Talk:CPT symmetry

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Help with this template Comments: edit – history – watch – refresh Please add useful comments here--Cronholm144 10:20, 23 May 2007 (UTC)

[edit] Antimatter

The following statement is not quite correct:

with all of matter replaced by anti-matter (corresponding to a charge inversion),

Antimatter requires a parity inversion as well, due to the handedness of neutrinos and antineutrinos. --Christopher Thomas 20:56, 9 Jun 2005 (UTC)

This isn't really true; the operation of charge conjugation is simply as stated in the article. Charge conjugation is not a symmetry of the universe exactly because neutrinos and antineutrinos are only observed with one handedness and not the other, but this does not prevent a formal use of a charge-conjugation operation. Yggdrasil 07:30, 26 February 2006 (UTC)

My point is that replacing all matter with antimatter does not perform a C transform, as stated in the article, as it would require changing the spin of converted neutrinos, among other things. The symmetry being discussed is charge inversion; just leave it as stating charge inversion, without the misleading example.--Christopher Thomas 08:23, 26 February 2006 (UTC)

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