It is proposed that the source of the CMB arises from microwaves emitted from atoms at very low temperatures. The metric employed, an exact solution of the Einstein field equations, embraces the electrical interaction as well as the gravitational interaction. It is applied semi-classically to atomic spectra. The result is that a number of elements – hydrogen, nitrogen, carbon, chlorine, iron,...
Semi-leptonic b-baryon decays provide a unique means to investigate Lepton Flavour Universality (LFU) at the LHCb experiment. Sensitivity to New Physics (NP) contributions could show up in the angular observables of the decay products. In this work, the decay amplitude of the process $\Lambda_{b}\to\Lambda_{c}\, l\,\nu$ as a function of the squared di-lepton invariant mass and lepton helicity...