Prima osservazione del mesone B0 in collisione PbPb a 5.02 TeV con il rivelatore CMS​

A search for the B0 meson is conducted using the LHC PbPb data collected in 2018 by the CMS experiment at CERN. The B0 signal is reconstructed via the decay to J/Psi and K*0(892), where the latter mesons are reconstructed respectively in the mu+mu- and K+ pi- channels. A possible observation of the B0 meson in heavy ion collisions shall provide a novel probe of the quark-gluon plasma (QGP), and contribute to a characterization of the flavour dependence of the energy loss of partons as they traverse the hot QGP medium. A signal compatible with the B0 meson is found with a significance well in excess of 5 standard deviations.​