Conveners
Parallel 11: heavy quarkonia in medium
- Taku Gunji (University of Tokyo (JP))
Charmonia are a valuable tool to investigate nuclear matter under extreme conditions, and particularly the strongly interacting medium formed in heavy-ion collisions. At the LHC energies, the regeneration process has been found to significantly impact the observed charmonium yields. In particular, the measurement of $\psi(2S)$ production relative to $J/\psi$ in Pb-Pb collisions has a strong...
Modifications of quarkonia production in hadronic collisions provide an im-
portant experimental observable to probe the heavy quark interaction with the
nuclear medium. The excited ψ(2S) state, with a relatively low binding en-
ergy, is especially sensitive to these effects. In this contribution, we will present
a new LHCb result on ψ(2s)/J/ψ production in PbPb collisions, along...
In relativistic heavy-ion collisions, the dissociation of charmonium is considered an important evidence for the formation of the quark-gluon plasma (QGP). However, charmonia also experience the regeneration effect in the QGP, which acts against the dissociation process. With decreasing collision energy, the regeneration effect decreases quickly, providing leverage to disentangle the two...
Quarkonium production in high-energy hadronic collisions is sensitive to both perturbative and non-perturbative aspects of QCD calculations. The charmonium production cross section can be split into prompt and non-prompt components, the first corresponding to a direct production of charm (anticharm) quarks, the second originating from the decay of beauty hadrons. The latter is important to...
