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T: Fachverband Teilchenphysik
T 2: QCD (Theorie) 1
T 2.2: Talk
Monday, March 21, 2022, 16:30–16:45, T-H15
Leading-Color Two-Loop Amplitudes for Four Partons and a W-Boson in QCD — Samuel Abreu1,2,3, Fernando Febres Cordero4, Harald Ita5, •Maximilian Klinkert5, Benjamin Page1, and Vasily Sotnikov6 — 1Theoretical Physics Department, CERN, Geneva — 2Higgs Centre for Theoretical Physics, School of Physics and Astronomy,The University of Edinburgh — 3Mani L. Bhaumik Institute for Theoretical Physics, Department of Physics and Astronomy, UCLA, Los Angeles — 4Physics Department, Florida State University, Tallahassee — 5Physikalisches Institut, Albert-Ludwigs-Universität Freiburg — 6Max Planck Institute for Physics (Werner Heisenberg Institute), München
Leading-Color Two-Loop Amplitudes for Four Partons and a W-Boson in QCD
I will present the leading-color two-loop QCD corrections for the scattering of four partons and a W boson, including its leptonic decay. The amplitudes are assembled from the planar two-loop helicity amplitudes for four partons and a vector boson decaying to a lepton pair. The analytic expressions are obtained by setting up a dedicated Ansatz and constraining the free parameters from numerical samples obtained within the framework of numerical unitarity. Our results are expressed in a basis of one-mass pentagon functions, which opens the possibility of their efficient numerical evaluation.