Name: UPC2025: The second international workshop on the physics of Ultra Peripheral Collisions
Start: 2025-06-09T08:00:00+03:00
End: 2025-06-13T20:00:00+03:00
Location: Saariselkä, Finland

UPC2025: The second international workshop on the physics of Ultra Peripheral Collisions

from Monday, 9 June 2025 (08:00) to Friday, 13 June 2025 (20:00)

Monday, 9 June 2025

08:15 Registration: Registration
Registration
08:15 - 10:00
08:30 Early career researcher program: Early career researcher morning
Early career researcher morning
08:30 - 10:00
Contributions

09:00 Lecture 2: UPC theory - Samuel WALLON (IJCLab)
10:00 Breaks: Morning coffee
Morning coffee
10:00 - 10:25
10:25 Overview: Overview session 1
Overview session 1
10:25 - 12:10
Contributions

10:25 Welcome - Heikki Mäntysaari Ilkka Helenius (University of Jyväskylä)

10:40 Experimental overview on UPC results at STAR - Chi Yang (Shandong University)

11:10 Experimental overview on UPC results from CMS - Zaochen Ye (South China Normal University)

11:40 Experimental overview on UPC results from LHCb - Ronan Mcnulty (University College Dublin (IE))
12:10 Lunch
Lunch
12:10 - 13:40
13:40 Overview: Overview session 2
Overview session 2
13:40 - 15:10
Contributions

13:40 Experimental overview on UPC results from ALICE - Adam Matyja (Polish Academy of Sciences (PL))

14:10 Experimental overview on UPC results from ATLAS - Valerie Lang (University of Freiburg (DE))

14:40 Overview of different approaches to exclusive production at small x - Tuomas Lappi
15:10 Breaks: Coffee
Coffee
15:10 - 15:40
15:40 Overview
15:40 - 17:40
Contributions

15:40 Monte Carlo event generators for UPCs and photon-mediated processes - Lucian Alexander Harland-Lang (University College London)

16:10 Partonic structure of nuclei from UPCs - Vadim Guzey (University of Jyvaskyla)

16:40 Probing New Physics in UPCs: Recent results and prospects - Victor Gonçalves (Universidade Federal de Pelotas)

17:10 Collectivity in UPC and p+A collisions - Bjoern Schenke (Brookhaven National Lab)
18:00 Welcome drink
Welcome drink
18:00 - 18:30

19:00 Dinner
Dinner
19:00 - 21:00
Tuesday, 10 June 2025
09:00 Exclusive processes and small-x physics
09:00 - 10:40
Contributions

09:00 Probing nuclear gluon distributions via coherent $J/\Psi$ and $\Psi(2S)$ photoproduction in ultraperipheral PbPb collisions at CMS - Daniela Hikari Yano (Rice University (US))

09:20 Measurements of $J/\psi$ in ultraperipheral Pb+Pb collisions at $\sqrt{s_\mathrm{NN}}=5.36$ TeV with the ATLAS detector - Pawel Rybczynski (AGH University of Krakow (PL))

09:40 First measurement on the energy and Mandelstam-t dependence of both coherent and incoherent J/Ѱ photonuclear production - Jesus Guillermo Contreras Nuno (Czech Technical University in Prague (CZ)) Vendulka Filova (Czech Technical University in Prague (CZ))

10:00 First Study of Exclusive Production of Multi-Hadron Final States in Ultraperipheral Collisions - Amrit Gautam (The University of Kansas (US))

10:20 Incoherent J/psi photoproduction in UPC as a probe of the subnucleonic structure of nuclei - Xueli Hua (South China Normal University (CN))
10:40 Breaks: Morning coffee
Morning coffee
10:40 - 11:10
11:10 Exclusive processes and small-x physics
11:10 - 13:10
Contributions

11:10 Nuclear suppression in diffractive vector meson production within the color glass condensate framework - Hendrik Roch (Wayne State University)

11:30 Gluon saturation effects in exclusive heavy vector meson and in $c \bar{c}$, $b \bar{b}$ photoproduction - Christophe Royon (The University of Kansas (US))

11:50 Coherent J/psi photoproduction in AA collisions with nuclear overlap - Ionut Cristian Arsene (University of Oslo (NO))

12:10 Centrality dependence in J/Ψ Photoproduction in pp. pA and AA Collisions - Maria Beatriz De Leone Gay (Universidade Federál Do Rio Grande Do Sul (BR))

12:30 Finite-size effects in color-glass condensate and implications for exclusive vector meson production in ultra-peripheral collisions - Jani Penttala (UCLA)

12:50 Transverse momentum dependent factorization in the target fragmentation region at small-x - Farid Salazar (Temple University)
13:10 Breaks: Lunch
Lunch
13:10 - 14:40
14:40 Exclusive processes and small-x physics
14:40 - 16:20
Contributions

14:40 Onset of gluon saturation through incoherent J/psi production at large |t| - Alexandra Ridziková (Czech technical university in Prague FNSPE)

15:00 Exclusive photoproduction of a photon-pion pair in a saturation framework - Joseph Yarwick (IJC Lab, University Paris-Saclay)

15:20 Momentum transfer dependence in electronuclear production of heavy quarkonia revisited: Green function formalism - Jaroslava Obertova (Czech Technical University in Prague)

15:40 Recent advances on the solution of the LO and NLO BK equation - Jesus Guillermo Contreras Nuno (Czech Technical University in Prague (CZ))

16:00 Beyond leading-power effects in DVMP at small-x - Michael Fucilla (Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405, Orsay, France)
16:20 Afternoon coffee
Afternoon coffee
16:20 - 16:50
16:50 Exclusive processes and small-x physics
16:50 - 18:10
Contributions

16:50 Probing generalised parton distributions in exclusive meson-meson production - David PEREZ (IJCLAB)

17:10 Exclusive vector-quarkonium photoproduction at NLO in collinear factorisation with evolution of the generalised parton distributions and high-energy resummation - Jean-Philippe Lansberg (Université Paris-Saclay (FR))

17:30 Prospects for probing generalised parton distributions in 2 to 3 exclusive processes - Saad Nabeebaccus (University of Manchester)

17:50 Probing the Nuclear and Electromagnetic Structure of Heavy Nuclei at STAR - Xihe Han (The Ohio State University)
18:10 Discussion sessions: Exclusive processes
Exclusive processes
18:10 - 19:00
Contributions

18:10 Discussion: Vector mesons - Chris Flett (IJCLab)
19:00 Dinner
Dinner
19:00 - 21:00
Wednesday, 11 June 2025
09:00 Exclusive processes and small-x physics
09:00 - 09:20
Contributions

09:00 Coherent J/psi photoproduction in AA collisions with nuclear overlap from RHIC to LHC energies: theory perspective - Wangmei Zha (University of Science and Technology of China (CN))
09:20 New directions in UPCs, connection to heavy-ion physics, and synergies with EIC and other facilities
09:20 - 09:40
Contributions

09:20 FoCal in ALICE - Sami Sakari Rasanen (University of Jyvaskyla (FI))
09:40 Monte Carlo event generators for UPCs and photon-mediated processes
09:40 - 10:20
Contributions

09:40 Recent development on gamma gamma collisions at hadron colliders - Nicolas Crépet (IJCLab)

10:00 Upcgen: An event generator for dilepton pair production in UPCs - Paul Alois Buhler (Stefan Meyer Institute for Subatomic Physics (SMI), Austrian Academy of Sciences (AT))
10:20 Breaks: Morning coffee
Morning coffee
10:20 - 11:00
11:00 Monte Carlo event generators for UPCs and photon-mediated processes
11:00 - 12:40
Contributions

11:00 The STARlight Monte Carlo Event Generator - Janet Elizabeth Seger (Creighton University (US)) Janet Seger (Creighton University (US))

11:20 Dijet Photoproduction in POWHEG-Box - Alexander Feike (University of Münster)

11:40 MC@NLO for UPCs in Sherpa - Peter Meinzinger (Zürich University)

12:00 Photo-nuclear collisions in Pythia 8 - Ilkka Helenius (University of Jyväskylä)

12:20 Describing UPC data with the Sartre event generator - Tobias Toll Vaidehi Nattoja (Indian Institute of Technology, Delhi)
12:40 Breaks: Lunch
Lunch
12:40 - 14:10

14:10 Excursion: Excursion
Excursion
14:10 - 18:10

19:30 Dinner
Dinner
19:30 - 21:30
Thursday, 12 June 2025
09:00 Inclusive and diffractive processes and photon, proton and nuclear structure
09:00 - 10:40
Contributions

09:00 Probing the proton’s correlated spatial structure through UPCs - liuti simonetta

09:20 Inclusive and diffractive dijet production with the ATLAS experiment - Benjamin Jacob Gilbert (Lawrence Livermore Nat. Laboratory (US))

09:40 Coulomb Dissociation Measurement in Isobaric Collisions at $\sqrt{s_{NN}} = 200$ GeV with the STAR Experiment - Huda Nasrulloh (University of Science and Technology of China)

10:00 Production of $\pi$, $K$, p in inclusive UPC events in ALICE - Simone Ragoni (Creighton University (US))

10:20 Di-hadron spectroscopy in PbPb UPC events measured in LHCb - Cesar Luiz Da Silva (Los Alamos National Laboratory (US))
10:40 Breaks: Morning coffee
Morning coffee
10:40 - 11:10
11:10 Inclusive and diffractive processes and photon, proton and nuclear structure
11:10 - 12:50
Contributions

11:10 Measurement of inclusive D0 production in UPCs with CMS - Jordan Lang (Massachusetts Inst. of Technology (US))

11:30 Inclusive UPC charm photoproduction in ALICE - Sigurd Nese (University of Oslo (NO))

11:50 Inclusive $\mathrm{D}^0$ photoproduction in ultra-peripheral collisions - Patricia Gimeno-Estivill

12:10 Predictions for Inclusive Charm Photoproduction in Ultraperipheral Collisions at the LHC Using FONLL - Anna Maria Stasto (Pennsylvania State University (US))

12:30 Inclusive quarkonium photoproduction at the LHC - Kate Lynch (University College Dublin (IE) and Université Paris-Saclay (FR))
12:50 Breaks: Lunch
Lunch
12:50 - 14:20
14:20 Photon-photon physics, precision tests of SM and BSM
14:20 - 16:00
Contributions

14:20 Measurement of the tau anomalous magnetic moment using Ultra-peripheral collisions with the ALICE detector in Run 3 Pb—Pb data - Roman Lavicka (Austrian Academy of Sciences (AT))

14:40 Tau-lepton pair production via di-photon fusion in ultra-peripheral heavy-ion collisions at the ATLAS detector - Kartik Deepak Bhide (University of Freiburg (DE))

15:00 Recent results on exclusive ditau production in proton-proton and lead-lead from CMS - Michael Murray (The University of Kansas (US))

15:20 Progress in NLO calculations for gamma-gamma physics - Huasheng Shao (Centre National de la Recherche Scientifique (FR))

15:40 Impact of inelastic corrections on $\gamma \gamma \to \gamma \gamma$ scattering from UPC at the LHC - Antoni Szczurek
16:00 Breaks: Afternoon coffee
Afternoon coffee
16:00 - 16:30
16:30 Photon-photon physics, precision tests of SM and BSM
16:30 - 17:30
Contributions

16:30 ATLAS measurements of coincident photon induced processes in ultra-peripheral Pb+Pb collisions - Lucy Lewitt (University of Sheffield (GB))

16:50 From photons to dikaon - Theoretical Insights into $K^+K^-$ Production in Nuclear Collisions - Mariola Klusek-Gawenda (Institute of Nuclear Physics Polish Academy of Sciences)

17:10 Observation of π+π−π+π− and π+π− final state photoproduction in ultraperipheral heavy-ion collisions at √sNN = 200 GeV at the STAR detector - David Tlusty (Creighton University)
17:30 Discussion sessions: Thursday discussion
Thursday discussion
17:30 - 18:10
Contributions

17:30 Discussion session: UPCs at the start of EIC running - Michael Murray (The University of Kansas (US))
18:30 IPC meeting
IPC meeting
18:30 - 19:30

20:00 Conference dinner
Conference dinner
20:00 - 22:00
Friday, 13 June 2025
09:30 Photon-photon physics, precision tests of SM and BSM
09:30 - 10:50
Contributions

09:30 Measurements of proton-antiproton pairs from QED vacuum excitation in Au+Au ultra-peripheral collisions at $\sqrt{s_{\rm{NN}}} = $ 200 GeV from STAR - Xinbai Li (University of Science and Technology of China)

09:50 Probing the photon Wigner distribution with dilepton production in UPCs - Luca Maxia (LPTHE - CNRS)

10:10 azimuthal modulation in photon-induced processes - Yajin Zhou (Shandong University)

10:30 Investigating Entanglement Enabled Spin Interference in photonuclear $\rho^0 \rightarrow \pi^+ \pi^-$ and $\gamma \gamma \rightarrow \pi^+ \pi^-$ in Au+Au collisions at STAR - Samuel Corey
10:50 Breaks: Morning coffee
Morning coffee
10:50 - 11:20
11:20 Photon-photon physics, precision tests of SM and BSM
11:20 - 11:40
Contributions

11:20 New Constraints on the Existence of Massive Monopoles in Ultra-Peripheral Heavy Ion Collisions with ATLAS - Krzysztof Ciesla (AGH University of Krakow (PL))
11:40 New directions in UPCs, connection to heavy-ion physics, and synergies with EIC and other facilities
11:40 - 13:10
Contributions

11:40 UPC Collectivity measurements - Sruthy Jyothi Das (University of Illinois at Chicago (US))

12:10 Probing QCD Collectivity over the Widest Rapidity Gap in Photonuclear Collisions at CMS - Nicole Lewis (Rice University (US))

12:30 Search for Collectivity in Photo-nuclear Processes at RHIC using STAR Detector - Souvik Paul (Stony Brook University)

12:50 Negative flow as a signature of microscopic collective flow - Peter Christiansen (Lund University (SE))
13:10 Breaks: Lunch
Lunch
13:10 - 14:50
14:50 New directions in UPCs, connection to heavy-ion physics, and synergies with EIC and other facilities
14:50 - 15:50
Contributions

14:50 Probing Nuclear Structure through Ultra-Peripheral Heavy-Ion Collisions - James Daniel Brandenburg (Ohio State University (US))

15:10 Photonuclear production of strange particles in ultra-peripheral Pb--Pb collisions with ALICE - Roman Nepeivoda (Lund University (SE))

15:30 Nucleon energy correlator for the odderon - Xuanbo Tong (University of Jyväskylä)
15:50 Overview
15:50 - 16:20
Contributions

15:50 Connections of UPC to future experiment - Zhoudunming Tu (BNL) Zhoudunming Tu
16:20 Concluding session: Next UPC, farewell
Next UPC, farewell
16:20 - 17:00
Contributions

16:20 LHC alchemy - Joakim Nystrand (University of Bergen (NO))

16:35 Next UPC - Daniel Tapia Takaki (University of Kansas)

16:45 Farewell - Heikki Mäntysaari (University of Jyväskylä) Ilkka Helenius (Helsinki Institute of Physics (HIP)-Univ. of Helsinki, Fac. of S)
17:45 Dinner (bus to Ivalo airport 20:25)
Dinner (bus to Ivalo airport 20:25)
17:45 - 19:45

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