Using proton-proton collision data collected by the CMS experiment at √𝑠=13 TeV in 2016–2018, corresponding to an integrated luminosity of 140 fb−1, the first full reconstruction of the three vector B meson states, B*+, B*0 , and Bs*0, is performed. The mass differences between the excited mesons and their corresponding ground states are measured to be m(B*+)−m(B+)=45.277±0.039±0.027 MeV, m(B*0)−m(B0)=45.471±0.056±0.028 MeV, and m(B𝑠*0)−m(B𝑠0)=49.407±0.132±0.041 MeV, where the first uncertainties are statistical and the second are systematic. These results improve on the precision of previous measurements by an order of magnitude.
First Exclusive Reconstruction of the B*+, B*0, and Bs*0 Mesons and Precise Measurement of Their Masses
Abbrescia, M.;Buonsante, M.;Colaleo, A.;Elmetenawee, W.;Mastrapasqua, V.;My, S.;Nenna, F.;Nuzzo, S.;Pellecchia, A.;Pompili, A.;Radogna, R.;Simone, F. M.;Stamerra, A.;Troiano, D.;Venditti, R.;Zaza, A.;Tenchini, F.;
2026-01-01
Abstract
Using proton-proton collision data collected by the CMS experiment at √𝑠=13 TeV in 2016–2018, corresponding to an integrated luminosity of 140 fb−1, the first full reconstruction of the three vector B meson states, B*+, B*0 , and Bs*0, is performed. The mass differences between the excited mesons and their corresponding ground states are measured to be m(B*+)−m(B+)=45.277±0.039±0.027 MeV, m(B*0)−m(B0)=45.471±0.056±0.028 MeV, and m(B𝑠*0)−m(B𝑠0)=49.407±0.132±0.041 MeV, where the first uncertainties are statistical and the second are systematic. These results improve on the precision of previous measurements by an order of magnitude.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
