The Relation between Fundamental Constants and Particle Physics Parameters

The Relation between Fundamental Constants and Particle Physics Parameters

The observed constraints on the variability of the proton to electron mass ratio μ and the fine structure constant α are used to establish constraints on the variability of the Quantum Chromodynamic Scale and a combination of the Higgs Vacuum Expectation Value and the Yukawa couplings. Further model dependent assumptions provide constraints on the Higgs VEV and the Yukawa couplings separately. ...

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...

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 and their Time Dependence

We discuss the fundamental constants in the Standard Model of particle physics, in particular possible changes of these constants on the cosmological time scale. The Grand Unification of the observed strong, electromagnetic and weak interactions implies relations between time variations of the finestructure constant α and the QCD scale Λc. The astrophysical observation of a variation of α impli...

Physics Today Pilgrims' progress in search of the fundamental constants