Multiverse No More, a New Theory of Scale
August 25, 2014 11:39 AM Subscribe
Perhaps the fundamental description of the universe does not include the concepts of “mass” and “length,” implying that at its core, nature lacks a sense of scale.
posted by VikingSword (25 comments total)
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'Supersymmetry posits the existence of a missing twin particle for every particle found in nature.' But there's 'one big problem with supersymmetry:
in the particle physics that is observed in today's accelerators, every boson most definitely does NOT have a matching fermion with the same mass and charge. So if supersymmetry is a symmetry of Nature, it must somehow be broken.' 'Scale symmetry[warning: slow-loading pdf]
, constitutes a radical departure from long-standing assumptions about how elementary particles acquire their properties. 'With their field stuck at a nasty impasse,' 'researchers have returned to the master equations that describe the known particles and their interactions, and are asking: What happens when you erase the terms in the equations having to do with mass and length?'
'A theory called “agravity” (for “adimensional gravity”) developed by Salvio and Strumia
may be the most concrete realization of the scale symmetry idea thus far. Agravity weaves the laws of physics at all scales into a single, cohesive picture in which the Higgs mass and the Planck mass both arise through separate dynamical effects. As detailed in June in the Journal of High-Energy Physics, agravity also offers an explanation for why the universe inflated into existence in the first place. According to the theory, scale-symmetry breaking would have caused an exponential expansion in the size of space-time during the Big Bang.'