Talk:Hierarchy problem

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The diagrams in the figures are incorrect and should be removed because the second diagram does not exist (count the number of doublets at each vertex)! The correct set of diagrams for the cancellation of the quadratic divergence from the Higgs quartic coupling involvings the gauginos and gauge bosons (as the quartic coupling arises from the D-terms). The diagram could in principle be related to the top quark quadratic divegence, but would require relabelling (and then technically it would require both the left handed and right handed top squarks in seperate diagrams, but that is splitting hairs). -- jay 00:48, 1 February 2006 (UTC)

I think you're right. How about this as a replacement?

Cancellation of the Higgs boson quadratic mass renormalization between fermionic top quark loop and scalar stop squark tadpole Feynman diagrams in a supersymmetric extension of the Standard Model

-- Xerxes 18:08, 1 February 2006 (UTC)

I think that the first diagram should be tops (rather than stops). The original figure is used in several different places, so it would be great if it could be updated globally.

I mean to indicate that these are the diagrams that cancel the equivalent top diagrams. -- Xerxes 21:22, 1 February 2006 (UTC)

I don't believe that the first diagram cancels any diagram in the fermionic sector. It arises from a trilinear scalar coupling (ie a dimensionful coupling) that only gives rise to a log divergence and contributes to the top yukawa's renormalisation of the mu term (this diagram in the susy limit arises from the cross term in the Higgs' F-term potential). Although I could be being myopic... -- jay 02:56, 2 February 2006 (UTC)

I don't really know that much about this subject. I just tried to pick up enough from some papers to put together a better diagram. How's this one? -- Xerxes 17:48, 2 February 2006 (UTC)

Perfect! -- jay 21:04, 2 February 2006 (UTC)