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The modelling of non-perturbative effects is an important part of modern collider physics simulations. In hadron collisions there is some indication that the modelling of the interactions of the beam remnants, the underlying event, may…

High Energy Physics - Phenomenology · Physics 2015-05-13 Daniel Wicke , Peter Z. Skands

We present a new, universally applicable toy model of colour reconnections in hadronic final states. The model is based on hadronising strings and has one free parameter. We next present an implementation of this model in the Pythia event…

High Energy Physics - Phenomenology · Physics 2008-11-26 Peter Skands , Daniel Wicke

The optimisation (tuning) of the free parameters of Monte Carlo event generators by comparing their predictions with data is important since the simulations are used to calculate experimental efficiency and acceptance corrections, or…

High Energy Physics - Phenomenology · Physics 2023-11-07 Salvatore La Cagnina , Kevin Kröninger , Stefan Kluth , Andrii Verbytskyi

Production of quarks and gluons in hadron collisions tests Quantum Chromodynamics (QCD) over a wide range of energy. Models of QCD are implemented in event generators to simulate hadron collisions and evolution of quarks and gluons into…

High Energy Physics - Phenomenology · Physics 2019-12-19 S. K. Kundu , T. Sarkar , M. Maity

We perform two tunes of the SHERPA Monte Carlo generator for the generation of $e^+e^-\rightarrow\mbox{hadrons}$ using the publicly-available LEP analyses in Rivet. In each of these tunes, we generate events at $\sqrt{s}=91.25\mbox{ GeV}$…

High Energy Physics - Experiment · Physics 2018-10-29 Jennifer Kile , Julian von Wimmersperg-Toeller

Event shape and charged particle inclusive distributions determined from 750 000 hadronic Z events measured with the DELPHI detector at LEP are presented. The statistical and systematic precision of this data allows for a decisive…

High Energy Physics - Experiment · Physics 2016-08-31 K. Hamacher , M. Weierstall

In the context of design studies for future $pp$ colliders, we present a set of predictions for average soft-QCD event properties for $pp$ collisions at $E_\mathrm{CM} = 14$, $27$, and $100$ TeV. The current default Monash 2013 tune of the…

High Energy Physics - Phenomenology · Physics 2018-11-28 Helen Brooks , Peter Skands

This study presents a comprehensive analysis of particle production in proton-proton ($pp$) collisions at $\sqrt{s}$ = 7 TeV using Pythia~8 event generator. We investigate the transverse momentum $p_T$ spectra of light charged hadrons…

High Energy Physics - Phenomenology · Physics 2024-04-09 Rabia Bashir , Ramoona Shahzadi , M. U. Ashraf

Measurements at LHC show an increased production of strange hadrons with charged multiplicity in pp collisions, which is not described by the Lund String Model (with the Monash tune) implemented in PYTHIA. This work investigates string…

High Energy Physics - Phenomenology · Physics 2026-05-01 Javira Altmann , Lorenzo Bernardinis , Peter Skands , Valentina Zaccolo

The fractal and phase transitional properties of each type of pions (i.e. $\pi^{\pm,0}$) through one-dimensional $\eta-$space, at an energy of $\sqrt{s}=13~$TeV, have been studied with the help of the Scaled Factorial Moment (SFM)…

High Energy Physics - Phenomenology · Physics 2024-09-05 Tumpa Biswas , Dibakar Dhar , Azharuddin Ahmed , Prabir Kumar Haldar , Abdel Nasser Tawfik

This paper is a follow-up of Ref.~\cite{Ravasio:2018lzi}, where we studied the impact of next-to-leading order calculations merged with parton shower generators (NLO+PS) of increasing accuracy in the extraction of the top mass at hadron…

High Energy Physics - Phenomenology · Physics 2020-01-08 Silvia Ferrario Ravasio , Tomas Jezo , Paolo Nason , Carlo Oleari

We study the dynamics of identified hadrons ($\pi^\pm$, $K^\pm$ and $p(\overline{p})$) production in $O+O$ collisions at $\sqrt{s_{\mathrm{NN}}} = 7$TeV using recently updated version of EPOS4, string melting version of A Multi-Phase…

High Energy Physics - Phenomenology · Physics 2025-05-13 Rabia Bashir , Ramoona Shehzadi , M. U. Ashraf , A. M. Khan

Increasingly, with the data collected at the LHC we are confronted with the possible existence of flow in pp collisions. In this work we show that PYTHIA 8 produces flow-like effects in events with multiple hard subcollisions due to color…

High Energy Physics - Phenomenology · Physics 2013-08-08 Antonio Ortiz , Peter Christiansen , Eleazar Cuautle , Ivonne Maldonado , Guy Paic

Our hadro-charmonium and compact tetraquark model predictions, published before the BESIII and LHCb experimental data for the $Z_{\rm cs}(3985)$ and $Z_{\rm cs}(4003)$ tetraquarks were released, match surprisingly well with them. Here, we…

High Energy Physics - Phenomenology · Physics 2022-08-01 J. Ferretti , E. Santopinto

The GENIE neutrino Monte Carlo describes neutrino-induced hadronization with an effective model, known as AGKY, which is interfaced with PYTHIA at high invariant mass. Only the low-mass AGKY model parameters were extracted from hadronic…

The observation of heavy-ion-like behaviour in pp collisions at the LHC suggests that more physics mechanisms are at play than traditionally assumed. The introduction e.g. of quark-gluon plasma or colour rope formation can describe several…

High Energy Physics - Phenomenology · Physics 2017-03-08 Nadine Fischer , Torbjörn Sjöstrand

We present a study of charmed hadron transverse momentum distribution from p+p collisions at $\sqrt{s_{NN}}=200$ GeV using the PYTHIA Monte Carlo event generator. The PHENIX tuned PYTHIA parameter set based on electron measurements alone…

High Energy Physics - Phenomenology · Physics 2007-05-23 Xiaoyan Lin

A novel tune has been made for the MicroBooNE experiment. The fit uses 4 new parameters within the GENIE v3.0.6 Monte Carlo program. Charged current pionless data from the T2K experiment was used. New uncertainties were obtained. These…

High Energy Physics - Experiment · Physics 2022-05-02 The MicroBooNE Collaboration , P. Abratenko , R. An , J. Anthony , L. Arellano , J. Asaadi , A. Ashkenazi , S. Balasubramanian , B. Baller , C. Barnes , G. Barr , V. Basque , L. Bathe-Peters , O. Benevides Rodrigues , S. Berkman , A. Bhanderi , A. Bhat , M. Bishai , A. Blake , J. Y. Book , L. Camilleri , D. Caratelli , I. Caro Terrazas , F. Cavanna , G. Cerati , Y. Chen , D. Cianci , J. M. Conrad , M. Convery , L. Cooper-Troendle , J. I. Crespo-Anadon , M. Del Tutto , S. R. Dennis , P. Detje , A. Devitt , R. Diurba , R. Dorrill , K. Duffy , S. Dytman , B. Eberly , A. Ereditato , J. J. Evans , R. Fine , G. A. Fiorentini Aguirre , R. S. Fitzpatrick , B. T. Fleming , N. Foppiani , D. Franco , A. P. Furmanski , D. Garcia-Gamez , S. Gardiner , G. Ge , S. Gollapinni , O. Goodwin , E. Gramellini , P. Green , H. Greenlee , W. Gu , R. Guenette , P. Guzowski , L. Hagaman , O. Hen , C. Hilgenberg , G. A. Horton-Smith , A. Hourlier , R. Itay , C. James , X. Ji , L. Jiang , J. H. Jo , R. A. Johnson , Y. -J. Jwa , D. Kalra , N. Kamp , N. Kaneshige , G. Karagiorgi , W. Ketchum , M. Kirby , T. Kobilarcik , I. Kreslo , I. Lepetic , K. Li , Y. Li , K. Lin , B. R. Littlejohn , W. C. Louis , X. Luo , K. Manivannan , C. Mariani , D. Marsden , J. Marshall , D. A. Martinez Caicedo , K. Mason , A. Mastbaum , N. McConkey , V. Meddage , T. Mettler , K. Miller , J. Mills , K. Mistry , A. Mogan , T. Mohayai , J. Moon , M. Mooney , A. F. Moor , C. D. Moore , L. Mora Lepin , J. Mousseau , M. Murphy , D. Naples , A. Navrer-Agasson , M. Nebot-Guinot , R. K. Neely , D. A. Newmark , J. Nowak , M. Nunes , O. Palamara , V. Paolone , A. Papadopoulou , V. Papavassiliou , S. F. Pate , N. Patel , A. Paudel , Z. Pavlovic , E. Piasetzky , I. D. Ponce-Pinto , S. Prince , X. Qian , J. L. Raaf , V. Radeka , A. Rafique , M. Reggiani-Guzzo , L. Ren , ' L. C. J. Rice , L. Rochester , J. Rodriguez Rondon , M. Rosenberg , M. Ross-Lonergan , G. Scanavini , D. W. Schmitz , A. Schukraft , W. Seligman , M. H. Shaevitz , R. Sharankova , J. Shi , J. Sinclair , A. Smith , E. L. Snider , M. Soderberg , S. Soldner-Rembold , P. Spentzouris , J. Spitz , M. Stancari , J. St. John , T. Strauss , K. Sutton , S. Sword-Fehlberg , A. M. Szelc , W. Tang , K. Terao , C. Thorpe , D. Totani , M. Toups , Y. -T. Tsai , M. A. Uchida , T. Usher , W. Van De Pontseele , B. Viren , M. Weber , H. Wei , Z. Williams , S. Wolbers , T. Wongjirad , M. Wospakrik , K. Wresilo , N. Wright , W. Wu , E. Yandel , T. Yang , G. Yarbrough , L. E. Yates , H. W. Yu , G. P. Zeller , J. Zennamo , C. Zhang

We present a combined analysis of the Pythia 8 event generator using accelerator data and evaluate its impact on air shower observables. Reliable simulations with event generators are essential for particle physics analyses, achievable…

High Energy Astrophysical Phenomena · Physics 2025-09-19 Michael Windau , Chloé Gaudu , Karl-Heinz Kampert , Kevin Kröninger

In this article, a framework for hadronic rescattering in the general-purpose Pythia event generator is introduced. The starting point is the recently presented space-time picture of the hadronization process. It is now extended with a…

High Energy Physics - Phenomenology · Physics 2020-10-28 Torbjörn Sjöstrand , Marius Utheim