Extended Data Fig. 7: Limits on the dimension-eight new physics operator.
From: Search for quantum gravity using astrophysical neutrino flavour with IceCube
The hatched region is the limit obtained from the atmospheric neutrino data analysis on \({{{\rm{Re}}}}({\mathring{c}}_{\mu \tau }^{(8)})\)15. Limits determined by Bayes factors > 10 (dashed lines) and > 31.6 (solid lines) are presented as a function of the assumed astrophysical neutrino flavour ratio at the production source. The leftmost scenario is νμ dominant (0: 1: 0)S and the rightmost is νe dominant (1: 0: 0)S. The preferred scenario corresponds to (1/3: 2/3: 0)S (dashed vertical line). Limits on \({{{\rm{Re}}}}({\mathring{c}}_{ee}^{(8)})\) on (orange), \({{{\rm{Re}}}}({\mathring{c}}_{e\mu }^{(8)})\) (red), \({{{\rm{Re}}}}({\mathring{c}}_{e\tau }^{(8)})\) (green), \({{{\rm{Re}}}}({\mathring{c}}_{\mu \mu }^{(8)})\) (yellow), \({{{\rm{Re}}}}({\mathring{c}}_{\mu \tau }^{(8)})\) (purple), and \({{{\rm{Re}}}}({\mathring{c}}_{\tau \tau }^{(8)})\) (blue) are shown.
