Resolve the high-transverse-momentum bottomonium discrepancy

Determine whether the discrepancies between the calculated and measured bottomonium nuclear modification factors at transverse momenta larger than the bottomonium mass can be resolved through a more explicit quantum evolution or through a change in the production mechanism, such as gluon fragmentation.

Background

The paper reports a persistent discrepancy between its bottomonium calculations and experimental data at transverse momenta larger than the bottomonium mass for all considered bottomonium states. The authors identify two possible explanations: a more explicit quantum-mechanical treatment of bottomonium evolution, or a change in the production mechanism toward processes such as gluon fragmentation. The paper does not determine which explanation is correct, leaving the origin of the high-transverse-momentum discrepancy unresolved.