The spin density matrix element $rho_{00}$ for prompt and non-prompt D* mesons as a function of $p_T$ for both helicity (left) and production (right) frame in pp collisions at $\sqrt(s) = 13.6 TeV$. Measurements are carried out with respect to the production axis at $|y|<0.8$. Statistical and systematic uncertainties are represented by bars and boxes, respectively.
The measurements are compared with the same measurment during Run 2 and estimations from the QCD-based MC event generator pythia8 + Evtgen. Run 2 points are shown with open markers, and Model estimations are shown by colour bands where the width of the band corresponds to the statistical uncertainty in model calculations.