English

Flavour Dynamics & \cp Violation in the Standard Model: A Crucial Past -- and an Essential Future

High Energy Physics - Phenomenology 2007-05-23 v1

Abstract

Our knowledge of flavour dynamics has undergone a `quantum jump' since just before the turn of the millenium: direct \cp violation has been firmly {\em established} in KLππK_L \to \pi \pi decays in 1999; the first \cp asymmetry outside KLK_L decays has been discovered in 2001 in BdψKSB_d \to \psi K_S, followed by Bdπ+πB_d \to \pi^+\pi^-, ηKS\eta^{\prime}K_S and BK±πB \to K^{\pm}\pi^{\mp}, the last one establishing direct \cp violation also in the beauty sector.Furthermore CKM dynamics allows a description of \cp insensitive and sensitive BB, KK and DD transitions that is impressively consistent also on the quantitative level. Theories of flavour dynamics that could serve as {\em alternatives} to CKM have been ruled out. Yet these novel successes of the Standard Model (SM) do not invalidate any of the theoretical arguments for the incompleteness of the SM. In addition we have also more direct evidence for New Physics, namely neutrino oscillations, the observed baryon number of the Universe, dark matter and dark energy. While the New Physics anticipated at the TeV scale is not likely to shed any light on the SM's mysteries of flavour, detailed and comprehensive studies of heavy flavour transitions will be essential in diagnosing salient features of that New Physics. Strategic principles for such studies will be outlined.

Keywords

Cite

@article{arxiv.hep-ph/0701273,
  title  = {Flavour Dynamics & \cp Violation in the Standard Model: A Crucial Past -- and an Essential Future},
  author = {I. I. Bigi},
  journal= {arXiv preprint arXiv:hep-ph/0701273},
  year   = {2007}
}

Comments

83 pages, 8 figures; lectures given at the 2006 CERN Summer School of High Energy Physics; Aronsborg, Sweden