We present a NNLO QCD accurate event generator for direct photon pair production at hadron colliders, based on the MiNNLOPS formalism, within the Powheg Box Res framework. Despite the presence of the photons requires the use of isolation criteria, our generator is built such that no technical cuts are needed at any stage of the event generation. Therefore, our predictions can be used to simulate kinematic distributions with arbitrary fiducial cuts. Furthermore, we describe a few modifications of the MiNNLOPS formalism in order to allow for a setting of the renormalization and factorization scales more similar to that of a fixed-order computation, thus reducing the numerical impact of higher-order terms beyond the nominal accuracy. Finally, we show several phenomenological distributions of physical interest obtained by showering the generated events with Pythia8, and we compare them with the 13 TeV data from the ATLAS Collaboration.

Gavardi, A., Oleari, C., Re, E. (2022). NNLO+PS Monte Carlo simulation of photon pair production with MiNNLO PS. JOURNAL OF HIGH ENERGY PHYSICS, 2022(9) [10.1007/JHEP09(2022)061].

NNLO+PS Monte Carlo simulation of photon pair production with MiNNLO PS

Alessandro Gavardi;Carlo Oleari
;
Emanuele Re
2022

Abstract

We present a NNLO QCD accurate event generator for direct photon pair production at hadron colliders, based on the MiNNLOPS formalism, within the Powheg Box Res framework. Despite the presence of the photons requires the use of isolation criteria, our generator is built such that no technical cuts are needed at any stage of the event generation. Therefore, our predictions can be used to simulate kinematic distributions with arbitrary fiducial cuts. Furthermore, we describe a few modifications of the MiNNLOPS formalism in order to allow for a setting of the renormalization and factorization scales more similar to that of a fixed-order computation, thus reducing the numerical impact of higher-order terms beyond the nominal accuracy. Finally, we show several phenomenological distributions of physical interest obtained by showering the generated events with Pythia8, and we compare them with the 13 TeV data from the ATLAS Collaboration.
Articolo in rivista - Articolo scientifico
Higher-Order Perturbative Calculations; Parton Shower; Resummation;
English
7-set-2022
2022
2022
9
61
open
Gavardi, A., Oleari, C., Re, E. (2022). NNLO+PS Monte Carlo simulation of photon pair production with MiNNLO PS. JOURNAL OF HIGH ENERGY PHYSICS, 2022(9) [10.1007/JHEP09(2022)061].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/394907
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