The LHCb collaboration has released a much anticipated update on its measurement of RK – a powerful test of lepton universality.
Met with an impromptu champagne celebration, the result represents a milestone in particle physics.
BaBar has now chalked up more than 580 papers on CP violation and many other topics.
Given LHCb’s current level of experimental precision, any sign of CP violation would be a clear indication of physics beyond the Standard Model.
LHCb has been flooded by b- and c-hadrons due to the large beauty and charm production cross-sections within the experiment’s acceptance.
At first glance, measuring fully leptonic decays seems a step too far, since there is only one charged particle as a signature and no reconstructed B-decay vertex.
Recent results from LHCb and other experiments appear to challenge the assumption of lepton-flavour universality.
Experimental evidence was first reported in the 1970s, but there has been a lingering theoretical controversy about the interpretation of both states.
By studying new hadronic resonances and their excited states, light can be shed on the mechanisms governing the dynamics of the strong force.
The unitarity triangle exists in the complex plane and its area is a measure of the amount of CP violation in the Standard Model.