Physicists expect the standard model to be incomplete because it cannot explain phenomena such as dark matter, even as measurements keep confirming it with higher precision. A previously concerning W-boson mass discrepancy disappeared after further investigation. A new LHC analysis from CERN’s LHCb experiment, accepted for publication in Physical Review Letters, indicates increased evidence for a remaining anomaly involving B-meson decays. LHCb searches for subtle effects from virtual heavy particles by analyzing decay frequencies and emission angles against standard-model predictions. The new analysis studies timing of B-meson decays into a meson containing a strange quark.
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