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Sep 27 – 30, 2016
DESY Hamburg
Europe/Berlin timezone

Z-theory — non-linear sigma model amplitudes and more from open strings

Sep 29, 2016, 2:30 PM
20m
Seminar room 1 (DESY Hamburg)

Seminar room 1

DESY Hamburg

Notkestrasse 85, 22607 Hamburg
String & Mathematical Physics Parallel Session: Strings & Mathematical Physics

Speaker

Dr Oliver Schlotterer (AEI Potsdam)

Description

In this talk we derive the tree-level S-matrix of the effective theory of Goldstone bosons known as the non-linear sigma model (NLSM) from string theory. This novel connection relies on a recent realization of tree-level open-superstring S-matrix predictions as a double copy of super-Yang--Mills theory with Z-theory --- the collection of putative scalar effective field theories encoding all the alpha'-dependence of the open superstring. Here we identify the color-ordered amplitudes of the NLSM as the low-energy limit of abelian Z-theory. This realization also provides natural higher-derivative corrections to the NLSM amplitudes arising from higher powers of alpha' in the abelian Z-theory amplitudes, and through double copy also to Born--Infeld and Volkov--Akulov theories. The Kleiss--Kuijf and Bern--Carrasco--Johansson relations obeyed by Z-theory amplitudes thereby apply to all alpha'-corrections of the NLSM. As such we naturally obtain a cubic-graph parameterization for the abelian Z-theory predictions whose kinematic numerators obey the duality between color and kinematics to all orders in alpha'.

Primary author

Dr Oliver Schlotterer (AEI Potsdam)

Co-authors

Dr Carlos Mafra (University of Southampton) Dr John-Joseph Carrasco (CEA Saclay)

Presentation materials