[TORCHES] Third-Order Radiative Corrections to Hadronic Event Shapes
Ente: EC
Scadenza: 2029-08-31
Importo max: 292.119 EUR
Paese: EU
Descrizione
As experimental measurements at particle colliders become increasingly more accurate, ever more precise theoretical predictions must be derived from the Standard Model to further probe the fundamental constituents of nature and search for new phenomena. In high-energy collisions, Quantum Chromodynamics (QCD) effects dominate and must be quantified as accurately as possible. This is achieved with a perturbative approach by progressively computing higher-order QCD radiative corrections to scattering processes. Electron-positron colliders provide an ideal environment for QCD studies due to the well-controlled leptonic initial state, which allows for extremely precise measurements and calculations. Hadronic event shapes in electron-positron annihilation are classic observables relevant for a wide range of phenomenological applications, including the determination of the strong coupling constant.
The TORCHES project advances the frontiers of theoretical calculations in QCD by computing the unknown third-order perturbative correction to hadronic event shapes in electron-positron annihilation. A dedicated infrared subtraction scheme will be designed to deal with the emergence of infrared singularities up to third-order in perturbation theory. Furthermore, techniques to ensure the numerical stability of multi-loop matrix elements will be employed to achieve an efficient and reliable implementation.
The obtained results will enable more accurate comparisons with existent data from the Large Electron-Positron collider and demonstrate the feasibility of theoretical calculations certainly required to match the physics goals of the next generation of electron-positron machines, such as the Future Circular Collider, where experimental precision will reach unprecedented levels. The developed computational framework will constitute the backbone for future extensions to other observables and processes, including hadron-collider ones, paving the way to third-order QCD phenomenology.
Settori: Horizon Europe Topics
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