136 research outputs found
On super form factors of half-BPS operators in N=4 super Yang-Mills
Open Access, (c) The Authors. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited
Form factors of chiral primary operators at two loops in ABJ(M)
archiveprefix: arXiv primaryclass: hep-th reportnumber: NORDITA-2013-34 slaccitation: %%CITATION = ARXIV:1305.2422;%%archiveprefix: arXiv primaryclass: hep-th reportnumber: NORDITA-2013-34 slaccitation: %%CITATION = ARXIV:1305.2422;%%archiveprefix: arXiv primaryclass: hep-th reportnumber: NORDITA-2013-34 slaccitation: %%CITATION = ARXIV:1305.2422;%
The last of the simple remainders
This article is distributed under the terms of the Creative Commons
Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited
Two-loop Sudakov form factor in ABJM
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited
A Comparison of the Wholesale Model and the Agency Model in Differentiated Markets
We compare the wholesale model and the agency model that characterise a vertical relation in a bilateral duopoly framework. Results suggest that the agency model may be regarded as an example of retailer power resale price maintenance and provide an economic view of why restraints of this kind should be evaluated under the rule of reason. While competition is more likely to be undercut under the agency model, relative to the wholesale model, the agency model benefits consumers by offering relatively lower retail prices and greater demand
Yang-Mills amplitude relations at loop level from non-adjacent BCFW shifts
This article studies methods to obtain relations for scattering amplitudes at
the loop level, with concrete examples at one loop. These methods originate in
the analysis of large so-called Britto-Cachazo-Feng-Witten shifts of tree level
amplitudes and loop level integrands. In particular BCFW shifts for particles
which are not color adjacent and some particular generalizations of this
situation are analyzed in some detail in four and higher dimensions. For
generic non-adjacent shifts our results are independent of loop order for
integrands and hold for generic minimally coupled gauge theories with possible
scalar potential and Yukawa terms. By a standard argument this result indicates
a generalization of the Bern-Carrasco-Johansson relations for tree level
amplitudes exists to the integrand at all loop levels. A concrete relation is
presented at one loop. Furthermore, inspired by results in QED it is shown that
the results on generalized BCFW shifts of tree level amplitudes imply relations
for the so-called rational, bubble and triangle terms of one loop amplitudes in
pure Yang-Mills theory. Bubble and triangle terms for instance are shown to
obey a five photon decoupling identity, while a three photon decoupling
identity is demonstrated for the rational terms. Along the same lines recently
conjectured relations for helicity equal amplitudes at one loop are shown to
generalize to helicity independent relations for the massive box coefficient of
the rational terms.Comment: 69 pages, 27 figure
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