Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
; CCAST, World Lab, Beijing 100080, Peoples R China
; Chinese Acad Sci, Inst Modern Phys, Natl Lab Heavy Ion Accelerator, Res Ctr Nucl Theory, Lanzhou 730000, Peoples R China
; Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
We derive a set of relaxation equations describing the chemical equilibration of gluons, quarks, and s quarks at finite baryon density based on JUttner distribution of partons, and investigate strangeness production, chemical equilibration, and evolution. We find that strangeness production depends sensitively on initial values, furthermore, the increase of the quark phase lifetime with increasing initial quark chemical potential obviously heightens strangeness production. In addition, the obvious difference between the calculated strangeness and the one in the thermodynamic equilibrium system shows that the study of strangeness in the chemically equilibrating system is very significant.