Spin-dependent interaction in the deconfined phase of QCD

TL;DR

This paper derives spin-dependent interactions in the deconfined phase of QCD from field correlators, calculating hyperfine splittings for various quarkonia and discussing their impact on quark-gluon plasma thermodynamics.

Contribution

It introduces a derivation of spin-dependent interactions in the deconfined QCD phase from lattice and analytic field correlators, providing numerical hyperfine splittings.

Findings

Hyperfine splittings for charmonium, bottomonium, and strangeonium are computed.

Magnetic correlator-induced spin-orbit interactions can produce numerous bound states.

Discussion on the potential impact of these effects on quark-gluon plasma thermodynamics.

Abstract

Spin-dependent deconfined interaction in the Q\barQ system is derived from the field correlators known from lattice and analytic calculations. As a result hyperfine splitting is found numerically for charmonium, bottomonium and strangeonium in the range T_c<T<2T_c. Spin-orbit interaction due to magnetic correlators (the Thomas term) is able to produce numerous Q\barQ bound states with accumulation point at M=m_Q+m_\barQ. Possible influence of these effects on the thermodynamics of quark-gluon plasma is discussed.