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Testing new indirect CP violation.

Yuval Grossman1, Yosef Nir, Gilad Perez

  • 1Institute for High Energy Phenomenology, Newman Laboratory of Elementary Particle Physics, Cornell University, Ithaca, New York 14853, USA.

Physical Review Letters
|October 2, 2009
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Summary
This summary is machine-generated.

A new model-independent relation links four key observables in neutral meson mixing. This finding, tested in K mesons and predicted for B(s) and D systems, probes new physics responsible for CP violation.

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Area of Science:

  • Particle Physics
  • High Energy Physics
  • Quantum Mechanics

Background:

  • Neutral meson systems exhibit CP violation, a phenomenon not fully explained by the Standard Model.
  • CP violation in decay amplitudes and meson mixing are distinct processes that can be influenced by new physics.
  • A model-independent relation between mixing observables could provide a powerful tool to probe new CP-violating physics.

Purpose of the Study:

  • To establish and test a model-independent relation between four observables in neutral meson mixing.
  • To investigate the implications of this relation for CP violation in K, B(s), and D meson systems.
  • To use this relation as a probe for new physics beyond the Standard Model contributing to CP violation.

Main Methods:

  • Derivation of a model-independent relation: y tan(phi) ≈ x(1 - |q/p|), where x and y are mass and width splittings, and phi and |q/p| relate to CP violation.
  • Testing the relation using existing experimental data for the K meson system.
  • Providing new predictions for the B(s) and D meson systems based on the derived relation.

Main Results:

  • The established relation y tan(phi) ≈ x(1 - |q/p|) holds with excellent accuracy for the K meson system.
  • The relation provides a stringent test for new physics contributions to CP violation in neutral meson mixing.
  • New predictions are generated for the B(s) and D systems, which can be experimentally verified.

Conclusions:

  • The model-independent relation is a successful tool for analyzing CP violation in neutral meson systems.
  • Experimental verification of this relation in B(s) and D systems will constrain or reveal new sources of CP violation.
  • The study highlights the importance of precise measurements of mixing observables to probe fundamental physics.