Branching fraction tension
The Bs→φμ+μ– branching fraction measured below the Standard Model prediction. This week at the Flavor Physics and CP Violation (FPCP) conference in Shanghai, China, the LHCb Collaboration presented a measurement…
First observation of the mass difference between neutral charm mesons.
m1-m2 = 6.4×10-6 eV = 0.00000000000000000000000000000000000001 grams (1×10-38g) (m1-m2)/(D0mass) = 3×10-15 Today, the LHCb Collaboration submitted a paper for publication that reports the first observation of the mass difference between…