Behavior of Neutral Particles under Charge Conjugation

Abstract

Some properties are discussed of the 8', a heavy boson that is known to decay by the process 0'~m.++21.. According to certain schemes proposed for the interpretation of hyperons and E particles, the 8' possesses an antiparticle 8 distinct from itself. Some theoretical implications of this situation are discussed with special reference to charge conjugation invariance. The application of such invariance in familiar instances is surveyed in Sec. I. It is then shown in Sec. II that, within the framework of the tentative schemes under consideration, the 8' must be considered as a "particle mixture" exhibiting two distinct lifetimes, that each lifetime is associated with a diferent set of decay modes, and that no more than half of all 0"s undergo the familiar decay into two pions. Some experimental consequences of this picture are mentioned. I ' "T is generally accepted that the microscopic laws of-physics are invariant to the operation of charge conjugation (CC); we shall take the rigorous validity

Erratum: Tests for coherence in neutralBmeson decays [Phys. Rev. D 63, 054006 (2001)]

“…This feature, first demonstrated for neutral kaons nearly half a century ago [1], has been crucial in extracting fundamental information on the mechanism of CP violation from the decays of neutral B's. Moreover, the oscillations themselves have provided crucial information on the magnitude of electroweak couplings, and were one of the first pieces of evidence for a very heavy top quark [2].…”

“…For the B s =bs, only a lower limit [3,4] ∆m s > 15 ps −1 exists at present. 1 To be submitted to Phys. Rev.…”

The selection rule

“…The ∆I = 1/2 selection rule [1] states that, in the weak non-leptonic decays of kaons (as well as of hyperons) the amplitude in which the change in isospin is 3/2 is very suppressed with respect to that in which the change is 1/2.…”

Neutral kaon correlations in <FONT FACE=Symbol>Ö</FONT>S NN = 200 GeV Au+Au collisions at RHIC

“…An interesting property of neutral kaons is that the K 0 can change into aK 0 through a second order weak interaction. However, the particles that we normally observe through weak decay channels in the laboratory are not K 0 andK 0 [23]. Neglecting the effects of CP violation, the observed weak interaction eigenstates are given by…”