TY - JOUR
T1 - Bound diquarks and their Bose-Einstein condensation in strongly coupled quark matter
AU - Kitazawa, Masakiyo
AU - Rischke, Dirk H.
AU - Shovkovy, Igor A.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2008/5/22
Y1 - 2008/5/22
N2 - We explore the formation of diquark bound states and their Bose-Einstein condensation (BEC) in the phase diagram of three-flavor quark matter at nonzero temperature, T, and quark chemical potential, μ. Using a quark model with a four-fermion interaction, we identify diquark excitations as poles of the microscopically computed diquark propagator. The quark masses are obtained by solving a dynamical equation for the chiral condensate and are found to determine the stability of the diquark excitations. The stability of diquark excitations is investigated in the T - μ plane for different values of the diquark coupling strength. We find that diquark bound states appear at small quark chemical potentials and at intermediate coupling strengths. Bose-Einstein condensation of non-strange diquark states occurs when the attractive interaction between quarks is sufficiently strong.
AB - We explore the formation of diquark bound states and their Bose-Einstein condensation (BEC) in the phase diagram of three-flavor quark matter at nonzero temperature, T, and quark chemical potential, μ. Using a quark model with a four-fermion interaction, we identify diquark excitations as poles of the microscopically computed diquark propagator. The quark masses are obtained by solving a dynamical equation for the chiral condensate and are found to determine the stability of the diquark excitations. The stability of diquark excitations is investigated in the T - μ plane for different values of the diquark coupling strength. We find that diquark bound states appear at small quark chemical potentials and at intermediate coupling strengths. Bose-Einstein condensation of non-strange diquark states occurs when the attractive interaction between quarks is sufficiently strong.
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U2 - 10.1016/j.physletb.2008.03.067
DO - 10.1016/j.physletb.2008.03.067
M3 - Article
AN - SCOPUS:43049135191
VL - 663
SP - 228
EP - 233
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 3
ER -