Researchers from the CMS collaboration have analysed knowledge from proton-proton collisions in an try to search out cracks within the Commonplace Mannequin of particle physics
The CMS detector at CERN has continues to check the bounds of the Commonplace 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 basic forces of nature. The one distinction between these interactions needs to be as a result of totally different lots of the three particles.
This concept is a vital testable prediction of the Commonplace Mannequin and any deviations may counsel new physics past it.
Though many experimental outcomes have usually supported this declare, some latest experimental outcomes have proven tensions with its predictions.
Due to this fact the CMS collaboration at CERN got down to analyse knowledge from proton-proton collisions, this time utilizing a particular high-rate knowledge stream, designed for accumulating round 10 billion proton decays.
They seemed 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 needs to be virtually equal.
The authors discovered precisely that. To inside their experimental uncertainty, there was no proof of 1 decay being extra doubtless than the opposite.
These outcomes present additional assist for this precept and counsel that totally different avenues must be studied to hunt physics past the Commonplace Mannequin.
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