# 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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# WG5

## Place

Location: Hotel Rincón del Arco
Room: Salón Giralda

## Files

Date: from 28 Nov 15:00 to 1 Dec 19:30

## Conveners

• 28 Nov 15:00 - 16:50
• Dr. Ortiz Velasquez, Antonio (ICN, UNAM)
• Blok, Boris (Technion Haifa)
• 28 Nov 17:20 - 19:00 WG5
• Dr. Ortiz Velasquez, Antonio (ICN, UNAM)
• Blok, Boris (Technion Haifa)
• 1 Dec 12:10 - 13:10 WG5
• Dr. Ortiz Velasquez, Antonio (ICN, UNAM)
• Blok, Boris (Technion Haifa)
• 1 Dec 18:50 - 19:30 Conclusions/Summary
• Dr. Ortiz Velasquez, Antonio (ICN, UNAM)
• Blok, Boris (Technion Haifa)

## Timetable | Contribution List

Displaying 14 contributions out of 14
Session: WG5
ATLAS measurements of correlations between particle pairs in relative azimuthal angle ($\Delta\phi$) and pseudorapidity separation ($\Delta\eta$), in $pp$ collisions at $\sqrt{s}$=2.76, 5.02 and 13~TeV, and in $p$+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$=5.02~TeV are presented. Prior measurements have shown that in $pp$ collisions with a large multiplicity of produced particles, a long-rang ... More
Presented by Dr. Deepak KAR on 1/12/2016 at 12:10
Session: WG5
The centrality-dependence of forward jet production in \pA\ collisions at the LHC has been found to grossly violate the Glauber model prediction in a way that depends on the $x$ in the proton. We argue that this modification pattern provides the first experimental evidence for $x$-dependent proton color fluctuation effects. On average, parton configurations in the projectile proton cont ... More
Presented by Prof. Mark STRIKMAN on 28/11/2016 at 23:40
Session: WG5
Our understanding of proton structure and of nuclear interactions at high energy would be advanced significantly with the definitive discovery of the gluon saturation regime. Forward particle production in hadron collisions at RHIC probes gluons at small-x where gluon density is high and expected to reach the saturation regime. Until today the golden channel at RHIC to observe strong hints of satu ... More
Presented by akio OGAWA
Session: WG5
In this contribution, we report on the multiplicity dependence of strange and multi- strange hadron production in pp collisions at √sNN = 5.02 TeV with the ALICE experiment. An enhanced production of strange and multi-strange hadrons relative to pions is observed for pp and p-Pb collisions where a large charged-particle multiplicity density is reached. The results in small systems are compared ... More
Presented by Prabhakar PALNI on 28/11/2016 at 16:30
Session: WG5
The talk will review the results recently reported by the CMS experiment on the study of light flavour and production of strangeness versus multiplicity in small systems
Presented by Valentina MARIANI on 28/11/2016 at 21:50
Session: WG5
on 28/11/2016 at 21:00
Session: WG5
Two-particle angular correlations are studied in proton-lead collisions at a nucleon-nucleon centre-of-mass energy of 5TeV, collected with the LHCb detector at the LHC. The analysis is based on data recorded in two opposing beam configurations, in which either the direction of the proton or that of the lead remnant is analysed. The correlations are measured as a function of relative pseudorapidity ... More
Presented by Prof. Zhu XIANGLEI on 1/12/2016 at 18:30
Session: WG5
We study the multiparton interaction dependence of the mean pT fluctuations for isotropic (soft) and jetty-like (hard) events with PYTHIA 8 for p-p collisions at .9, 2.76,7, 13 TeV for different pT intervals. Results are compared with published data at the LHC on corresponding multiplicity intervals, as well as with other models with different nature like EPOS and the String Percolation. The resul ... More
Presented by Dr. irais BAUTISTA on 1/12/2016 at 18:50
Session: WG5
We report the latest results of relative J/psi yield versus charged-particle multiplicity at mid-rapidity in p+p collisions at sqrt(s)=200 GeV with the STAR experiment. The measured J/psi yields and charged-particle multiplicities have been corrected for STAR detector acceptance and efficiency, and are compared to results from LHC experiments as well as theoretical calculations based on phenomen ... More
Presented by Prof. Zhenyu YE on 28/11/2016 at 18:00
Session: WG5
Recent measurements of Bose-Einstein correlations in pp, pPb and PbPb collisions are presented at different centre-of-mass energies of 0.9, 2.76, 5.02, 7 and 13 TeV.
Presented by Collaboration CMS
Session: WG5
Recent measurements performed in high-multiplicity proton-proton (pp) and proton-lead (p-Pb) collisions have revealed features that are reminiscent of lead-lead (Pb-Pb) phenomenology. The investigation of such phenomena requires a systematic study of light-flavor particle production as a function of charged particle multiplicity. ALICE has unique PID capabilities at mid-rapidity and excel ... More
Presented by Dr. Stefania BUFALINO on 28/11/2016 at 15:30
Session: WG5
Open and hidden heavy flavour production measurements in proton-proton (pp) collisions at the Large Hadron Collider (LHC) provide a test for perturbative Quantum Chromodynamics (pQCD) inspired models. In particular, the correlation of the heavy-flavour hadron yields with charged particles produced in hadronic collisions can shed light on their production mechanism and on the interplay between hard ... More
Presented by Dr. Lizardo VALENCIA PALOMO on 28/11/2016 at 18:20
Session: WG5
In this work, we propose a tool to reveal the origin of the collective-like phenomena observed in proton-proton collisions. We exploit the fundamental difference between the underlying mechanisms, color reconnection (CR) and hydrodynamics, which produce radial flow patterns in PYTHIA 8 and EPOS 3, respectively. Namely, the strength of the coupling between the soft and hard components which by cons ... More
Presented by Mr. Gyula BENCEDI on 28/11/2016 at 16:10
Session: WG5
High energy heavy ion collisions resulting in the production of Quark Gluon Plasma (QGP) provide an experimental system where the effects of multiple partonic interactions (MPI) can be studied. Small heavy ion systems such as d+Au collisions are of particular relevance to studying MPI because MPI effects can be better isolated. We can examine to what degree MPI plays a role in the initial collisio ... More
Presented by Theodore KOBLESKY on 28/11/2016 at 17:20
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