%A Wei-Xing Ma, Li-Juan Zhou, Tong-Quan Yuan, Jin-Song Peng, Xiao Lu, Ji-Huan Pan, Guang-Xiong Peng, Cheng-Ju Meng
%T Theoretical prediction of cosmological constant Λ in Veneziano ghost theory of QCD
%0 Journal Article
%D 2012
%J Front. Phys.
%J Frontiers of Physics
%@ 2095-0462
%R 10.1007/s11467-012-0265-9
%P 471-480
%V 7
%N 4
%U {https://journal.hep.com.cn/fop/EN/10.1007/s11467-012-0265-9
%8 2012-08-01
%X Based on the Veneziano ghost theory of QCD, we predict the cosmological constant Λ, which is related to energy density of cosmological vacuum by Λ=8πG3ρΛ. In the Veneziano ghost theory, the vacuum energy density ρΛ is expressed by absolute value of the product of quark vacuum condensate and quark current mass: ρΛ=2NfHmη'c|mq?0|∶q ˉq∶|0?|. We calculate the quark local vacuum condensates ?0|∶q ˉq∶|0? by solving Dyson–Schwinger Equations for a fully dressed confining quark propagator Sf(p) with an effective gluon propagator Gμνab(q). The quark current mass mq is predicted by use of chiral perturbation theory. Our theoretical result of Λ, with the resulting ?0|∶q ˉq∶|0?=-(235 MeV)3 and light quark current mass mq mq?3.29-6.15 MeV is in a good agreement with the observable of the Λ≈10-52 m-2 used widely in a great amount of literatures.