TY  - JOUR
A1  - Kitazawa, Masakiyo
A1  - Rischke, Dirk H.
A1  - Šovkovyj, Ihor Andrijovyč
T1  - Bound diquarks and their Bose–Einstein condensation in strongly coupled quark matter
T2  - Physics Letters B
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.
Y1  - 2008
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/76340
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-763403
SN  - 0370-2693
VL  - 663.2008
IS  - 3
SP  - 228
EP  - 233
PB  - Elsevier
CY  - Amsterdam
ER  -