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Münster 2017 – wissenschaftliches Programm

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SYDI: Symposium Dissertationspreis der Fachverbände GR/T/HK

SYDI 1: GR-HK-T Dissertationspreis

SYDI 1.1: Hauptvortrag

Montag, 27. März 2017, 14:00–14:30, H 1

Probing the formation of structures in strong interactions with heavy quarks — •Matthias Berwein — Tohoku University, Sendai, Japan

One of the most interesting open problems in contemporary physics regards the many phases of strongly interacting matter, in particular the confinement/deconfinement transition. This fascinating phenomenon has far reaching implications, ranging from cosmological and astrophysical questions, like the nature of the quark matter inside neutron stars, to high-energy experiments, with the appearance of the exotic XYZ states, or the formation of a quark-gluon-plasma observed in heavy-ion collisions. Heavy quarks are well suited to probe many different aspects of this very active field of physics.

In my thesis, I am addressing several issues arising in this context, relying on the use of effective field theories (EFTs), symmetries, as well as high-order perturbative calculations and lattice simulations. First, I study the implementation of the Poincare symmetry in so-called non-relativistic EFTs, which are of great importance to describe the dynamics of heavy quarks, leading to exact relations between the parameters of these EFTs. Then I develop a new EFT-based framework for the description of hybrids, gluonic excitations of heavy quark bound states, which clearly shows the relation to the underlying theory of QCD. Finally, I improve the theoretical knowledge of two quantities of great relevance to deconfinement in hot QCD matter, the Polyakov loop and Polyakov loop correlator. These high-level calculations supplemented by EFT arguments finally lead to good agreement with lattice data.

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