Measurements of CPT Violation at LHCb

Abstract

Recent measurements of CPT violation and Lorentz symmetry breaking in $B^0-{\bar{B}}^0$ mixing and $B_s^0-{\bar{B}}_s^0$ mixing, obtained from data taken by the LHCb experiment, are highlighted. The results are expressed in terms of the Standard-Model Extension (SME) coefficients, which incorporate both CPT and Lorentz violation. Due to the large boost of the $B$ mesons at LHCb, the SME coefficients can be determined with high precision. The bounds on these coefficients are improved significantly compared to previous measurements.

Comments: Presented at the Seventh Meeting on CPT and Lorentz Symmetry, Bloomington, Indiana, June 20-24, 2016