Mixing and CP Violation in Charm Meson Decays Metadata

Metadata describes a digital item, providing (if known) such information as creator, publisher, contents, size, relationship to other resources, and more. Metadata may also contain "preservation" components that help us to maintain the integrity of digital files over time.


  • Main Title Mixing and CP Violation in Charm Meson Decays


  • Author: Meadows, B
    Creator Type: Personal
  • Author: U., /Cincinnati
    Creator Type: Personal


  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: USDOE


  • Name: SLAC National Accelerator Laboratory
    Place of Publication: [California]


  • Creation: 2010-08-26


  • English


  • Content Description: Mixing and CP violation (CPV ) in the neutral D system were first discussed over thirty years ago but mixing was observed for the first time only very recently. Since then, these observations have been confirmed in other experiments and in other D{sup 0} decay modes. Unlike the K, B and B{sub s} systems, for which mixing was observed years earlier, the short distance ({Delta}C = 2) amplitude contributing to mixing in the D system arises from box diagrams with down- rather than up-type quarks in the loops. The d and s components are GIM-suppressed, and the b component is suppressed by the small V{sub ub} CKM coupling. In the standard model (SM), therefore, long range, non-perturbative effects, a coherent sum over intermediate states accessible to both D{sup 0} and {bar D}{sup 0}, are the main contribution to mixing. These are hard to compute reliably, however. The phenomenon of mixing in neutral meson systems has now been observed in all flavours, but only in the past year in the D{sup 0} system. The standard model anticipated that, for the charm sector, the mixing rate would be small, and also that CP violation, either in mixing or in direct decay, would be below the present levels of observability. It is hoped that further study of these phenomena might reveal signs of new physics. A review of recently available, experimental results is given.
  • Physical Description: 7 pages


  • Keyword: Decay
  • Keyword: Amplitudes
  • Keyword: Experiment-Hep,Hepex
  • Keyword: Quarks
  • Keyword: Standard Model Experiment-Hep,Hepex
  • Keyword: Mesons
  • STI Subject Categories: 71 Classical And Quantum Mechanics, General Physics
  • Keyword: Physics
  • STI Subject Categories: 72 Physics Of Elementary Particles And Fields
  • Keyword: High Energy Physics


  • Conference: Invited talk at 34th International Conference on High Energy Physics (ICHEP 2008), Philadelphia, Pennsylvania, 30 Jul - 5 Aug 2008


  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article


  • Text


  • Report No.: SLAC-PUB-13450
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 992466
  • Archival Resource Key: ark:/67531/metadc1015050


  • Display Note: http://www.slac.stanford.edu/cgi-wrap/pubpage?slac-pub-13450.html