Color superconductivity from the chiral quark–meson model
- We study the two-flavor color superconductivity of low-temperature quark matter in the vicinity of chiral phase transition in the quark–meson model where the interactions between quarks are generated by pion and sigma exchanges. Starting from the Nambu–Gorkov propagator in real-time formulation we obtain finite temperature (real axis) Eliashberg-type equations for the quark self-energies (gap functions) in terms of the in-medium spectral function of mesons. Exact numerical solutions of the coupled nonlinear integral equations for the real and imaginary parts of the gap function are obtained in the zero temperature limit using a model input spectral function. We find that these components of the gap display a complicated structure with the real part being strongly suppressed above , 2Δ0 where Δ0 is its on-shell value. We find Δ0 ≈ 40 MeV close to the chiral phase transition.
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| Author: | Armen SedrakianORCiDGND, Ralf-Arno TripoltORCiDGND, Jochen WambachORCiDGND |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-546779 |
| DOI: | https://doi.org/10.1016/j.physletb.2018.03.056 |
| ISSN: | 1873-2445 |
| ISSN: | 0370-2693 |
| Parent Title (English): | Physics Letters B |
| Publisher: | Elsevier |
| Place of publication: | Amsterdam [u.a.] |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2018/03/22 |
| Date of first Publication: | 2018/03/22 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2020/05/14 |
| Tag: | Color superconductivity; Models of QCD; Phase diagram of dense matter |
| Volume: | 780.2018 |
| Page Number: | 4 |
| First Page: | 627 |
| Last Page: | 630 |
| HeBIS-PPN: | 465584322 |
| Institutes: | Physik / Physik |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - Namensnennung 4.0 |
