TY - JOUR
T1 - Nonperturbative enhancement of superloop at strong coupling
AU - Belitsky, Andrei
N1 - Funding Information:
We are indebted to Hank Lamm for help with numerical calculations. We would like to thank Benjamin Basso for informing us about the ongoing analysis being done in collaboration with Amit Sever and Pedro Vieira [47] , which overlaps with the current consideration, as well as discussions at the final stage of this work completed during the visit at ENS (Paris) and IPhT (Saclay). We would like to thank Benjamin Basso and Gregory Korchemsky and for the warm hospitality at respective institutions. This research was supported by the U.S. National Science Foundation under the grants PHY-1068286 and PHY-1403891 .
Publisher Copyright:
© 2016 The Author
PY - 2016/10/1
Y1 - 2016/10/1
N2 - We address the near-collinear expansion of NMHV six-particle scattering amplitudes at strong value of the 't Hooft coupling in planar maximally supersymmetric Yang–Mills theory. We complement recent studies of this observable within the context of the Pentagon Operator Product Expansion, via the dual superWilson loop description, by studying effects of multiple scalar exchanges that accompany (or not) massive flux-tube excitations. Due to the fact that holes have a very small, nonperturbatively generated mass mh which is exponentially suppressed in the 't Hooft coupling, their exchanges must be resummed in the ultraviolet limit, τ≪1/mh. This procedure yields a contribution to the expectation value of the superloop which enters on equal footing with the classical area — a phenomenon which was earlier observed for MHV amplitudes. In all components, the near-massless scalar exchanges factorize from the ones of massive particles, at leading order in strong coupling.
AB - We address the near-collinear expansion of NMHV six-particle scattering amplitudes at strong value of the 't Hooft coupling in planar maximally supersymmetric Yang–Mills theory. We complement recent studies of this observable within the context of the Pentagon Operator Product Expansion, via the dual superWilson loop description, by studying effects of multiple scalar exchanges that accompany (or not) massive flux-tube excitations. Due to the fact that holes have a very small, nonperturbatively generated mass mh which is exponentially suppressed in the 't Hooft coupling, their exchanges must be resummed in the ultraviolet limit, τ≪1/mh. This procedure yields a contribution to the expectation value of the superloop which enters on equal footing with the classical area — a phenomenon which was earlier observed for MHV amplitudes. In all components, the near-massless scalar exchanges factorize from the ones of massive particles, at leading order in strong coupling.
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U2 - 10.1016/j.nuclphysb.2016.08.017
DO - 10.1016/j.nuclphysb.2016.08.017
M3 - Article
AN - SCOPUS:84983389135
SN - 0550-3213
VL - 911
SP - 425
EP - 446
JO - Nuclear Physics B
JF - Nuclear Physics B
ER -