LumiDays 25

Session

Impact of beam dynamics on vdM calibrations

2

11 Mar 2025, 09:00

774/R-013 (CERN)

Conveners

Impact of beam dynamics on vdM calibrations: 2A

• Hannes Bartosik (CERN)

Impact of beam dynamics on vdM calibrations: 2B

• Witold Kozanecki (University of Oregon (US))

Impact of beam dynamics on vdM calibrations: 2C

• Tatiana Pieloni (EPFL)

7. Overview of the accelerator issues that impact the absolute luminosity calibrations at the LHC

Witold Kozanecki (University of Oregon (US))

11/03/2025, 09:00

8. Sources & mitigation of non-factorization in the injectors & the LHC

Foteini Asvesta (CERN)

11/03/2025, 09:40

• mechanisms of generating non-factorization in the proton-density
distributions, and its transport through the injector chain
• optimized beam preparation for vdM beams — how to optimize
factorization already before the vdM fill (e.g. scraping
measurements in LHC at injection to confirm factorization, further
optimization of beam production schemes in the injectors
• collimation in the LHC?

9. Results of the 2024 Non-factorization MD: accelerator measurements

Elleanor Lamb

11/03/2025, 10:10

10. LHCb non-factorization analyses

Vladislav Balagura (Centre National de la Recherche Scientifique (FR))

11/03/2025, 11:00

• 2-D vdM analysis
• LHCb BGI results from the NF MD

11. CMS non-factorization analyses

Peter Major (University of Maryland (US))

11/03/2025, 11:30

2-D vdM, beam-beam imaging and LRE analyses
• Including CMS results from the NF MD?

12. ATLAS non-factorization analyses

Tim Barklow (SLAC National Accelerator Laboratory (US))

11/03/2025, 12:00

2-D vdM and LRE analyses
• Including ATLAS results from the NF MD?
• Include some ALICE LRE results if so requested

30. Summary of beam-beam simulation studies during LS2

Witold Kozanecki (University of Oregon (US))

11/03/2025, 14:00

Summary of the beam-beam papers, with the emphasis on
(i) bb-related vdM uncertainties as currently understood, and
(ii) pending issues

31. Recent developments in beam-beam studies

Joanna Wanczyk

11/03/2025, 14:35

For instance:
• Results of the 2022 beam-beam MD
• New simulation results on Lu/L0 ambiguity
• Interplay between beam-beam & non-factorization biases

32. Generalization of parameterized beam-beam corrections to 2-D vdM scans

Ivan Kralik (Slovak Academy of Sciences (SK))

11/03/2025, 15:05