Phase diagram of two-color quark matter at nonzero baryon and isospin density

0346583 - ÚJF 2011 RIV US eng J - Článek v odborném periodiku
Andersen, J. O. - Brauner, Tomáš
Phase diagram of two-color quark matter at nonzero baryon and isospin density.
Physical Review. D. Roč. 81, č. 9 (2010), 096004/1-096004/14. ISSN 0556-2821
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: COLOR SUPERCONDUCTIVITY * QUANTUM CHROMODYNAMICS * PERTURBATION-THEORY
Kód oboru RIV: BE - Teoretická fyzika

We investigate the properties of cold dense quark matter composed of two colors and two flavors of light quarks. In particular, we perform the first model calculation of the full phase diagram at nonzero baryon and isospin density, thus matching the model-independent predictions of chiral perturbation theory at low density to the conjectured phase structure at high density. We confirm the presence of the Fulde-Ferrell phase in the phase diagram and study its dependence on the tunable parameter in the Lagrangian that simulates the effects of the quantum axial anomaly. As a by-product, we clarify the calculation of the thermodynamic potential in the presence of the Fulde-Ferrell pairing, which was previously based on an ad hoc subtraction of an unphysical cutoff artifact.
Trvalý link: http://hdl.handle.net/11104/0187577