期刊
EUROPEAN PHYSICAL JOURNAL C
卷 58, 期 1, 页码 69-81出版社
SPRINGER
DOI: 10.1140/epjc/s10052-008-0718-z
关键词
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资金
- D.o.E Institute for Nuclear Theory at the University of Washington
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 63x12 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 nearly 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 non-zero density induces non-trivial modifications of the gluonic medium.
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