The fine-tuning problems of particle physics and anthropic mechanisms
arXiv:0710.4080
Abstract
Many of the classic problems of particle physics appear in a very different light when viewed from the perspective of the multiverse. Most importantly the two great ``fine tuning'' problems that motivate the field are far less serious when one accounts for the required anthropic constraints which exist in a multiverse. However, the challenge then becomes to construct a realistic physical theory of the multiverse and test it. I describe some phenomenology of the quark and lepton masses that may provide a window to the theory that underlies the multiverse.
This is a chapter in the book "Universe or Multiverse" ed. by Bernard Carr pp 231-246 (Cambridge University Press). It was written about 2 years ago and I have now updated a few references and other minor changes
References in corpus (15)
- Quantization of Four-form Fluxes and Dynamical Neutralization of the Cosmological Constant
- The statistics of string/M theory vacua
- The Anthropic Landscape of String Theory
- Inflation and Eternal Inflation
- The anthropic principle and the mass scale of the Standard Model
- Why the Universe is Just So
- On likely values of the cosmological constant
- Solutions to the cosmological constant problems
- Anthropic considerations in multiple domain theories and the scale of electroweak symmetry breaking
- On Anthropic Solutions of the Cosmological Constant Problem
- Standard Model Parameters and the Cosmological Constant
- Quark and lepton masses and mixing in the landscape
- Towards a theory of quark masses, mixings and CP-violation
- Theories of the Cosmological Constant
- The weight for random quark masses