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$eta_c$-nucleus bound state energies are calculated for various nuclei. Essential input for the calculations, namely the medium-modified $D$ and $D^{*}$ meson masses, as well as the density distributions in nuclei, are calculated within the quark-meson coupling (QMC) model. The attractive potentials for the $eta_c$ meson in the nuclear medium originate from the in-medium enhanced $DD^{*}$ loops in the $eta_c$ self-energy. Our results suggest that the $eta_c$ meson should form bound states with all the nuclei considered.
Quarkonium-nucleus systems are composed of two interacting hadronic states without common valence quarks, which interact primarily through multi-gluon exchanges, realizing a color van der Waals force. We present lattice QCD calculations of the intera
In this paper, we investigate the inclusive diffractive hadroproduction for $rm eta_{c}$ and $rm eta_{b}$ at the LHC energies. Based on the NRQCD factorization formalism and the resolved-Pomeron model for the quarkonium production mechanism, we estim
Using a data sample of $2.25times10^{8}$ $J/psi$ events collected with the BESIII detector, we present the first observation of the decays of $eta_{c}$ mesons to $Sigma^{+}bar{Sigma}^{-}$ and $Xi^{-}bar{Xi}^{+}$. The branching fractions are measured
This note complements and clarifies the results obtained in the original paper {it QCD Parameters Correlations from Heavy Quarkonia} [1] where, here, we present a more detailed discussion of the alpha_s-results obtained @ N2LO at two different subtra
A study of $B^{0}_{s} to eta_{c} phi$ and $B^{0}_{s} to eta_{c} pi^{+}pi^{-}$ decays is performed using $pp$ collision data corresponding to an integrated luminosity of 3.0$,rm fb^{-1}$, collected with the LHCb detector in Run~1 of the LHC. The obser