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P. Nath and R. L. Arnowitt, “U(1) Problem: Current Algebra and the θ Vacuum,” Physical Review D, Vol. 23, No. 2, 1981, pp. 473-476.

has been cited by the following article:

• TITLE: Prediction of Cosmological Constant Λ in Veneziano Ghost Theory of QCD

  AUTHORS: Lijuan Zhou, Weixing Ma, Leonard S. Kisslinger

  KEYWORDS: Cosmological Constant ; Veneziano Ghost Theory of QCD; Local Quark Vacuum Condensate; Nonlocal Quark Condensate; Quantum Chromodynamics-QCD

  JOURNAL NAME: Journal of Modern Physics, Vol.3 No.9A, September 28, 2012

  ABSTRACT: Based on the Veneziano ghost theory of QCD, we estimate the cosmological constant Λ, which is related to the vacuum energy density, , by =8πG . In the recent Veneziano ghost theory is given by the absolute value of the product of the local quark condensate and quark current mass: =(2NfH/m)*c|mq|.By solving Dyson-Schwinger Equations for a dressed quark propagator, we found the local quark condensate ; -(235 MeV)3, the generally accepted value. The quark current mass is mq 4.0 Mev. This gives the same result for as found by previous authors, which is somewhat larger than the observed value. However, when we make use of the nonlocal quark condensate, =g(x), with g(x) estimated from our previous work, we find Λ is in a good agreement with the observations.