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DTSTAMP:20260918T221830Z
LAST-MODIFIED:20140909T135116Z
DTSTART:20140917T193000Z
DTEND:20140917T203000Z
UID:event1311@bu.edu
URL:http://physics.bu.edu/internal/events/show/1311
SUMMARY:Natural Tuning: Towards A Proof of Concept
DESCRIPTION:Featuring Sergei Dubovsky\, NYU\n\nPart of the HET Seminar Seri
	es.\n\nAbstract:\nThe cosmological constant problem and the absence of new 
	natural physics at the electroweak scale\, if confirmed by the LHC\, may ei
	ther indicate that the nature is fine-tuned or that a refined notion of nat
	uralness is required. We construct a family of toy UV complete quantum theo
	ries providing a proof of concept for the second possibility. Low energy ph
	ysics is described by a tuned effective field theory\, which exhibits relev
	ant interactions not protected by any symmetries and separated by an arbitr
	ary large mass gap from the new "gravitational" physics\, represented by a 
	set of irrelevant operators. Nevertheless\, the only available language to 
	describe dynamics at all energy scales does not require any fine-tuning. Th
	e interesting novel feature of this construction is that UV physics is not 
	described by a fixed point\, but rather exhibits asymptotic fragility. Obse
	rvation of additional unprotected scalars at the LHC would be a smoking gun
	 for this scenario. Natural tuning also favors TeV scale unification.
LOCATION:PRB 595\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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