The LHCb collaboration ended Sunday with its four-sigma anomaly in the charming-penguin B-meson decay sitting unchanged at the threshold the field has marked since the April Phys.org write-up. [1] Run 3, which began in July 2022 and is scheduled through the end of 2026, has already collected more than three times the integrated luminosity of the full 2018 dataset and continues to take data. [2] What it has not produced is a five-sigma confirmation.

The paper's Sunday read framed this as the binary between five-sigma confirmation and quiet collapse, with the additional twist that the bottleneck is not the experimental side but the theoretical one. The "charming penguin" amplitude — a Standard Model contribution involving virtual charm-quark loops — is the calculation that has to be sharper before the data can be told what it means. [1] Lattice-QCD groups have not closed the systematic-uncertainty budget needed to interpret the anomaly without ambiguity.

The discovery clock that matters now is the High-Luminosity LHC upgrade and the LHCb Upgrade II, which together will deliver roughly fifteen times the current integrated dataset by the mid-2030s. [3] An anomaly resolved in 2030s data is a finding produced by an apparatus that does not exist yet, in a paper not yet drafted, by physicists some of whom are still in graduate school. The institution survives that timescale; institutions that try to fire it by email do not.

-- KENJI NAKAMURA, Tokyo