The Dimensionless Constants of Physics

The fundamental constants of physics

A natural system of fundamental physical units c, fi, and wp is discussed, where с is the velocity of light, a is Planck's constant, and mv is the Planck mass, which is related to the Newtonian gravitational constant by the equation m\ = fic/G. In a natural system of units, such questions as: "How does the anthropic nature of the physical universe arise? Is it unique, or does an infinite set of...

The Fundamental Constants in Physics

We discuss the fundamental constants of Physics in the Standard Model and possible changes of these constants on the cosmological time scale. The Grand Unification of the strong, electromagnetic and weak interactions implies relations between the time variation of the finestructure constant α and of the QCD scale Λc. A change of α by 10 −15 / year, as seen by an astrophysics experiment, implies...

Fermi Constants and “New Physics”

Various precision determinations of the Fermi constant are compared. Included are muon and (leptonic) tau decays as well as indirect prescriptions employing α, mZ , mW , sin θW (mZ)MS , Γ(Z → `+`−), and Γ(Z → νν̄) as input. Their good agreement tests the standard model at the ±0.1% level and provides stringent constraints on new physics. That utility is illustrated for: heavy neutrino mixing, 2 ...

Title: Dimensionless Constants of the Fundamental Physical Interactions Viewed by the Model of Expansive Nondecelerative Universe Dimensionless Constants of the Fundamental Physical Interactions Viewed by the Model of Expansive Nondecelerative Universe

A profound relationship between the ENU (Expansive Nondecelerative Universe) and dimensionless constants of the fundamental physical interactions is presented. The contribution corrects the Dirac presumption on a time decrease of the gravitational constant G and using simple relations it precises the values of the vector bosons x and y. There is no problem in defining dimensionless physical con...

Physics Today Pilgrims' progress in search of the fundamental constants