Talk:Precision tests of QED

Under construction!
I'll be adding more to this article in the next few days. Help is always welcomed! HEL 14:46, 2 February 2007 (UTC)

The following subsections need to be expanded: I'll be trying to put in some work on these in the next few days. HEL 02:37, 3 February 2007 (UTC)
 * Anomalous magnetic dipole moments - there's an update in a 2006 New Scientist article. --> left my notes on campus by mistake; will try to expand this later.
 * Positronium - explain. --> done.
 * Condensed matter. --> expanded a bit; condensed-matter expert needed.
 * I'm more or less done for now. HEL 00:07, 12 February 2007 (UTC)

Note: Data for value for Alpha was based on bad data in Feb 07 [Gabrielse et al] Old 1/Alpha: 137.035999710 (+/-96) New (erratum June 2007): 1/Alpha: 137.035999068 (+/-96) The main article has not been updated —Preceding unsigned comment added by 212.183.136.193 (talk) 13:29, 9 November 2007 (UTC)

units
In the lead we have
 * after special relativity which currently is tested [1] to 10-21 etc.

10-21 what? Do these quantaties have units, are they ratios. Without units the first line is meaningless. --Salix alba (talk) 00:51, 26 January 2008 (UTC)

NIST Experiments Challenge Fundamental Understanding of Electromagnetism
NIST Experiments Challenge Fundamental Understanding of Electromagnetism (27 Nov 2012). Briefly, the last electron in an otherwise-completely ionized atom of titanium or iron, emits a photon of the wrong energy when falling back to the lowest orbital after excitement. --96.233.96.211 (talk) 00:29, 4 December 2012 (UTC)

1σ
“[…]the value of α obtained here is within one standard deviation of that found from the electron's anomalous magnetic dipole moment, an agreement to within ten parts in a billion.”

Huh? 137.035 999 070 (98) vs. 137.035 998 78 (91)—that does not look like 1σ, but like a highly significant difference? --Chricho ∀ (talk) 15:29, 13 December 2012 (UTC)


 * Oops, misread it, of course that is 1σ. --Chricho ∀ (talk) 18:34, 9 July 2013 (UTC)