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Physics
Beyond the Standard Models
The wrong turn of string theory: our world is SUSY at low energies
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[QUOTE="mitchell porter, post: 6419061, member: 103130"] Well, the idea of the sBootstrap in its essence (please correct me if I misrepresent it:smile:) is that by considering superpartners of diquarks and mesons formed from the five light quarks [I]udscb[/I], you get all the fundamental fermions of the standard model. So first you have to add supersymmetry to Hill's scenario. But okay, maybe we can do that. More vexing is the circularity of the sBootstrap with respect to the light quarks themselves. One way around this is to think in terms of UV and IR. The "fundamental" [I]udscb[/I] can be UV degrees of freedom, and the "phenomenological" [I]udscb[/I] can be IR degrees of freedom. To me this suggests Seiberg duality, and Strassler's 1995 paper in which he describes deforming N=2 Nc=3 Nf=6 super-Yang-Mills, to get an N=1 theory in the IR which has emergent meson superfields. It's as if we want a version where one of the six flavors has a mass even in the far UV, while the others remain massless, but in the IR we still get back six quark flavors as well as emergent leptons. If we follow this logic, it means out of Hill's "spectrum of composite states", we only have those formed from quark fields, since in the UV where the binding occurs, only quark fields exist. The leptons will emerge in the IR, as superpartners of Hill's (1,2,1/2) states. [/QUOTE]
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Physics
Beyond the Standard Models
The wrong turn of string theory: our world is SUSY at low energies
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