Speaker
Samet Lezki
(INFN Bari)
Description
The observation of two states consistent with being with the B+c(2S) and B∗+c(2S) states, in \ pp collisions at s√= 13 TeV, is presented.
It is obtained by exploiting an event sample corresponding to an integrated luminosity of 143\ fb−1, collected by the CMS experiment
during the whole Run-II of the LHC. These excited b¯c states are observed in the B+cπ+π− inva\ riant mass spectrum, with the ground
state B+c reconstructed through its decay to J/ψπ+.
The two states are reconstructed with a mass difference equal to 29.1 ± 1.5 (stat) ± 0.7 (sys\ t) MeV.
The mass of the B+c(2S) meson is measured to be 6871.0 ± 1.2 (stat) ± 0.8 (syst) ± 0.8 (B+c) \ MeV.
Collaboration name
CMS
Primary author
Samet Lezki
(INFN Bari)
