Abstract
We study the simulation of initial-state radiation in angular-ordered parton showers in order to investigate how different interpretations of the ordering variable affect the logarithmic accuracy of such showers. This also enables us to implement a recoil scheme which is consistent between final-state and initial-state radiation. We present optimal values of the strong coupling and intrinsic transverse momentum to be used in each version of the parton shower, tuned using Z0-boson production at the LHC at 7 TeV. With these tuned showers, we perform a phenomenological study of the Drell-Yan process at several centre-of-mass energies.
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Bewick, G., Ravasio, S.F., Richardson, P. et al. Initial state radiation in the Herwig 7 angular-ordered parton shower. J. High Energ. Phys. 2022, 26 (2022). https://doi.org/10.1007/JHEP01(2022)026
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DOI: https://doi.org/10.1007/JHEP01(2022)026