Glueballs and the superfluid phase of Two-Color QCD

Abstract

We present the first results on scalar glueballs in cold, dense matter using lattice simulations of two color QCD. The simulations are carried out on a $6^3\times 12$ lattice and use a standard hybrid molecular dynamics algorithm for staggered fermions for two values of quark mass. The glueball correlators are evaluated via a multi-step smearing procedure. The amplitude of the glueball correlator peaks in correspondence with the zero temperature chiral transition, ${\mu }_c=m_{\pi }/2$, and the propagators change in a significant way in the superfluid phase, while the Polyakov loop is mearly insensitive to the transition. Standard analysis suggest that lowest mass in the $0^{++}$ gluonic channel decreases in the superfluid phase, but these observations need to be confirmed on larger and more elongated lattices These results indicate that a nonzero density induces nontrivial modifications of the gluonic medium.

26 pages, 13 figures; discussions and one figure added; to appear in EPJC

References in corpus (6)

• Deconfinement in dense 2-color QCD
• Behaviour of the topological susceptibility in two colour QCD across the finite density transition
• Phase-diagram of two-color lattice QCD in the chiral limit
• Confining properties of QCD at finite temperature and density
• Vacuum Energy, EoS, and the Gluon Condensate at Finite Baryon Density in QCD
• Random Matrix Theory at Nonzero $\mu$ and $T$

Cited by in corpus (3)

• Phase Transitions in Particle Physics -- Results and Perspectives from Lattice Quantum Chromo-Dynamics
• Lattice Study of Dense Matter with Two Colors and Four Flavors
• Finite-Density Massless Two-Color QCD at Isospin Roberge-Weiss Point and 't Hooft Anomaly