Bound diquarks and their Bose–Einstein condensation in strongly coupled quark matter
- 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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| Author: | Masakiyo Kitazawa, Dirk H. RischkeORCiDGND, Ihor Andrijovyč ŠovkovyjORCiDGND |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-763403 |
| DOI: | https://doi.org/10.1016/j.physletb.2008.03.067 |
| ISSN: | 0370-2693 |
| Parent Title (English): | Physics Letters B |
| Publisher: | Elsevier |
| Place of publication: | Amsterdam |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2008/04/07 |
| Date of first Publication: | 2008/04/07 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2023/10/06 |
| Volume: | 663.2008 |
| Issue: | 3 |
| Page Number: | 6 |
| First Page: | 228 |
| Last Page: | 233 |
| HeBIS-PPN: | 512793786 |
| Institutes: | Physik |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - CC BY - Namensnennung 4.0 International |
