Fundamental constants and their variability in theories of High Energy Physics
arXiv:0802.1725 · doi:10.1140/epjst/e2008-00826-4
Abstract
The Standard Model of particle physics and the theory of General Relativity (GR) currently provide a good description of almost all phenomena of particle physics and gravitation that have received controlled experimental tests. However, the Standard Model contains many a priori variable parameters whose values, and whose apparent (near-)constancy, have yet to receive a convincing theoretical explanation. At the same time, GR may now require to be extended or altered at the largest length scales, to account for the recent apparent accelerated cosmological expansion. In this introductory review I present theoretical aspects of the search for explanations of the values and possible variations of fundamental ``constants'', focusing on the possibility of unification of interactions. I also relate cosmological variations to modifications of gravity both locally and cosmologically.
17 pages pdflatex, proceedings of introductory lecture for ACFC Seminar, Bad Honnef 2007, to be published in EPJ Special Topics
References in corpus (9)
- Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
- Test of the Equivalence Principle Using a Rotating Torsion Balance
- Environmental Dependence of Masses and Coupling Constants
- Quantum Physics Exploring Gravity in the Outer Solar System: The Sagas Project
- Primordial nucleosynthesis as a probe of fundamental physics parameters
- Variability of the proton-to-electron mass ratio on cosmological scales
- Variation of fundamental constants in space and time: theory and observations
- Tests of Relativistic Gravity in Space: Recent Progress and Future Directions
- Detecting Seasonal Changes in the Fundamental Constants