In-medium modifications of open and hidden strange-charm mesons from spatial correlation functions

Abstract

We calculate spatial correlation functions of in-medium mesons consisting of strange-anti-strange, strange-anti-charm and charm-anti-charm quarks in (2+1)-flavor lattice QCD using the highly improved staggered quark action. A comparative study of the in-medium modifications of mesons with different flavor contents is performed. We observe significant in-medium modifications for the φ and Ds meson channels already at temperatures around the chiral crossover region. On the other hand, for the J/ψ and ηc meson channels in-medium modifications remain relatively small around the chiral crossover region and become significant only above 1.3 times the chiral crossover temperature.

Quarkonium at finite temperature: towards realistic phenomenology from first principles

“…Note that most of these studies were performed in the quenched approximation or at rather large values of the light quark masses and so far no continuum extrapolation was performed. Results of spatial correlation functions and the corresponding spatial screening masses from lattice calculations in the charmoniun sector that include dynamical light quarks further support our findings [87,88]. Relativistic charmonium and bottomonium correlation functions computed in quenched QCD [86] have also shown that in the bottomonium channel thermal modifications set in at larger temperatures, well in the QGP phase, compared to the charmonium channel.…”

Quark masses and strong coupling constant in2+1flavor QCD

“…Thus, the value of the light quark masses are slightly larger than the physical value. This small difference , however, does not lead to any visible effects in the physical observables at zero temperature, which agree well with the experimental values [21,22]. For the valence charm and bottom quarks we use the HISQ action with the so-called ǫ-term [20], which removes the tree-level discretization effects due to the large quark mass up to O((am) 4 ).…”

“…For the valence charm and bottom quarks we use the HISQ action with the so-called ǫ-term [20], which removes the tree-level discretization effects due to the large quark mass up to O((am) 4 ). The HISQ action with ǫ-term turned out to be very effective for treating the charm quark on the lattice [16,20,22,23]. The lattice spacing in our calculations has been fixed using r 1 scale defined in terms of the energy of static quark anti-quark pair V(r) as…”

Thermodynamics of strong-interaction matter from lattice QCD

“…245 The horizontal solid lines denote the corresponding zero-temperature meson masses and the dashed line depicts the non-interacting theory limit of a freely propagating quark anti-quark pair. The yellow band denotes the chiral crossover temperature region, i.e.…”