14 International Workshop on Multiple Parton Interactions at the LHC, MPI@LHC 2023

Nov 20, 2023, 9:00 AM → Nov 24, 2023, 5:00 PM Europe/London

Jocelyn Bell Burnell Lecture Theatre, Schuster Building (University of Manchester)

Andrew Pilkington (University Of Manchester), Darren Price (University of Manchester (GB)), Jeffrey Forshaw, Jonathan Richard Gaunt (University of Manchester (GB)), Mike Seymour (University of Manchester (GB))

MPI@LHC 2023 is the thirteenth conference of a series of successful joint theory/experiment workshops that bring together the world's leading experts from theory and LHC experiments to discuss the latest progress on the physics relevant to the Multiple Partonic Interactions.

This year it will take place in person at the University of Manchester.

The conference will cover the following topics, divided in working groups:

• WG1: Minimum Bias, Underlying Event and Monte Carlo generators
• WG2: Double Parton Scattering
• WG3: High multiplicities and small systems
• WG4: Diffraction and small-x
• WG5: Heavy Ion collisions

 

Previous editions of the workshop:

• MPI@LHC'22 Madrid, Spain
• MPI@LHC'21 Lisbon, Portugal
• MPI@LHC'19 Prague, Czech Republic
• MPI@LHC'18 Perugia, Italy
• MPI@LHC'17 Shimla, India
• MPI@LHC'16 San Cristóbal de las Casas, Mexico
• MPI@LHC’15 Trieste, Italy
• MPI@LHC'14 Krakow, Poland
• MPI@LHC'13 Antwerp, Belgium
• MPI@LHC'12 CERN Geneva, Switzerland
• MPI@LHC'11 DESY Hamburg, Germany
• MPI@LHC'10 Glasgow, Scotland
• MPI@LHC'08 Perugia, Italy

Monday, November 20

1 Welcome and introduction

Speaker: Jonathan Richard Gaunt (University of Manchester (GB))

WG3 track

Conveners: Christian Bierlich (Lund University (SE)), Fabio Colamaria (INFN, Sezione di Bari (IT))

2 Heavy-quark production and hadronisation as a function of event multiplicity with ALICE

Speaker: Andrea Rossi (INFN, Padova (IT))

2023Nov20MPI_Rossi_vF.pdf

3 Updates on junction formation and charm production in PYTHIA

Speaker: Javira Altmann

Junction fragmentation.pdf

4 ALICE measurements of particle production as a function of event topology in small systems

Speaker: Sushanta Tripathy (CERN)

EventClassifiers_Sushanta_MPI2023_v4.pdf

5 Probing the Mechanisms of Strangeness Enhancement in Small Systems with ALICE

Speaker: Roman Nepeivoda (Lund University (SE))

MPI@LHC_NR_v3.pdf

6 Quarkonium production as a function of charged-particle multiplicity with ALICE: A probe for MPI in pp and p-Pb collisions

Speaker: Chi Zhang (Université Paris-Saclay (FR))

MPI_ALICE_Chi_ZHANG_slides_vf.pdf

10:50 AM Coffee break

WG2 track

7 Double Parton Distribution Functions on the Lattice

Speaker: Daniel Reitinger

MPI Manchester 2023.pdf

8 Double transverse momentum dependent parton distributions matched to DPDFs

Speaker: Oskar Grocholski

MPI2023_Grocholski.pdf

9 Valence and sea parton correlations in double parton scattering from data

Speakers: Edgar Huayra, Emmanuel Gräve de Oliveira (UFSC, Brazil)

MPI2023.pdf

10 Hot spot model of nucleon and double parton scattering

Speaker: Boris Blok (Physics Department)

manchester24.pdf

12:30 PM Lunch

WG1 track

Conveners: Andrzej Konrad Siodmok (Jagiellonian University (PL)), Matt LeBlanc (University of Manchester (GB))

11 Pythia Overview

Speaker: Prof. Peter Skands (Monash University (AU))

23-MPIatLHC-Pythia.pdf

12 Sherpa Overview

Speaker: Peter Meinzinger

MPI@LHC-2023.pdf

13 Herwig Overview

Speaker: Stefan Gieseke (Karlsruhe Institute of Technology)

manchester23.pdf

14 ATLAS Overview

Speaker: Matt LeBlanc (University of Manchester (GB))

20231120_MLB_MPI2023.pdf

15 CMS Overveiw

Speaker: Cristian Baldenegro Barrera 🎉 (Sapienza Università di Roma (IT))

Cristian_MPI@LHC_v2.pdf

16 STAR Overview

Speaker: Dr Leszek Krzysztof Kosarzewski (Ohio State University)

MPI_LK_2023_11_20_v6.pdf

4:00 PM Coffee break

WG2 track: REMOTE TALKS

17 TPS in pp and DPS in pA

Speaker: Huasheng Shao (Centre National de la Recherche Scientifique (FR))

Shao_MPIatLHC2023.pdf

WG3 track: REMOTE BLOCK

18 Recent heavy-flavour results in small systems with ATLAS and CMS

Speaker: Dr Georgios Krintiras (The University of Kansas (US))

MPI_2023_GKK.pdf

19 Collectivity in Small Systems at RHIC

Research into surprising effects found in collisions of a light nucleus with a heavy nucleus is one of the main pillars of present-day research in high energy nuclear physics, and the discovery of quark-gluon plasma formation in these small-volume collisions has fomented major developments in relativistic hydrodynamics. The Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory has conducted a small system geometry scan, comprising collisions of three different systems with three different intrinsic geometries. The experimental results demonstrate the translation of collision geometry into final state correlations, with different contributions from intrinsic geometry vs sub-nucleonic fluctuations in different kinematic regions. In this talk we summarize the latest results from both the PHENIX and STAR collaborations.

Speaker: Ron Belmont (University of North Carolina at Greensboro)

mpi23.pdf

6:00 PM Reception drinks

Tuesday, November 21

Remote session: Mixed

20 Double Parton Distributions from Euclidean Lattice

Double parton distributions characterize the correlated parton structure of hadrons, and play an important role in describing double parton scattering processes in hadron collisions. In this talk, I'll show how they can be directly computed from correlations of equal-time nonlocal Euclidean operators on the lattice in the large hadron momentum limit.

Speaker: Jianhui Zhang (Chinese University of Hong Kong)

dpd from lattice.pdf

21 Associated production of heavy quarkonia and D mesons in the parton Reggeization approach

Speaker: Vladimir Saleev

MPILHC_4.pdf

WG4 session

22 Predictions for Neutrinos and New Physics from Forward Heavy Hadron Production at the LHC

Speaker: Dr Luca Rottoli (University of Zurich (CH))

rottoli_forwardhadron_Manchester.pdf

10:20 AM Coffee break

WG5 track

Conveners: Jack Holguin, Valentina Zaccolo (Universita e INFN Trieste (IT))

23 Energy-energy correlations in heavy-ion collisions

Speaker: Carlota Andres (Ecole Polytechnique, CPHT)

andrescMPI2023.pdf

24 Event-by-event hadron correlations in ALICE experiment

Speaker: Ante Bilandzic (Technische Universitaet Muenchen (DE))

Bilandzic_MPI@LHC-v9.pdf

25 Light-nuclei identification in fixed-target measurements for cosmic rays physics

Speaker: Chiara Lucarelli (Universita e INFN, Firenze (IT))

MPI23_v1.pdf

26 Extracting the speed of sound in the strongly interacting matter in ultrarelativistic nuclear collisions

Speaker: Austin Alan Baty (University of Illinois Chicago)

Baty_MPIatLHC_2023_SpeedOfSoundCMS_v2.pdf

27 Hadronic interactions in Angantyr with applications to hadronic cascades

Speaker: Marius Utheim

12:30 PM Lunch

WG3 track

28 Quark spin in string hadronization

Speaker: Albi Kerbizi (Universita e INFN Trieste (IT))

Kerbizi_MPI@LHC2023.pdf

29 Searching collective-like effects for heavy-flavour in small systems with ALICE

Speaker: Yoshini Bailung (Indian Institute of Technology Indore (IN))

MPI@LHC23-Yoshini-vF.pdf

30 Investigating collective effects in small collision systems using PYTHIA8 and EPOS4 simulations

Speaker: Alexandru Manea (Institute of Space Science (RO))

amanea_talkMPI2023.pdf

31 Charged-particle production as a function of the relative transverse activity classifier in pp, p--Pb, and Pb--Pb collisions at the LHC

Speaker: Paola Vargas Torres (Universidad Nacional Autonoma (MX))

MPI-PresentationRT_v3.pdf

32 Fitting a deep generative hadronization model

Speaker: Andrzej Konrad Siodmok (Jagiellonian University (PL))

MPIatLHC_Siodmok_2023.pdf

33 Quarkonium as a probe of multiple parton interaction and collectivity in pp collisions with ALICE

Speaker: Ida Storehaug (University of Oslo (NO))

QuarkoniumMPI_Storehaug.pdf

4:00 PM Coffee break

WG2 track

34 Latest measurements of DPS using Quarkonia from all experiment

Speaker: Maria Elena Ascioti (Universita e INFN, Perugia (IT))

DPS_at_LHC_MPI_Manchester_Ascioti.pdf

35 Six-jet production via double and triple parton scatterings in p-p and p-Pb collisions at the LHC

Speaker: Marina Maneyro (Universidad de la Republica, Uruguay)

SixjetTPS_final.pdf

36 Exploring high-purity multi-parton scattering at hadron colliders

Speaker: Dr Luca Rottoli (University of Zurich (CH))

rottoli_MPI_Manchester.pdf

37 Numerical impact of NLO splitting in double parton distributions

For short distances between the two probed partons double parton distributions (DPDs) are dominated by a perturbative $1 \to 2$ splitting which can be calculated in perturbation theory. In this talk I will briefly sketch how this splitting can be computed and then discuss the numerical impact of including the NLO contribution to this splitting. Besides modifying the overall size and shape of DPDs and DPD luminosities, one finds that the NLO contribution is crucial in reducing different kinds of scale uncertainties which are rather large at LO.

Speakers: Peter Josef Ploessl, Peter Ploessl

2023_11_21_MPI@LHC2023_Ploessl.pdf

38 Multiple Parton Scattering: Symmetrising Pythia

Speaker: Ms Lawrie Smith

MPI@LHC.pdf

MPI@LHC.pptx

Wednesday, November 22

WG2 track

39 Latest measurements using Hard Objects from all experiment

Speaker: Ankita Mehta (University of Hamburg)

MPIatLHC2023_LHC_dpsWW_am.pdf

40 Evolution of colour dependent double parton distributions: a quantitative study

Speaker: Markus Diehl

mpi.pdf

41 Towards Double Parton Distributions from First Principles using Large Momentum Effective Theory

Speaker: Rudi Rahn (University of Bern)

MPI23_Rahn.pdf

42 Triple parton scatterings in high-energy proton-proton and proton-nucleus collisions

Speaker: David d'Enterria (CERN)

dde_TPS_pp_pA_MPI2023_nov23.pdf

10:20 AM Coffee break

WG5 track

Conveners: Jack Holguin, Valentina Zaccolo (Universita e INFN Trieste (IT))

43 Learning about jet quenching from event generators

Speaker: Dr Guilherme Milhano (LIP-Lisbon & CERN TH)

MPI2023Milhano.pdf

44 Hydrodynamizing Jets

Speaker: Daniel Pablos Alfonso

mpilhc23_pablos.pdf

45 Medium modifications to charm production

Speaker: Jasmine Therese Brewer (CERN)

JasmineBrewer-MPI23.pdf

JasmineBrewer-MPI23.pptx

46 Medium-induced yield enhancement in small and large collision systems

Speaker: Mattia Faggin (Universita e INFN Trieste (IT))

2023Nov_MPIatLHC_mfaggin_v6.pdf

47 Exploring medium modifications to jet substructure in heavy-ion collisions (REMOTE)

Speaker: Ezra Lesser (University of California Berkeley (US))

2023-11-22 -- Exploring medium modifications to jet substructure in heavy-ion collisions.pdf

12:30 PM Lunch

WG1 track: REMOTE TALKS

Conveners: Andrzej Konrad Siodmok (Jagiellonian University (PL)), Matt LeBlanc (University of Manchester (GB))

48 EPOS4 overview

Speakers: Klaus WERNER, Klaus WERNER (subatech)

mpi.pdf

49 Probing factorization violation with vector angularities

Speaker: Wouter Waalewijn (University of Amsterdam)

MPI@LHC 2023.pdf

50 Tuning Pythia for Forward Physics Experiments

Speaker: Max Fieg (University of California Irvine (US))

Tuning_Pythia_MPI.pdf

51 Color Reconnection Effects in J/ψ Hadroproduction

Speakers: Anna Maria Stasto (Pennsylvania State University (US)), Anna Stasto, Anna Stasto

52 ALICE UE/MPI/Hadronization talk

Speaker: Haidar Masud Alfanda (Central China Normal University CCNU (CN))

Haidar_MPI2023_v2.pdf

Remote session: Mixed

53 Recent results on soft and hard diffraction at the LHC

Speaker: Christophe Royon (The University of Kansas (US))

mpi2023.pdf

4:00 PM Coffee break

4:30 PM Free time to visit Manchester Museum

Thursday, November 23

9:00 AM Conference Excursion: Jodrell Bank Observatory

WG4 session

Conveners: Cristian Baldenegro Barrera 🎉 (Sapienza Università di Roma), Dr Francesco Giovanni Celiberto (UAH Madrid)

54 Results on forward particle production and energy flow at the LHC

Speakers: Oscar Adriani (Universita e INFN, Firenze (IT)), Oscar Adriani

Adriani_MPI@LHC_231123.pdf

55 Recent results of the FASER experiment

Speaker: Michaela Queitsch-Maitland (University of Manchester (GB))

FASER_MQueitschMaitland_MPI@LHC.pdf

56 Small-x resummation for parton distribution functions

Speaker: Federico Silvetti

MPI23_Silvetti.pdf

3:30 PM Coffee break

WG1 track

Conveners: Andrzej Konrad Siodmok (Jagiellonian University (PL)), Matt LeBlanc (University of Manchester (GB))

57 LHCb Overview

Speaker: Imanol Corredoira (Universidade de Santiago de Compostela (ES))

icorredo_MPI_v2.pdf

58 Two approaches to hadronization reweighting

Speaker: Christian Bierlich (Lund University (SE))

cbierlich.pdf

59 Hadronization and Decay of Excited Heavy Hadrons in Herwig 7

Speaker: MOHAMMAD,REZA MASOUMINIA

Aidin-MPIatLHC.pdf

60 Colour Evolution and Infrared Physics

Speakers: Simon Plaetzer (ITP, Universitaet Karlsruhe), Simon Platzer (University of Graz (AT))

slides-compressed.pdf

61 Energy dependence of underlying-event observables with ALICE at the LHC

Speaker: Feng Fan (Central China Normal University CCNU (CN))

MPI23_feng_v4.pdf

62 Angular Correlations of Baryons as a Probe for Colour Reconnection and Hadronization

Speaker: Stefan Kiebacher

StefanKiebacher_MPI_at_LHC.pdf

8:00 PM Conference Dinner

Friday, November 24

WG4 session

Conveners: Cristian Baldenegro Barrera 🎉 (Sapienza Università di Roma), Dr Francesco Giovanni Celiberto (UAH Madrid)

63 Results on two-photon fusion processes at the LHC

Speaker: Lydia Audrey Beresford (Deutsches Elektronen-Synchrotron (DE))

Beresford_MPIatLHC_Nov23.pdf

64 Results on photonuclear interactions at the LHC

Speaker: Orlando Villalobos Baillie (University of Birmingham (GB))

Results on Photonuclear Interactions at the LHC.pdf

65 Double Parton Scattering at the EIC and double J/ψ photo production

Speakers: Matteo Rinaldi, Matteo Rinaldi

Rinaldi.pdf

66 High-energy logarithmic corrections within the HEJ framework

Speaker: Emmet Byrne

MPI_at_LHC_EB.pdf

67 Next-to-leading BFKL predictions for Mueller-Tang jets at LHC

Speaker: Dimitri Colferai (University of Florence (Italy))

colferai.pdf

10:40 AM Coffee break

68 WG1 Summary

Speakers: Andrzej Konrad Siodmok (Jagiellonian University (PL)), Matt LeBlanc (University of Manchester (GB))

MPI2023-2.pdf

69 WG2 summary

Speakers: Oleh Fedkevych (Georgia State University and CFNS), Stefanos Leontsinis (University of Zurich (CH))

merged_wg2.pdf

70 WG3 summary

Speakers: Christian Bierlich (Lund University (SE)), Fabio Colamaria (INFN, Sezione di Bari (IT))

MPI@LHC - WG3 Review (Experimental).pdf

wg3-theory-summary.pdf

12:40 PM Lunch

71 WG4 summary

Speakers: Cristian Baldenegro Barrera 🎉 (Sapienza Università di Roma (IT)), Dr Francesco Giovanni Celiberto (UAH Madrid)

MPI_2023_WG4_Summary_Celiberto.pdf

WG4ExperimentalSummary.pdf

72 WG5 summary

Speakers: Jack Holguin, Dr Jack Holguin (CPHT, Ecole Polytechnique), Valentina Zaccolo (Universita e INFN Trieste (IT))

SummaryMPI@LHC.pdf