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DTSTAMP:20260919T231310Z
LAST-MODIFIED:20161128T184352Z
DTSTART:20161207T203000Z
DTEND:20161207T213000Z
UID:event1661@bu.edu
URL:http://physics.bu.edu/internal/events/show/1661
SUMMARY:Soft-Collinear Supersymmetry
DESCRIPTION:Featuring Tim Cohen\, Oregon\n\nPart of the HET Seminar Series.
	\n\nSoft-Collinear Effective Theory (SCET) is a framework for modeling the 
	infrared structure of theories whose long distance behavior is dominated by
	 soft and collinear divergences. This paper demonstrates that SCET can be m
	ade compatible with supersymmetry (SUSY). Explicitly\, the effective theory
	 for N=1 SUSY Yang-Mills is constructed and shown to be consistent. For con
	trast\, arguments are given that chiral SUSY theories with Yukawa couplings
	\, specifically the single flavor Wess-Zumino model\, are incompatible with
	 the collinear expansion. SCET is formulated by expanding fields along a li
	ght-like direction and then subsequently integrating out degrees-of-freedom
	 that are away from the light-cone. Defining the theory with respect to a s
	pecific frame obfuscates Lorentz invariance -- given that SUSY is a space-t
	ime symmetry\, this presents a possible obstruction. The cleanest language 
	with which to expose the congruence between SUSY and SCET requires explorin
	g two novel formalisms: collinear fermions as two-component Weyl spinors\, 
	and SCET in light-cone gauge. By expressing SUSY Yang-Mills in "collinear s
	uperspace"\, a slice of superspace derived by integrating out half the ferm
	ionic coordinates\, the light-cone gauge SUSY SCET theory can be written in
	 terms of superfields. As a byproduct\, bootstrapping up to the full theory
	 yields the first algorithmic approach for determining the SUSY Yang-Mills 
	on-shell superspace action. This work paves the way toward discovering the 
	effective theory for the collinear limit of N=4 SUSY Yang-Mills.
LOCATION:PRB 565\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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