Speaker
Dr
Alexander Rothkopf
(Institute for Theoretical Physics, Heidelberg University)
Description
Heavy quarkonium presents a unique probe of the quark-gluon plasma produced in relativistic heavy-ion collisions. While Bottomonium is expected to act as a test particle traversing the medium in the collision center, recent measurements of finite J/ψ flow by the ALICE collaboration hint at the participation of the charm quarks in the collectivity of the bulk.
Here we present our recent results on the in-medium properties of kinetically thermalized heavy quarkonium using effective field theories in combination with lattice QCD. We contrast the computation of spectral functions from a direct lattice effective field theory approach, called NRQCD [1] with an indirect one via the complex real-time potential extracted from Wilson line correlators on the lattice [2]. Consequences for phenomenology, e.g. for the J/ψ / ψ' ratio [3], as well as χc(nP) feed-down [4] are discussed.
[1] see e.g. S.Kim, P.Petreczky, A.R. (in preparation), 1512.05289 and Phys.Rev. D91 (2015) 054511
[2] Y. Burnier, O.Kaczmarek, A.R. PRL 114 (2015) 082001
[3] Y. Burnier, O.Kaczmarek, A.R. JHEP 1512 (2015) 101
[4] Y. Burnier, O.Kaczmarek, A.R. JHEP 1610 (2016) 032
Primary author
Dr
Alexander Rothkopf
(Institute for Theoretical Physics, Heidelberg University)
