Conveners
WG2: MC Development and Tuning
- Paolo Gunnellini (Deutsches Elektronen-Synchrotron (DE))
- Stefan Gieseke
WG2: MC Development and Tuning
- Stefan Gieseke
- Paolo Gunnellini (Deutsches Elektronen-Synchrotron (DE))
WG2: MC Development and Tuning
- There are no conveners in this block
WG2: MC Development and Tuning
- There are no conveners in this block
Monte Carlo Tutorial - Part I
Monte Carlo Tutorial - Part II
In hot and dense environments both in heavy ion collisions and high multiplicity proton-proton events, Lund string fragmentation must be modified to take into account effects from the interaction between strings prior to and in the hadronisation. One such modification is colour reconnections, where oppositely directed colour fields may cancel eachother. But there is also a possibility for the...
The core-corona picture implemented in the EPOS~3 model has successfully described the multiplcity dependence of particle production in proton--proton (pp) and proton--nucleus collisions at LHC energies.
The inclusion of viscous hydrodynamics plays a key role in describing the observed features of data. It suggests an interpretation of new phenomena assuming the formation of a small drop of...
New CMS PYTHIA 8 event tunes are presented. The new tunes are obtained using minimum bias and underlying event observables using Monte Carlo configurations with consistent parton distribution functions and strong coupling constant values in the matrix element and the parton shower. Validation and performance studies are presented by comparing the predictions of the new tune to various soft-...
The status of recent studies of modern Monte Carlo generator setups for the pair production of top quarks at the LHC. Samples at a center of mass energy of 13 TeV have been generated for a variety of generators and with different generator configurations. The predictions from these sample are compared to ATLAS data for a variety of kinematic observables.
The predictions of different Monte Carlo generators for QCD jet production, both in multijets and for jets produced in association with other objects, are presented. Recent improvements in showering Monte Carlos provide new tools for assessing systematic uncertainties associated with these jets. Studies of the dependence of physical observables on the choice of shower tune parameters and new...
We review the current model for soft interactions which is based on multiperipheral particle kinematics in the Monte Carlo event generator Herwig 7.
Furthermore we investigate the consequences of additional modifications related to
soft physics in pp collisions with respect to hadronic flavour observables.
Angantyr is a new model for collisions involving heavy nuclei in Pythia8. It is inspired by the old Fritiof model, but includes more perturbative physics and a more careful consideration of fluctuations in nucleon-nucleon cross sections, and the related diffractive processes. In the current implementation in Pythia8 parton-level nucleon-nucleon minimum bias events are stacked together and...
Several new double parton scattering (DPS) tunes are constructed in order to investigate the compatibility between the values of the UE parameters determined from fitting UE observables and the values determined from fitting DPS-sensitive observables. In addition, the predictions of the DPS-based tunes are tested against UE observables at 13 TeV.
A study of the latest color-reconnection models in QCD is performed with CMS data. The so called MPI-based, QCD-inspired and gluon-move models are studied within Pythia8, and the tuning parameters for the color reconnection and multiple parton interactions are extracted simultaneously from data. The different tunes are compared with top quark distributions.
