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arXiv · 2107.04051

Initial State Radiation in the Herwig 7 Angular-Ordered Parton Shower

Gavin Bewick·Silvia Ferrario Ravasio·Peter Richardson·Michael H. Seymour
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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 $Z^0$-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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Gavin Bewick, Silvia Ferrario Ravasio, Peter Richardson, Michael H. Seymour. 2021-07-08. Initial State Radiation in the Herwig 7 Angular-Ordered Parton Shower. https://doi.org/10.1007/jhep01(2022)026

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