Measurement of the groomed jet mass for $R=0.2$ charged-particle jets in $40 < p_\text{T}^\text{ch jet} < 60$ GeV/$c$ in Pb-Pb collisions at $\sqrt{s_\text{NN}}=5.02$ TeV and  pp collisions at $\sqrt{s}=5.02$ TeV as compared to various models. Grooming is carried out using the Soft Drop algorithm with $z_\text{cut}=0.2$ and $\beta=0$. On the top panel, the solid black data points and associated vertical error bars correspond to the ALICE Pb-Pb measurement and its statistical uncertainties, with the solid grey boxes corresponding to the Pb-Pb measurement systematic uncertainties; the empty points represent the ALICE pp measurement, and the dashed boxes the pp measurement systematic uncertainties. On the bottom panel, each model is presented with respect to its respective pp baseline, and a box is drawn corresponding to the purely statistical uncertainties of the model calculations, assuming that the pp and Pb-Pb calculations are statistically uncorrelated. The ratio between the ALICE pp and Pb-Pb data similarly assumes that all uncertainties are uncorrelated between the two different systems.

The Higher-Twist parton energy loss approach to jet quenching [1] is shown, using POWHEG [2] with PYTHIA [3] matching at NLO as a baseline; a prediction using JETSCAPE [4] is given, with an in-medium parton shower described by the MATTER [5] (high-virtuality regime) and LBT [6] (low-virtuality regime) models; finally, predictions using the Hybrid model [7] both with and without elastic Molière scattering [8] are also given.

[1] Chin. Phys. C45 (2021) no. 2, 024102, arXiv:2005.01093 [hep-ph]
[2] Nucl. Phys. Proc. Suppl. 205-206:36-41 (2010), arXiv:1007.3893 [hep-ph]
[3] Comput. Phys. Commun. 191 (Jun, 2015) 159–177, arXiv:1410.3012 [hep-ph]
[4] arXiv:1903.07706 [nucl-th]
[5] Phys. Rev. C 88 (2013) 014909, arXiv:1301.5323 [nucl-th]
[6] Phys. Rev. C 91 (2015) 054908, arXiv:1503.03313 [nucl-th]
[7] JHEP 10 (2014) 019, arXiv:1405.3864 [hep-ph]
[8] JHEP 01 (2019) 172, arXiv:1808.03250 [hep-ph]