New test of lepton universality using the first simultaneous measurement of R(D) and R(D*) observables at LHCb
[ R(D*) = 0.281±0.018±0.024 ][ R(D) = 0.441±0.060±0.066 ] Today at the CERN seminar the LHCb Collaboration presented new tests of lepton universality, one of the basic principles of the…