Abstract
We consider the quarkonium diffusion, dissociation, and recombination inside quark-gluon plasma. We compute scattering amplitudes in potential nonrelativistic QCD for relevant processes. These processes include the gluon absorption/emission at the order , inelastic scattering at the order , and elastic scattering with medium constituents at the order . We show these amplitudes satisfy the Ward identity. We also consider one-loop corrections. The dipole interaction between the color singlet and octet is not running at the one-loop level. Interference between the tree-level gluon absorption/emission and its thermal loop corrections cancels the collinear divergence in the -channel inelastic scattering. The inelastic scattering has no soft divergence because of the finite binding energy of quarkonium. We write out the diffusion, dissociation, and recombination terms explicitly for a Boltzmann transport equation and define the dissociation and recombination rates. Furthermore, we calculate the diffusion coefficient of quarkonium. We find our result of the diffusion coefficient differs from a previous calculation by 2 to 3 orders of magnitude. We explain this and can reproduce the previous result in a certain limit. Finally, we discuss two mechanisms of quarkonium energy loss inside quark-gluon plasma.
- Received 12 December 2018
DOI:https://doi.org/10.1103/PhysRevD.100.014008
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society