# 8th International Workshop on Multiple Partonic Interactions at the LHC

from 28 November 2016 to 2 December 2016
Hotel Rincón del Arco
Mexico/General timezone
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# WG2

## Place

Location: Hotel Rincón del Arco
Room: Salón Giralda

## Files

Date: from 29 Nov 09:00 to 2 Dec 09:40

## Conveners

• 29 Nov 09:00 - 10:50
• Werner, Klaus (Subatech)
• Ilten, Philip James (MIT)
• 29 Nov 11:20 - 13:00 WG2
• Werner, Klaus (Subatech)
• Ilten, Philip James (MIT)
• 29 Nov 15:00 - 15:20 WG2
• Ilten, Philip James (MIT)
• Werner, Klaus (Subatech)
• Ilten, Philip James (MIT)
• Werner, Klaus (Subatech)
• Werner, Klaus (Subatech)
• Ilten, Philip James (MIT)
• Werner, Klaus (Subatech)
• Ilten, Philip James (MIT)
• 1 Dec 11:30 - 12:10 WG2
• Ilten, Philip James (MIT)
• Werner, Klaus (Subatech)
• 2 Dec 09:00 - 09:40 Conclusions/Summary
• Ilten, Philip James (MIT)
• Werner, Klaus (Subatech)

## Timetable | Contribution List

Displaying 13 contributions out of 13
Session: WG2
We combine the IP-Glasma model of Color Glass Condensate with PYTHIA to study bulk observables in small colliding systems at LHC. This framework combines the Classical Yang-Mills dynamics of multi-gluon productions and a scheme of fragmentation based on Lund string model for the production of hadrons. In particular we study the high multiplicity events in which observations are often attributed to ... More
Presented by Prithwish TRIBEDY on 29/11/2016 at 15:00
Session: WG2
The DPMJET-III Monte Carlo event generator models interactions of hadrons, nuclei and photons with energies above a few GeV up to the highest cosmic ray energies. The photon-photon, photon-hadron and hadron-hadron part relies on a new version of the PHOJET Monte Carlo, that has been recently updated with new parton densities, the support for various baryon and meson projectiles and retuned paramet ... More
Presented by Anatoli FEDYNITCH on 29/11/2016 at 11:20
Session: WG2
on 29/11/2016 at 15:00
Session: WG2
During the last years collective effects in small systems, like p-p and p-A, have been under discussion. Evidence of flow-like patterns has been found in p-p collisions experimentally. Based on this results the proposal to use hydrodynamics to describe small systems, like in A-A collisions, looks tempting, but, some other mechanisms, among them prominently, Color Reconnection (CR), has shown colle ... More
Presented by Sergio IGA on 1/12/2016 at 11:50
Session: WG2
Monte Carlo event generators used at LHC are inspired by QCD and rely on phenomenological models where perturbative QCD cannot be used, e.g. for the description of the underlying event and hadronisation. This requires experimental data to constrain and tune the models, and to ultimately gain insights in the underlying physics. A Large Ion Collider Experiment (ALICE) at the LHC provides trac ... More
Presented by Dr. Jochen KLEIN on 29/11/2016 at 9:30
Session: WG2
The primary emphasis will be on proton-(anti)proton collisions, but can also heavy ion results related to Monte-Carlo studies.
Presented by Paolo GUNNELLINI on 29/11/2016 at 12:00
Session: WG2
The modelling of Minimum Bias (MB) and Underlying Event (UE) is a crucial component in the description of soft QCD processes. They are both described by multi-parton interactions (MPI) models, the result of proton collisions containing more than one partonic interaction due to collective and beam remnant effects. We present recent ATLAS studies aimed at improving the description of MPI models i ... More
Presented by Valentina Maria CAIRO on 29/11/2016 at 10:10
Session: WG2
I'll discuss the treatment of multiparton interactions in the framework of the QGSJET-II model. A particular attention will be paid to the assumptions concerning the momentum structure of constituent parton Fock states in hadrons and to the respective consequences for the predicted spectra of secondary hadrons. An impact on the predictions for cosmic-ray induced extensive air showers will be also ... More
Presented by Dr. Sergey OSTAPCHENKO on 29/11/2016 at 11:40
Session: WG2
Sibyll is one of the hadronic event generators commonly used in the simulation of extensive air showers. Since the last release, which dates back to the TeVatron era, modeling of hadronic interactions has seen development in several directions. For one the high energy frontier has been significantly moved up by the LHC, revealing discrepancies in the prediction of the total cross section, the ... More
Presented by Felix RIEHN on 29/11/2016 at 12:20
Session: WG2
EPOS3 is a minimum bias Monte-Carlo event generator used for Heavy Ion Collisions. It is successful in the description of particle spectra as well as flow-like observables and includes viscous hydrodynamics expansion, hadronic cascade, and heavy quark production. In the beginning, we will present the general features of the model and show that multiple interactions play a central role for both ... More
Presented by Dr. Benjamin GUIOT on 29/11/2016 at 10:30
Session: WG2
We discuss soft interactions as part of the Multiple Partonic Interaction model in the Monte Carlo event generator Herwig. The model for soft interactions has been updated and complemented with a model for diffractive final states. We describe the model and present simulation results in comparison to data from minimum bias interactions at the LHC.
Presented by Stefan GIESEKE on 29/11/2016 at 12:40
Session: WG2
The forward-backward multiplicity correlations are important for the overall event characterization and to extract information on non-pertubative hadronic processes. In this work we present a study of this correlations based on p+p collisions generated with PYTHIA event generator at LHC energies with different initial conditions of the events to show how it is related with the hadronization mec ... More
Presented by Mr. Edgar DOMINGUEZ ROSAS on 1/12/2016 at 17:30
Session: WG2
The wealth of data collected by LHCb during Run~I has allowed obtaining a wide selection of results in the unique phase space covered by its detector: pseudorapidity ($\eta$) range $2<\eta<5,$ low $p_T$ and low Bjorken $x$ values. These results are and will be used as reference in the tuning of Monte Carlo generators parameters influencing processes including but not limited to light and heavy qua ... More
Presented by Dr. Marco ADINOLFI on 29/11/2016 at 15:50
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