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hep-th2017
An Introduction to Pure Spinor Superstring Theory
Nathan Berkovits, Humberto Gomez
In these lecture notes presented at the 2015 Villa de Leyva Summer School, we give an introduction to superstring theory. We begin by studying the particle and superparticle in ord…
hep-th2017★ 24 cited
One-loop Parke-Taylor factors for quadratic propagators from massless scattering equations
Humberto Gomez, Cristhiam Lopez-Arcos, Pedro Talavera
In this paper we reconsider the Cachazo-He-Yuan construction (CHY) of the so called scattering amplitudes at one-loop, in order to obtain quadratic propagators. In theories with co…
hep-th2017★ 27 cited
Quadratic Feynman Loop Integrands From Massless Scattering Equations
Humberto Gomez
Recently the Cachazo-He-Yuan (CHY) approach has been extended to loop level, but the resulting loop integrand has propagators that are linear in the loop momentum unlike Feynman's.…