Heavy Flavour Production at HERA
Benno List (for the H1, ZEUS Collaborations)
TL;DR
This paper reviews heavy flavour production at HERA, showing that charm production aligns well with NLO QCD predictions overall, but some discrepancies exist in specific regions, and beauty production data suggest NLO predictions may underestimate actual cross sections.
Contribution
It provides a comprehensive comparison of charm and beauty production data with NLO QCD calculations at HERA, highlighting areas of agreement and discrepancy.
Findings
Charm production matches NLO QCD predictions in total rate and shape.
In certain phase space regions, NLO underestimates charm cross sections.
Beauty production data indicate NLO predictions are lower than measurements.
Abstract
The production of charm and beauty quarks in ep collisions at HERA has been studied by the H1 and ZEUS collaborations. Charm production is generally well described in total rate and in shape by next to leading order (NLO) calculations in perturbative quantum chromodynamics (QCD), although in specific phase space corners the NLO calculations underestimate the observed cross sections. More and more beauty production data are becoming available. For this process, NLO QCD predictions tend to be lower than the measurements.
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