Speaker
Dr
Alessandra Fanfani
(University and INFN Bologna)
Description
Using large data samples of di-muon events, CMS has performed detailed measurements in the field of exotic quarkonium production. We will present very recent result on the X(3872) exotic state, in the J/psi pi pi decay channel, based on ~6500 events, collected at sqrt(s) = 7 TeV, and covering unprecedentedly high values of pT. The cross-section ratio w.r.t. the psi(2S) will be given differentially in pT, as well as pT integrated. For the first time at the LHC the fraction of X(3872) coming from B hadron decays has been established. We finish with a measurement of the di-pion mass spectrum to establish details of the nature of the decay. Having opened the field for studies on exotic quarkonium, we will report detailed measurements from one more exotic state.
Primary author
Dr
Alessandra Fanfani
(University and INFN Bologna)
