The OZI Rule in Meson Decay

This Demonstration shows the OZI rule applied in the decay of one meson into two. This rule determines which strong processes are preferred and which are allowed but strongly suppressed. Selecting different initial and final quark flavors will display the appropriate diagram.


  • [Snapshot]
  • [Snapshot]
  • [Snapshot]


The OZI rule is an experimentally observed characteristic of strong interaction. It was first published independently by Okubo, Zweig and Iizuka in the 1960s (hence the name OZI). The rule can be summarized as follows: "Decays that correspond to disconnected quark diagrams are forbidden". Due to other physical properties of particles (such as "ideal mixing"), such processes are not completely forbidden, only very strongly suppressed. For example, the meson decay into strange mesons is preferred rather then decay into non-strange mesons or .
For more information about the OZI rule, see for example: Fayyazuddin and Riazuddin, A Modern Introduction to Particle Physics, 2nd ed., Singapore: World Scientific, 2000 p. 177.
    • Share:

Embed Interactive Demonstration New!

Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site. More details »

Files require Wolfram CDF Player or Mathematica.

Mathematica »
The #1 tool for creating Demonstrations
and anything technical.
Wolfram|Alpha »
Explore anything with the first
computational knowledge engine.
MathWorld »
The web's most extensive
mathematics resource.
Course Assistant Apps »
An app for every course—
right in the palm of your hand.
Wolfram Blog »
Read our views on math,
science, and technology.
Computable Document Format »
The format that makes Demonstrations
(and any information) easy to share and
interact with.
STEM Initiative »
Programs & resources for
educators, schools & students.
Computerbasedmath.org »
Join the initiative for modernizing
math education.
Step-by-Step Solutions »
Walk through homework problems one step at a time, with hints to help along the way.
Wolfram Problem Generator »
Unlimited random practice problems and answers with built-in step-by-step solutions. Practice online or make a printable study sheet.
Wolfram Language »
Knowledge-based programming for everyone.
Powered by Wolfram Mathematica © 2018 Wolfram Demonstrations Project & Contributors  |  Terms of Use  |  Privacy Policy  |  RSS Give us your feedback
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to Mathematica Player 7EX
I already have Mathematica Player or Mathematica 7+