# XQCD 2019 (The 17th International Conference on QCD in Extreme Conditions)

24-26 June 2019
Bunkyo School Building, Tokyo Campus, University of Tsukuba
Japan timezone

## Real-Time-Evolution of Heavy-Quarkonium Bound States

25 Jun 2019, 17:05
25m
134 (Bunkyo School Building, Tokyo Campus, University of Tsukuba)

### 134

#### Bunkyo School Building, Tokyo Campus, University of Tsukuba

3-29-1 Otsuka Bunkyo-ku Tokyo 112-0012 Japan
Oral talk

### Speaker

Mr Alexander Lehmann (Heidelberg University and University of Stavanger)

### Description

Elucidating the production process of heavy quark bound states is a central goal in heavy-ion collisions [1]. Two central questions exist: Do bound states of heavy quarks form in the early time evolution of the glasma? If so, in which time regime can that happen? An answer requires the development of a non-perturbative treatment of the real-time-dynamics of heavy quarkonia. To answer those questions we have developed a novel real-time formulation [2] of lattice NRQCD [3,4] to order $1/(aMq)^2$ where we employ a classical statistical simulation for the early-time dynamics of the gauge fields [5]. Here we present results from a simulation of heavy quarkonium dynamics in the glasma. By computing the time-evolution of spectral functions of heavy quarkonium channels we expect to identify the emergence of bound states and their formation time in the evolving glasma. [1] G. Aarts et al., Eur. Phys. J. A 53 no.5, 93 (2017) [2] A. L., A. Rothkopf (in preparation) [3] G.P. Lepage et al., Phys.Rev. D 46, 4052 (1992) [4] M. Berwein, N. Brambilla, S. Hwang, A. Vairo, TUM-EFT 74/15, 56 pp (2018) [5] K. Boguslasvki, A. Kurkela, T. Lappi, J. Peuron, Phys.Rev. D98 no.1, 014006 (2018)

### Primary author

Mr Alexander Lehmann (Heidelberg University and University of Stavanger)

 Slides