LHCb experiment. Image courtesy of CERN.In November 2020, the LHCb collaboration announced a major new development, based on data collected during LHC Run 2, confirming and significantly strengthening an anomalous observation in decays of B mesons. 

Postdoc Will Parker and Distinguished University Professor Hassan Jawahery of the UMD flavor physics group recently discussed their work and "matter-antimatter weirdness" in Symmetry magazine. 

The 2020 result followed the LHCb's previous observation of CP violation in decays of D mesons. That finding was rated a Physics World Breakthrough of the Year finalist for 2019.

The Symmetry story is posted here: https://www.symmetrymagazine.org/article/lhcb-finds-more-matter-antimatter-weirdness-in-b-mesons