Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Peraro, Tiziano"'
The reduction of Feynman integrals to a basis of linearly independent master integrals is a pivotal step in loop calculations, but also one of the main bottlenecks. In this paper, we assess the impact of using transverse integration identities for th
Externí odkaz:
http://arxiv.org/abs/2409.04783
Autor:
Henn, Johannes M., Matijašić, Antonela, Miczajka, Julian, Peraro, Tiziano, Xu, Yingxuan, Zhang, Yang
We compute three families of two-loop six-point massless Feynman integrals in dimensional regularization, namely the double-box, the pentagon-triangle, and the hegaxon-bubble family. This constitutes the first analytic computation of two-loop master
Externí odkaz:
http://arxiv.org/abs/2403.19742
Autor:
Fontana, Gaia, Peraro, Tiziano
Publikováno v:
JHEP 08 (2023) 175
Intersection numbers are rational scalar products among functions that admit suitable integral representations, such as Feynman integrals. Using these scalar products, the decomposition of Feynman integrals into a basis of linearly independent master
Externí odkaz:
http://arxiv.org/abs/2304.14336
Autor:
Badger, Simon, Czakon, Michal, Hartanto, Heribertus Bayu, Moodie, Ryan, Peraro, Tiziano, Poncelet, Rene, Zoia, Simone
In this work, we provide a comprehensive set of differential cross-section distributions for photon + di-jet production in proton-proton collisions with next-to-next-to-leading order precision in massless QCD. The event selection corresponds to recen
Externí odkaz:
http://arxiv.org/abs/2304.06682
We compute the two-loop corrections to the helicity amplitudes for the coupling of a massive vector boson to a massless quark-antiquark pair and a gluon, accounting for vector and axial-vector couplings of the vector boson and distinguishing isospin
Externí odkaz:
http://arxiv.org/abs/2211.13596
Two-loop corrections to scattering amplitudes are crucial theoretical input for collider physics. Recent years have seen tremendous advances in computing Feynman integrals, scattering amplitudes, and cross sections for five-particle processes. In thi
Externí odkaz:
http://arxiv.org/abs/2112.10605
Autor:
Badger, Simon, Brønnum-Hansen, Christian, Chicherin, Dmitry, Gehrmann, Thomas, Hartanto, Heribertus Bayu, Henn, Johannes, Marcoli, Matteo, Moodie, Ryan, Peraro, Tiziano, Zoia, Simone
We present an analytic computation of the gluon-initiated contribution to diphoton plus jet production at hadron colliders up to two loops in QCD. We reconstruct the analytic form of the finite remainders from numerical evaluations over finite fields
Externí odkaz:
http://arxiv.org/abs/2106.08664
Autor:
Peraro, Tiziano, Tancredi, Lorenzo
Publikováno v:
Phys. Rev. D 103, 054042 (2021)
In this paper, we elaborate on a method to decompose multiloop multileg scattering amplitudes into Lorentz-invariant form factors, which exploits the simplifications that arise from considering four-dimensional external states. We propose a simple an
Externí odkaz:
http://arxiv.org/abs/2012.00820
Autor:
Peraro, Tiziano
FiniteFlow is a public framework for defining and executing numerical algorithms over finite fields and reconstructing multivariate rational functions. The framework allows to build complex algorithms by combining basic building blocks into graphical
Externí odkaz:
http://arxiv.org/abs/1912.03142
We present the first numerical results for the two-loop helicity amplitudes for the scattering of four partons and a W-boson in QCD. We use a finite field sampling method to reduce directly from Feynman diagrams to the coefficients of a set of master
Externí odkaz:
http://arxiv.org/abs/1906.11862