Stable strange quark matter objects with running masses and coupling constant
Cheng-Jun Xia (CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, China, School of Information Science and Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo, 315100, China); Shan-Gui Zhou (CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, China, School of Physics, University of Chinese Academy of Sciences, Beijing, 100049, China, Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, China, Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou, 730000, China)
We improve our recently proposed unified description for strange quark matter (SQM) objects, in the way that analytical expressions are derived and used to calculate the distribution of particles inside an SQM object. In the improved model, the computational time is greatly reduced without losing accuracy. The properties of SQM objects are then investigated by adopting perturbative quantum chromodynamics (pQCD) with running quark masses and coupling constant. Aside from the increase of masses and radii of strange stars, it is found that the perturbative interactions also make the electric field on the surface stronger and extends deeper into the core, while small SQM objects become less compact and more positively charged. These may affect the experimental searches of SQM.
