Pre-Critical Phenomena of Two-Flavor Color Superconductivity in Heated Quark Matter: -- Diquark-Pair Fluctuations and Non-Fermi Liquid Behavior -- | Zendy

M. Kitazawa | Zendy; T. Koide | Zendy; T. Kunihiro | Zendy; Y. Nemoto | Zendy

Open Access

Pre-Critical Phenomena of Two-Flavor Color Superconductivity in Heated Quark Matter: -- Diquark-Pair Fluctuations and Non-Fermi Liquid Behavior --

Author(s) -

M. Kitazawa,

T. Koide,

T. Kunihiro,

Y. Nemoto

Publication year - 2005

Publication title -

progress of theoretical physics

Language(s) - English

Resource type - Journals

eISSN - 1347-4081

pISSN - 0033-068X

DOI - 10.1143/ptp.114.117

Subject(s) - diquark , physics , color superconductivity , strange matter , condensed matter physics , fermi liquid theory , quark , observable , quantum chromodynamics , superconductivity , coupling (piping) , fermi gamma ray space telescope , critical phenomena , phase transition , particle physics , quantum mechanics , mechanical engineering , engineering

We investigate the fluctuations of the diquark-pair field and their effectson observables above the critical temperature $T_c$ in two-flavor colorsuperconductivity (CSC) at moderate density using a Nambu-Jona-Lasinio-typeeffective model of QCD. Because of the strong-coupling nature of the dynamics,the fluctuations of the pair field develop a collective mode, which has aprominent strength even well above T_c. We show that the collective mode isactually the soft mode of CSC. We examine the effects of the pair fluctuationson the specific heat and the quark spectrum for T above but close to T_c. Wefind that the specific heat exhibits singular behavior because of the pairfluctuations, in accordance with the general theory of second-order phasetransitions. The quarks display a typical non-Fermi liquid behavior, owing tothe coupling with the soft mode, leading to a pseudo-gap in the density ofstates of the quarks in the vicinity of the critical point. Some experimentalimplications of the precursory phenomena are also discussed.Comment: 39 pages, 26 eps figures. The published version to appear in Prog. Theor. Phys. 114 (2005), 117-155. The references are up-date

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