CP VIOLATION.

1
CP VIOLATION.

• Baryon number (B)
• Equal to 1 for a quark and -1 for an antiquark.
  
• Conserved
• Pair production Net B 0 before and after.
• but not exactly conserved.
• CP violationfirst observed in 1964.
• Antiquarks very rarely become quarks (but not
  vice versa).
• Cosmology. (Andrei Sakharov-1967).
• Asymmetry occurs at an early stage of the Big
  Bang.
• Theory predictions range from 10-4 to 10-12
• Most quarks annihilate, but a very few find no
  partners.