Showing papers by "Pierpaolo Mastrolia published in 2009"
CERN1
TL;DR: In this paper, the authors show how Stokes' theorem can be applied for computing double-cut integrals of one-loop amplitudes analytically, in the fashion of the generalized Cauchy Formula.
90 citations
Paul Scherrer Institute1, Joint Institute for Nuclear Research2, University of Pavia3, CERN4, Joseph Fourier University5, University of Southampton6, Budker Institute of Nuclear Physics7, Novosibirsk State University8, RWTH Aachen University9, University of Silesia in Katowice10, University of Mainz11, Polish Academy of Sciences12, Humboldt University of Berlin13, École Polytechnique14, Karlsruhe Institute of Technology15, Kharkov Institute of Physics and Technology16, Roma Tre University17, KEK18, University of Alberta19, Jagiellonian University20, University of Bologna21, Spanish National Research Council22, University of Paris23, University of Hawaii24, University of Liverpool25, University of Parma26, University of Freiburg27, Chinese Academy of Sciences28, Baylor University29, University of Wuppertal30
TL;DR: In this paper, the authors present the achievements of the last years of the experimental and theoretical groups working on hadronic cross section measurements at the low energy e+e- colliders in Beijing, Frascati, Ithaca, Novosibirsk, Stanford and Tsukuba and sketch the prospects in these fields for the years to come.
Abstract: We present the achievements of the last years of the experimental and theoretical groups working on hadronic cross section measurements at the low energy e+e- colliders in Beijing, Frascati, Ithaca, Novosibirsk, Stanford and Tsukuba and on tau decays. We sketch the prospects in these fields for the years to come. We emphasise the status and the precision of the Monte Carlo generators used to analyse the hadronic cross section measurements obtained as well with energy scans as with radiative return, to determine luminosities and tau decays. The radiative corrections fully or approximately implemented in the various codes and the contribution of the vacuum polarisation are discussed.
21 citations
Journal Article•
5 citations
01 Jan 2009
TL;DR: Two-particle unitarity cuts of scattering amplitudes can be efficiently computed by applying Stokes' Theorem, in the fashion of the Generalised Cauchy Theorem.
Abstract: Two-particle unitarity-cuts of scattering amplitudes can be efficiently computed by applying Stokes' Theorem, in the fashion of the Generalised Cauchy Theorem. Consequently, the Optical Theorem can be related to the Berry Phase, showing how the imaginary part of arbitrary one-loop Feynman amplitudes can be interpreted as the flux of a complex 2-form.
CERN1
TL;DR: In this paper, the authors relate the Optical Theorem to the Berry Phase, showing how the imaginary part of arbitrary one-loop Feynman amplitudes can be interpreted as the flux of a complex 2-form.
Abstract: Elaborating on the observation that two-particle unitarity-cuts of scattering amplitudes can be computed by applying Stokes' Theorem, we relate the Optical Theorem to the Berry Phase, showing how the imaginary part of arbitrary one-loop Feynman amplitudes can be interpreted as the flux of a complex 2-form.