The Coleman-Mandula Theorem [The Physics Travel Guide]

--- theorems:coleman_mandula [2018/10/11 13:47]
jakobadmin created
+++ theorems:coleman_mandula [2018/10/11 13:55]
jakobadmin [Abstract]
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 <tabbox Abstract>
-<note tip>
+**Loopholes**
-The motto in this section is: //the higher the level of abstraction, the better//.
-</note>
+  * For a nice discussion, see Section 5.2 "Living without Supersymmetry" in [[http://archiv.ub.uni-heidelberg.de/volltextserver/23860/1/New%20Symmetry%20Concepts%20for%20Spacetime%20and%20Unification.pdf|New Symmetry Concepts for Spacetime and Unification]] by Sebastian Ohmer.
+<blockquote>There are also symmetries that are not captured by the theorem at all. These symmetries
+are for example discrete symmetries and spontaneously broken symmetries. The latter being
+symmetries that do not act on the S-matrix level and therefore evading the requirement to
+commute with S. Rather, these symmetries are symmetries of the action of the theory and are
+spontaneously broken before any calculation.<cite>{{ :theorems:colemanmandula.pdf |The Coleman-Mandula Theorem}} by Sascha Leonhardt</cite></blockquote>
 <tabbox Why is it interesting?>