Radiative corrections and Monte Carlo tools for low-energy hadronic cross sections in $e^+ e^-$ collisions
/ Authors
Riccardo Aliberti, P. Beltrame, E. Budassi, C. C. Carloni Calame, G. Colangelo, L. Cotrozzi, A. Denig, A. Driutti, T. Engel, Lois Flower
and 25 more authors
A. Gurgone, M. Hoferichter, Fedor Ignatov, S. Kollatzsch, B. Kubis, A. Kup's'c, Fabian Lange, A. Lusiani, S. Müller, J. Paltrinieri, P. Rosàs, F. Piccinini, A. Price, L. Punzi, M. Rocco, O. Shekhovtsova, A. Si'odmok, A. Signer, G. Stagnitto, P. Stoffer, T. Teubner, W. J. Torres Bobadilla, F. Ucci, Y. Ulrich, Graziano Venanzoni
/ Abstract
We present the results of Phase I of an ongoing review of Monte Carlo tools relevant for low-energy hadronic cross sections. This includes a detailed comparison of Monte Carlo codes for electron–positron scattering into a muon pair, pion pair, and electron pair, for scan and radiative-return experiments. After discussing the various approaches that are used and effects that are included, we show differential cross sections obtained with AfkQed, BabaYaga@NLO, KKMC, MCGPJ, McMule, Phokhara, and Sherpa, for scenarios that are inspired by experiments providing input for the dispersive evaluation of the hadronic vacuum polarisation.
Journal: SciPost Physics Community Reports