Heavy-flavour hadron production

TL;DR

This paper reviews recent experimental results on heavy-flavour hadron production in proton-proton collisions at the LHC, highlighting tensions with traditional models and discussing baryon production enhancements.

Contribution

It presents the latest measurements from LHC experiments and compares them with theoretical models, emphasizing discrepancies in heavy-flavour baryon production.

Findings

Observed tensions between measurements and model predictions.

Evidence of baryon enhancement in hadronic collisions.

Discussions on the limitations of the factorisation approach.

Abstract

The conventional description of heavy-flavour hadron production in pp collisions is based on a factorisation approach, assuming universal fragmentation functions among collision systems. Recent results on heavy-flavour baryon measurements from the LHC experiments show tensions with model calculations based on this approach and employing fragmentation functions constrained from $\rm e^+e^-$ and $\rm e^-p$ collision experiments. In this contribution, the most recent results from ALICE, ATLAS, CMS and LHCb experiments on the heavy-flavour hadron production in pp collisions at the TeV scale are reported. The comparison with the theoretical predictions that address the baryon enhancement in hadronic collisions at the LHC is also discussed.