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A new event generator is proposed for two processes e+e- -> nu nu-bar gamma and e+e- -> nu nu-bar gamma gamma where nu includes all the neutrino species. The exact matrix elements of single- and double-photon emission, generated by the…

High Energy Physics - Phenomenology · Physics 2009-10-31 Y. Kurihara , J. Fujimoto , T. Ishikawa , Y. Shimizu , T. Munehisa

In this letter we estimate the contribution of the double diffractive processes for the diphoton production in $pp$ collisions at the Large Hadron Collider (LHC). The acceptance of the central and forward LHC detectors is taken into account…

High Energy Physics - Phenomenology · Physics 2020-10-28 V. P. Goncalves , D. E. Martins , M. S. Rangel

We present a calculation of the next-to-leading order (NLO) QCD corrections to gluon-induced electroweak gauge boson pair production, $gg \to ZZ$ and $gg \to W^+W^-$, matched to the PYTHIA8 parton shower in the POWHEG approach. The…

High Energy Physics - Phenomenology · Physics 2021-08-18 Simone Alioli , Silvia Ferrario Ravasio , Jonas M. Lindert , Raoul Röntsch

General-purpose Monte Carlo event generators have become important tools in particle physics, allowing the simulation of exclusive hadronic final states. In this article we examine the Pythia 8 generator, in particular focusing on its…

High Energy Physics - Phenomenology · Physics 2011-03-18 Richard Corke , Torbjörn Sjöstrand

In this paper the current release of the Monte Carlo event generator Sherpa, version 1.1, is presented. Sherpa is a general-purpose tool for the simulation of particle collisions at high-energy colliders. It contains a very flexible…

High Energy Physics - Phenomenology · Physics 2009-02-12 T. Gleisberg , S. Hoeche , F. Krauss , M. Schoenherr , S. Schumann , F. Siegert , J. Winter

In this publication, uncertainties in and differences between the MC@NLO and POWHEG methods for matching next-to-leading order QCD calculations with parton showers are discussed. Implementations of both algorithms within the event generator…

High Energy Physics - Phenomenology · Physics 2012-09-25 Stefan Hoeche , Frank Krauss , Marek Schonherr , Frank Siegert

We present a new method for matching the two twin-processes gb->H+/-t and gg->H+/-tb in Monte Carlo event generators. The matching is done by defining a double-counting term, which is used to generate events that are subtracted from the sum…

High Energy Physics - Phenomenology · Physics 2011-01-27 J. Alwall , J. Rathsman

We consider higher-order QCD corrections to the production of colourless high-mass systems (lepton pairs, vector bosons, Higgs bosons,...) in hadron collisions. We propose a new formulation of the subtraction method to numerically compute…

High Energy Physics - Phenomenology · Physics 2008-11-26 S. Catani , M. Grazzini

We present the Monte Carlo event generator WINHAC for the charged-current Drell-Yan process, i.e. single W-boson production with leptonic decays in hadronic collisions. It features multiphoton radiationwithin the Yennie-Frautschi-Suura…

High Energy Physics - Phenomenology · Physics 2014-11-20 Wieslaw Placzek

The study of dileptons in high-energy heavy-ion collisions provides critical insights into the properties of the quark-gluon plasma and the thermal radiation emitted throughout its evolution. In the low-mass region, dileptons originate from…

High Energy Physics - Phenomenology · Physics 2026-03-13 Tomáš Ježo , Michael Klasen , Alexander Puck Neuwirth

The subtraction method for the matching between the matrix element (ME) and parton shower (PS), that has been developed for combining 0-jet and 1-jet production processes in association with electroweak-boson production in hadron…

High Energy Physics - Phenomenology · Physics 2016-06-21 Shigeru Odaka , Norihisa Watanabe , Yoshimasa Kurihara

In the case of the gluon-fusion process in deep-inelastic leptoproduction, I explicitly show how to incorporate NLO corrections in a Monte-Carlo event generator by a subtraction method. I calculate the parton densities to be used by the…

High Energy Physics - Phenomenology · Physics 2009-10-31 John Collins

GRAPE-Dilepton is a Monte Carlo event generator for dilepton production in ep collisions. The cross-section calculation is based on the exact matrix elements in the electroweak theory at tree level. The dilepton productions via $\gamma…

High Energy Physics - Phenomenology · Physics 2014-11-17 Tetsuo Abe

GR@PPA 2.8 is a program package including event generators for single and double weak-boson production processes at hadron collisions, in which a jet matching method is implemented for simulating the weak-boson kinematics in the entire…

High Energy Physics - Phenomenology · Physics 2012-02-20 Shigeru Odaka

Physics and programming aspects are discussed for a Fortran 77 Monte Carlo program to simulate complete events in deep inelastic lepton-nucleon scattering. The parton level interaction is based on the standard model electroweak cross…

High Energy Physics - Phenomenology · Physics 2009-10-28 G. Ingelman , A. Edin , J. Rathsman

We consider $Z \gamma$ production in hadronic collisions and present the first computation of next-to-next-to-leading order accurate predictions consistently matched to parton showers (NNLO+PS). Spin correlations, interferences and…

High Energy Physics - Phenomenology · Physics 2021-07-07 Daniele Lombardi , Marius Wiesemann , Giulia Zanderighi

In this paper we present a comparative study between PYTHIA, EPOS, QGSJET, and SIBYLL generators. The global event observables considered are the charged energy flow, charged-particle distributions, charged-hadron production ratios and…

High Energy Physics - Phenomenology · Physics 2019-09-04 Alexandru Catalin Ene , Alexandru Jipa , Lavinia-Elena Giubega

We develop a Monte-Carlo event generator based on combination of a parton production formula including the effects of parton saturation (called the DHJ formula) and hadronization process due to the Lund string fragmentation model. This…

High Energy Physics - Phenomenology · Physics 2015-06-23 Wei-Tian Deng , Hirotsugu Fujii , Kazunori Itakura , Yasushi Nara

We compare theoretical results for jet and prompt photon production in polarized pp-collisions at RHIC obained with three different methods: a) the unpolarized event generator PYTHIA combined with hadronic asymmetry weights calculated from…

High Energy Physics - Phenomenology · Physics 2007-05-23 O. Martin , A. Schafer

This paper presents an overview of Monte Carlo(MC) event generators for simulation of proton-proton collisions along with the results on hadron production at Nuclotron-based Ion Collider fAcility (NICA) energies. Namely, mean…

High Energy Physics - Phenomenology · Physics 2023-10-31 Maxim Azarkin , Martin Kirakosyan