TY  - JOUR
A1  - Buballa, Michael
A1  - Neumann, Frederik
A1  - Oertel, Micaela
A1  - Šovkovyj, Ihor Andrijovyč
T1  - Quark mass effects on the stability of hybrid stars
T2  - Physics Letters B
N2  - We perform a study of the possible existence of hybrid stars with color superconducting quark cores using a specific hadronic model in a combination with an NJL-type quark model. It is shown that the constituent mass of the non-strange quarks in vacuum is a very important parameter that controls the beginning of the hadron–quark phase transition. At relatively small values of the mass, the first quark phase that appears is the two-flavor color superconducting (2SC) phase which, at larger densities, is replaced by the color-flavor locked (CFL) phase. At large values of the mass, on the other hand, the phase transition goes from the hadronic phase directly into the CFL phase avoiding the 2SC phase. It appears, however, that the only stable hybrid stars obtained are those with the 2SC quark cores.
Y1  - 2004
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/76157
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-761571
SN  - 0370-2693
VL  - 595
IS  - 1
SP  - 36
EP  - 43
PB  - Elsevier
CY  - Amsterdam
ER  -