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one distinguishes bottom-up model building … from bottom-up model building
The former should be ’top-down’?
David, thanks for fixing, I see this only now.
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The extreme form of bottom-up holographic model building is explored in
where an appropriate bulk geometry is computer-generated from specified boundary behaviour.
started a further subsection on Type0/YM correspondence:
Instead of starting with M5-branes in locally supersymmetric M-theory and then spontaneously breaking all supersymmetry by suitable KK-compactification as in the Witten-Sakai-Sugimoto model, one may start with a non-supersymmetric bulk string theory in the first place.
In this vein, it has been argued in GLMR 00 that there is holographic duality between type 0 string theory and non-supersymmetric 4d Yang-Mills theory (hence potentially something close to QCD).
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Added pointer to more of the original references on modelling baryons by wrapped branes:
{#BISY98} A. Brandhuber, N. Itzhaki, J. Sonnenschein, S. Yankielowicz Baryons from Supergravity, JHEP 9807:020,1998 (arxiv:hep-th/9806158)
Yosuke Imamura, Baryon Mass and Phase Transitions in Large N Gauge Theory, Prog. Theor. Phys. 100 (1998) 1263-1272 (arxiv:hep-th/9806162)
Yosuke Imamura, Supersymmetries and BPS Configurations on Anti-de Sitter Space, Nucl. Phys. B537:184-202,1999 (arxiv:hep-th/9807179)
{#CGS98} Curtis G. Callan, Alberto Guijosa, Konstantin G. Savvidy, Baryons and String Creation from the Fivebrane Worldvolume Action (arxiv:hep-th/9810092)
Curtis G. Callan, Alberto Guijosa, Konstantin G. Savvidy, Oyvind Tafjord, Baryons and Flux Tubes in Confining Gauge Theories from Brane Actions, Nucl. Phys. B555 (1999) 183-200 (arxiv:hep-th/9902197)
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Understanding the nucleon structure is one of the most important research topics in fundamental science, and tremendous efforts have been done to deepen our knowledge over several decades. $[...]$ Since $[these]$ are highly nonperturbative physical quantities, in principle they are not calculable by the direct use of QCD. Furthermore, although there is available data, this has large errors. These facts cause the huge uncertainties which can be seen in the preceding studies based on the global QCD analysis.
In this work, we investigate the gluon distribution at small x by calculating the DIS structure functions in the framework of holographic QCD, which is constructed based on the AdS/CFT correspondence.
I have added a slightly improved diagram of the brane configurations (here), now also including the “monopole D6-branes”, and including a second diagram that shows them from another point of view.
Will be using this now to add some content at D6-D8 brane intersection
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