Deconfinement in dense 2-color QCD
| dc.creator | Hands, Simon | |
| dc.creator | Kim, Seyong | |
| dc.creator | Skullerud, Jon-Ivar | |
| dc.date | 2006-04-04 | |
| dc.date | 2006-06-26 | |
| dc.date.accessioned | 2026-07-07T12:24:58Z | |
| dc.date.available | 2026-07-07T12:24:58Z | |
| dc.description | We study SU(2) lattice gauge theory with two flavors of Wilson fermion at non-zero chemical potential mu and low temperature on a 8^3x16 system. We identify three regimes along the mu-axis. For mu<~m_pi/2 the system remains in the vacuum phase, and all physical observables considered remain essentially unchanged. The intermediate regime is characterised by a non-zero diquark condensate and an associated increase in the baryon density, consistent with what is expected for Bose-Einstein condensation of tightly bound diquarks. We also observe screening of the static quark potential here. In the high-density deconfined regime we find a non-zero Polyakov loop and a strong modification of the gluon propagator, including significant screening in the magnetic sector in the static limit, which must have a non-perturbative origin. The behaviour of thermodynamic observables and the superfluid order parameter are consistent with a Fermi surface disrupted by a BCS diquark condensate. The energy per baryon as a function of mu exhibits a minimum in the deconfined regime, implying that macroscopic objects such as stars formed in this theory are largely composed of quark matter. | |
| dc.description | 15 pages, 23 figures, uses svjour.cls. Added a subsection on the approach to saturation; some minor modifications and added references. To be published in Eur.Phys.J.C | |
| dc.identifier | https://arxiv.org/abs/hep-lat/0604004 | |
| dc.identifier | http://arxiv.org/abs/hep-lat/0604004 | |
| dc.identifier | Eur.Phys.J.C48:193,2006 | |
| dc.identifier | doi:10.1140/epjc/s2006-02621-8 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/214488 | |
| dc.subject | High Energy Physics - Lattice | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Nuclear Theory | |
| dc.title | Deconfinement in dense 2-color QCD | |
| dc.type | text |