Researchers from the CMS collaboration have analysed information from proton-proton collisions in an try to search out cracks within the Customary Mannequin of particle physics
(Courtesy: CERN)
Lepton flavour universality is a precept in particle physics that issues how all leptons (electrons, muons and taons) ought to work together with the elemental forces of nature. The one distinction between these interactions ought to be because of the totally different plenty of the three particles.
This concept is an important testable prediction of the Customary Mannequin and any deviations would possibly recommend new physics past it.
Though many experimental outcomes have usually supported this declare, some latest experimental outcomes have proven tensions with its predictions.
Subsequently the CMS collaboration at CERN got down to analyse information from proton-proton collisions, this time utilizing a particular high-rate information stream, designed for accumulating round 10 billion proton decays.
They appeared for indicators of the decay of B mesons (a backside quark and an up antiquark) into electron-positron or muon-antimuon pairs.
If lepton flavour universality is true, the probability of those two outcomes ought to be nearly equal.
The authors discovered precisely that. To inside their experimental uncertainty, there was no proof of 1 decay being extra probably than the opposite.
These outcomes present additional help for this precept and recommend that totally different avenues must be studied to hunt physics past the Customary Mannequin.
