Talk:CPT symmetry

From Wikipedia, the free encyclopedia

	Physics Portal This article is within the scope of WikiProject Physics, which collaborates on articles related to physics.
???	This article has not yet received a rating on the assessment scale. [FAQ]
???	This article has not yet received an importance rating within physics.
Help with this template Please rate this article, and then leave comments here to explain the ratings and/or to identify the strengths and weaknesses of the article.

[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)