium states. We present our results for scalar and pseudoscalar charmonia and discuss photon transition form factors as well as cross sections for prompt hadroproduction. We compare our results for the η_c to recent LHCb data.

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