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129 papers · 1 filter
Two-time physics, Carroll symmetry and Jordan algebras
Alexander Kamenshchik, Alessio Marrani, Federica Muscolino
We describe Carroll particles with nonzero energy (i.e., particles that remain at rest) within the framework of two-time (2T) physics developed by Bars and collaborators. In a spac…
From the Fokker-Planck equation to perturbative QFT's results in de Sitter space
Alexander Kamenshchik, Polina Petriakova
A technique to build perturbative series for the spectator field's correlation functions in de Sitter space through the Fokker-Planck equation is proposed. We derive from the first…
Canonical differential equations for the elliptic two-loop five-point integral family relevant to jet production at leading colour
Matteo Becchetti, Christoph Dlapa, Simone Zoia
We present differential equations (DEs) in canonical form for a family of two-loop five-point Feynman integrals containing elliptic functions and nested square roots. This is the o…
Chiral global embedding of Fibre Inflation with uplift
Michele Cicoli, Antonella Grassi, Osmin Lacombe +1
We carefully analyse the challenges posed by the construction of type IIB chiral global embeddings of Fibre Inflation with uplift to a de Sitter vacuum. We pre…
IR finite correlation functions in de Sitter space, a smooth massless limit, and an autonomous equation
Alexander Kamenshchik, Polina Petriakova
We explore two-point and four-point correlation functions of a massive scalar field on the flat de Sitter background in the long-wavelength approximation. By employing the Yang-Fel…
Back to the origins of brane-antibrane inflation
Michele Cicoli, Christopher Hughes, Ahmed Rakin Kamal +4
We study a new framework for brane-antibrane inflation where moduli stabilisation relies purely on perturbative corrections to the effective action. This guarantees that the model…