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A study of dijet production in proton-proton collisions was performed at sqrt(s) = 7 TeV for jets with pt > 35 GeV and abs(y) < 4.7 using data collected with the CMS detector at the LHC in 2010. Events with at least one pair of jets are…

High Energy Physics - Experiment · Physics 2013-01-24 CMS Collaboration

We construct a new Monte Carlo generator of events for neutrino interactions. The dynamical models for quasi-elastic reactions, $\Delta$ excitation and more inelastic events described by the DIS formalism with the PDFs modified according to…

High Energy Physics - Phenomenology · Physics 2009-11-11 Cezary Juszczak , Jaroslaw A. Nowak , Jan T. Sobczyk

The event generator Sar$t$re has been used extensively for simulations of electron-ion collisions in preparation for the Electron-Ion Collider (EIC). Sar$t$re simulates exclusive diffraction in $e$A collisions, in principle for any nuclear…

High Energy Physics - Phenomenology · Physics 2023-06-06 Jaswant Singh , Tobias Toll

ISAJET is a Monte Carlo event generator for $pp$, $\bar pp$, and $e^+e^-$ interactions at high energies. This document summarizes the physics underlying the program and describes how to use it.

High Energy Physics - Phenomenology · Physics 2007-05-23 H. Baer , F. E. Paige , S. D. Protopopescu , X. Tata

The Monte Carlo event generator GGRESRC is described. The generator is developed for simulation of events of the two-photon process e^+e^- --> e^+e^- R, where R is a pseudoscalar resonance, \pi^0, \eta, \eta', \eta_c, or \eta_b. The program…

High Energy Physics - Phenomenology · Physics 2010-10-29 V. P. Druzhinin , L. A. Kardapoltsev , V. A. Tayursky

We present the MBR (Minimum Bias Rockefeller) Monte Carlo simulation of (anti)proton-proton interactions and its implementation in the PYTHIA8 event generator. We discuss the total, elastic, and total-inelastic cross sections, and three…

High Energy Physics - Phenomenology · Physics 2012-08-07 R. Ciesielski , K. Goulianos

A search for exclusive or semi-exclusive photon pair production, pp to p(*) + photon pair + p(*) (where p(*) stands for a diffractively-dissociated proton), and the observation of exclusive and semi-exclusive electron pair production, pp to…

High Energy Physics - Experiment · Physics 2015-03-20 CMS Collaboration

New sets of parameters ("tunes") for the underlying-event (UE) modeling of the PYTHIA8, PYTHIA6 and HERWIG++ Monte Carlo event generators are constructed using different parton distribution functions. Combined fits to CMS UE proton-proton…

High Energy Physics - Experiment · Physics 2016-03-21 CMS Collaboration

Although elastic scattering of nucleons may look like a simple process, it presents a long-lasting challenge for theory. Due to missing hard energy scale, the perturbative QCD can not be applied. Instead, many phenomenological/theoretical…

Computational Physics · Physics 2014-02-11 Jan Kašpar

We have developed a Monte Carlo simulation describing the $2 \rightarrow 2$ scatterings of perturbatively produced, non-eikonally propagating high-energy partons with the quarks and gluons of the expanding QCD medium created in…

High Energy Physics - Phenomenology · Physics 2012-05-25 Jussi Auvinen , Kari J. Eskola , Hannu Holopainen , Thorsten Renk

The cross section of diffractive deep-inelastic scattering ep \rightarrow eXp is measured, where the system X contains at least two jets and the leading final state proton is detected in the H1 Forward Proton Spectrometer. The measurement…

High Energy Physics - Experiment · Physics 2015-06-03 H1 Collaboration

We report on the first measurement of the Central Exclusive Production process in proton-proton collisions: $pp \ \rightarrow \ p h^+ h^- p$ (where $h = \pi, K, p$) at the center-of-mass energy $\sqrt{s} = 510$ GeV with the STAR experiment…

High Energy Physics - Experiment · Physics 2026-05-29 Tomas Truhlar

Measurements of exclusive processes such as electroproduction, photoproduction, and Compton scattering are among the most sensitive probes of proton structure and coherent phenomena in quantum chromodynamics. The continuous electron beam at…

High Energy Physics - Phenomenology · Physics 2009-09-25 Stanley J. Brodsky , SLAC

We present a novel saturation and leading order collinear factorization based Monte-Carlo implementation of the EKRT model for computing QCD matter initial states in high-energy nuclear collisions. As new features the MC implementation…

High Energy Physics - Phenomenology · Physics 2025-10-31 Harri Niemi , Jussi Auvinen , Kari J. Eskola , Henry Hirvonen , Yuuka Kanakubo , Mikko Kuha

The lepton pair production in collisions of antiproton beam (E_beam = 14 GeV) with proton target is studied on the basis of event samples simulated with PYTHIA6 generator. Two types of quark level subprocesses are considered. The first one…

High Energy Physics - Phenomenology · Physics 2011-03-09 A. N. Skachkova , N. B. Skachkov , G. D. Alexeev

Based on QCD-inspired models for multiple jets production, we developed a Monte Carlo program to study jet and the associated particle production in high energy $pp$, $pA$ and $AA$ collisions. The physics behind the program which includes…

Nuclear Theory · Physics 2016-09-08 Xin-Nian Wang , Miklos Gyulassy

A process of Central Exclusive $\pi^+\pi^-$ production in proton-proton collisions and its theoretical description is presented. A possibility of its measurement, during the special low luminosity LHC runs, with the help of the ATLAS…

High Energy Physics - Experiment · Physics 2012-03-08 R. Staszewski , P. Lebiedowicz , M. Trzebinski , J. Chwastowski , A. Szczurek

A new Monte Carlo event generator for wide angle Bhabha scattering and muon pair production in $e^+e^-$ collisions is described. The program includes complete one-loop electroweak corrections, and QED radiative corrections. The O($\alpha$)…

High Energy Physics - Phenomenology · Physics 2011-07-19 J. H. Field , T. Riemann

We present the Forward Physics Monte Carlo (FPMC) designed to simulated central particle production with one or two leading intact protons and some hard scale in the event. The underlying interaction between protons or anti-protons through…

High Energy Physics - Phenomenology · Physics 2011-02-15 M. Boonekamp , A. Dechambre , V. Juranek , O. Kepka , M. Rangel , C. Royon , R. Staszewski

We consider exclusive $pp \to pp \pi^{+} \pi^{-}$ and $pp \to pp \pi^{+} \pi^{-}\pi^{+} \pi^{-}$ reactions at high energies. The calculation is based on a tensor pomeron model and the amplitudes for the processes are formulated in an…

High Energy Physics - Phenomenology · Physics 2016-10-14 Piotr Lebiedowicz , Otto Nachtmann , Antoni Szczurek