Swampland conjectures and infinite flop chains
PHYSICAL REVIEW D 104:4 (2021) ARTN 046008
Spin correlations in final-state parton showers and jet observables
European Physical Journal C Springer 81:8 (2021) 681
Abstract:As part of a programme to develop parton showers with controlled logarithmic accuracy, we consider the question of collinear spin correlations within the PanScales family of parton showers. We adapt the well-known Collins–Knowles spin-correlation algorithm to PanScales antenna and dipole showers, using an approach with similarities to that taken by Richardson and Webster. To study the impact of spin correlations, we develop Lund-declustering based observables that are sensitive to spin-correlation effects both within and between jets and extend the MicroJets collinear single-logarithmic resummation code to include spin correlations. Together with a 3-point energy correlation observable proposed recently by Chen, Moult and Zhu, this provides a powerful set of constraints for validating the logarithmic accuracy of our shower results. The new observables and their resummation further open the pathway to phenomenological studies of these important quantum mechanical effects.
Two-loop leading-colour QCD helicity amplitudes for two-photon plus jet production at the LHC
JOURNAL OF HIGH ENERGY PHYSICS (2021) ARTN 164
Topological formulae for the zeroth cohomology of line bundles on del Pezzo and Hirzebruch surfaces
Complex Manifolds De Gruyter Open 8:1 (2021) 223-229
Abstract:We show that the zeroth cohomology of effective line bundles on del Pezzo and Hirzebruch surfaces can always be computed in terms of a topological index.
Framing energetic top-quark pair production at the LHC
Journal of High Energy Physics Scuola Internazionale Superiore di Studi Avanzati 2021:7 (2021) 40