Personal academic portfolio and blog of Sérgio Carrôlo.https://scarrolo.github.io/https://scarrolo.github.io/publications/qcd-scattering-amplitudes-prescriptive-unitarity/https://scarrolo.github.io/publications/qcd-scattering-amplitudes-prescriptive-unitarity/Usually bootstrap approaches start with a naive ansatz: match all possible functions with all possible pre-factors. [Prescriptive unitarity](https://arxiv.org/pdf/1704.05460) gives us a guiding principle in which all the finite IR parts are completely fixed. We bootstrap the remaining free coefficients by imposing consistency with physical limits.Mon, 02 Feb 2026 00:00:00 GMThttps://scarrolo.github.io/publications/gluon-leading-singularities-surfaces/https://scarrolo.github.io/publications/gluon-leading-singularities-surfaces/We show that by gluing three-gluon amplitudes in QFT, we rediscover the combinatorial structure of curves on surfaces provided by surfaceology. Using some nice graphical arguments we can fix the expression for the exponents of closed curves.Thu, 18 Dec 2025 00:00:00 GMThttps://scarrolo.github.io/publications/bootstrapping-six-gluon-qcd-amplitudes/https://scarrolo.github.io/publications/bootstrapping-six-gluon-qcd-amplitudes/A symbol-level bootstrap construction of planar two-loop six-gluon scattering amplitudes in QCD for the --++++ helicity configuration.Thu, 23 Oct 2025 00:00:00 GMThttps://scarrolo.github.io/publications/hexagonal-wilson-loop-lagrangian-insertion/https://scarrolo.github.io/publications/hexagonal-wilson-loop-lagrangian-insertion/A two-loop bootstrap computation of the null hexagonal Wilson loop with a Lagrangian insertion in planar maximally supersymmetric Yang-Mills theory.Fri, 02 May 2025 00:00:00 GMThttps://scarrolo.github.io/publications/cp-symmetric-2hdm-yukawa-sector/https://scarrolo.github.io/publications/cp-symmetric-2hdm-yukawa-sector/Published in Phys. Rev. D 112, 035024 (2025)Thu, 27 Mar 2025 00:00:00 GMThttps://scarrolo.github.io/publications/symmetry-decoupling-multi-higgs/https://scarrolo.github.io/publications/symmetry-decoupling-multi-higgs/We show that there is a decoupling limit in N-Higgs-doublet-models iff the vacuum preserves the family symmetry of the lagrangian.Mon, 22 Feb 2021 00:00:00 GMT