Name: LumiDays 25
Start: 2025-03-10T14:00:00+01:00
End: 2025-03-12T18:00:00+01:00
Location: CERN

LumiDays 25

from Monday, 10 March 2025 (14:00) to Wednesday, 12 March 2025 (18:00)

Monday, 10 March 2025
14:00 Luminosity determination in Run III, and associated uncertainties: 1A
1A
14:00 - 15:30
Room: 774/R-013
Contributions

14:00 Welcome – workshop program, goals and scope - David Stickland (Princeton University (US))

14:10 Overview of ATLAS luminosity determination - Brian Andrew Cole (Columbia University (US))

14:50 Overview of CMS luminosity determination - Gabriella Pasztor (Eötvös University, Budapest)
15:30 Tea/Coffee Break
Tea/Coffee Break
15:30 - 16:00
Room: 774/R-013
16:00 Luminosity determination in Run III, and associated uncertainties: 1B
1B
16:00 - 17:30
Room: 774/R-013
Contributions

16:00 HI-specific vdM-calibration issues (ALICE Speaker) - Martino Gagliardi (Universita e INFN Torino (IT))

16:35 ALICE final Run-II luminosity measurements - Jesus Guillermo Contreras Nuno (Czech Technical University in Prague (CZ))

17:00 LHCb methods & techniques for luminosity measurements in pp collisions - Daniele Passaro (SNS & INFN Pisa (IT))
Tuesday, 11 March 2025
09:00 Impact of beam dynamics on vdM calibrations: 2A
2A
09:00 - 10:30
Room: 774/R-013
Contributions

09:00 Overview of the accelerator issues that impact the absolute luminosity calibrations at the LHC - Witold Kozanecki (University of Oregon (US))

09:40 Sources & mitigation of non-factorization in the injectors & the LHC - Foteini Asvesta (CERN)

10:10 Results of the 2024 Non-factorization MD: accelerator measurements - Elleanor Lamb
10:30 Coffee/Tea Break
Coffee/Tea Break
10:30 - 11:00
Room: 774/R-013
11:00 Impact of beam dynamics on vdM calibrations: 2B
2B
11:00 - 12:30
Room: 774/R-013
Contributions

11:00 LHCb non-factorization analyses - Vladislav Balagura (Centre National de la Recherche Scientifique (FR))

11:30 CMS non-factorization analyses - Peter Major (University of Maryland (US))

12:00 ATLAS non-factorization analyses - Tim Barklow (SLAC National Accelerator Laboratory (US))
12:30 Lunch
Lunch
12:30 - 14:00
Room: 774/R-013
14:00 Impact of beam dynamics on vdM calibrations: 2C
2C
14:00 - 15:30
Room: 774/R-013
Contributions

14:00 Summary of beam-beam simulation studies during LS2 - Witold Kozanecki (University of Oregon (US))

14:35 Recent developments in beam-beam studies - Joanna Wanczyk

15:05 Generalization of parameterized beam-beam corrections to 2-D vdM scans - Ivan Kralik (Slovak Academy of Sciences (SK))
15:30 Tea/Coffee Break
Tea/Coffee Break
15:30 - 16:00
Room: 774/R-013
16:00 Impact of accelerator instrumental issues on luminosity calibrations: 3A
3A
16:00 - 18:20
Room: 774/R-013
Contributions

16:00 Tune measurements in vdM fills, before and during collisions - Tom Levens (CERN)

16:20 LHC bunch-population measurements in Run III & beyond: a status report - Alexander Nicholas Jury (University of Liverpool (GB))

16:50 LHCb ghost-charge measurements - Niall Thomas Mchugh (University of Glasgow (GB))

17:10 Numerical Tools for Studying Beam Dynamics Effects on Luminosity Calibration: COMBI and XSUITE - Tatiana Pieloni (EPFL)

17:30 Follow-up questions and discussion - Witold Kozanecki (University of Oregon (US))
Wednesday, 12 March 2025
09:00 Impact of accelerator instrumental issues on luminosity calibrations: 3B
3B
09:00 - 10:30
Room: 774/R-013
Contributions

09:00 Impact of magnetic non-linearities, BPM performance & x-y coupling on ATLAS length-scale calibrations - Richard Hawkings (CERN)

09:35 Status report on LHC beam-position measurements at the experimental IPs - Marek Gasior (CERN)

10:00 BPM- and BGI-based beam-displacement measurements at IP8 - Vladislav Balagura (Centre National de la Recherche Scientifique (FR))
10:30 Coffee/Tea Break
Coffee/Tea Break
10:30 - 11:00
Room: 774/R-013
11:00 Impact of accelerator instrumental issues on luminosity calibrations: 3C
3C
11:00 - 11:30
Room: 774/R-013
Contributions

11:00 Emittance evolution in physics and luminosity-calibration fills: what measurements do we have and what did we learn from them? - Sofia Kostoglou (CERN)
11:30 Luminometer non-linearities and integration uncertainties: 4A
4A
11:30 - 12:30
Room: 774/R-013
Contributions

11:30 Uses of Emittance Scans and Planning for 25-26 - David Stickland (Princeton University (US))

11:50 Long term stability, non-linearity corrections, integration methodologies and systematic uncertainties in CMS - Francesco Romeo (Vanderbilt University)
12:30 Lunch
Lunch
12:30 - 14:00
Room: 774/R-013
14:00 Luminometer non-linearities and integration uncertainties: 4B
4B
14:00 - 14:30
Room: 774/R-013
Contributions

14:00 Calibration-transfer and long-term stability in ATLAS: corrections & systematic uncertainties. - Giulia Ripellino (Uppsala University (SE))
14:30 What can we do better in the remainder of Run III, and looking to Run 4: 5A
5A
14:30 - 15:30
Room: 774/R-013
Contributions

14:30 Use of reference physics processes for long-term relative-stability monitoring - David Walter (Massachusetts Inst. of Technology (US))

15:05 New LHCb luminometers in Run III - Edoardo Franzoso (Universita e INFN, Ferrara (IT))
15:35 Tea/Coffee Break
Tea/Coffee Break
15:35 - 16:00
Room: 774/R-013
16:00 What can we do better in the remainder of Run III, and looking to Run 4: 5B
5B
16:00 - 17:30
Room: 774/R-013
Contributions

16:00 Looking to Run 4: ATLAS Run-3 experience with LUCID prototypes for HL- LHC - Vincent Hedberg (Lund University (SE))

16:30 Looking to Run 4 in CMS - Alexey Shevelev (University of Maryland (US))

17:00 Discussion and Closeout