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

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-sta...

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Detalles Bibliográficos
Autores principales: Bewick, Gavin, Ferrario Ravasio, Silvia , Richardson, Peter, Seymour, Michael H.
Lenguaje:eng
Publicado: 2021
Materias:
Acceso en línea:https://dx.doi.org/10.1007/JHEP01(2022)026
http://cds.cern.ch/record/2775897
Descripción
Sumario: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.