Ratio of the neutral pion (Left) and eta meson (Right) invariant cross sections to their respective TCM parametrisations . Additionally, the ratios of NLO pQCD calculations and PYTHIA 8 Monash 2013 predictions to the TCM data fit are shown at the respective centre-of-mass energies. The NLO pQCD blue band in the left panel for $\pi^0$ is obtained considering the factorisation scale values $0.5\pT \mu 2\pT$.