MTd2
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I guess Marcus will really enjoy this talk:
http://mitchell.physics.tamu.edu/Conference/string2010/documents/slides/Dixon.LDNeq8Strings2010.ppt
Dixon says that N=8 SUGRA in 4 dimensions might be in the swampland after all, that is, it is no kind of low energy limit of any type of compactification of any string theory. During the talk you can see that at low loops this theory coincides in many terms but at highest orders, it seems that there is a disagreement between what is obtained from string theory aproximations and direct computations using maximum cut diagrams.
Dixon talks about the possibility that the UV completion might be a punctual theory, not string theory.
http://mitchell.physics.tamu.edu/Conference/string2010/documents/slides/Dixon.LDNeq8Strings2010.ppt
Dixon says that N=8 SUGRA in 4 dimensions might be in the swampland after all, that is, it is no kind of low energy limit of any type of compactification of any string theory. During the talk you can see that at low loops this theory coincides in many terms but at highest orders, it seems that there is a disagreement between what is obtained from string theory aproximations and direct computations using maximum cut diagrams.
Dixon talks about the possibility that the UV completion might be a punctual theory, not string theory.
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