PDF4LHC with PHYSTAT

6 Oct 2025, 08:45 → 7 Oct 2025, 18:40 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

Amanda Sarkar (University of Oxford (GB))

This meeting of the PDF4LHC will include a session jointly with the PHYSTAT forum in addition to the usual contributions from the experiments and PDF providers. Agenda is currently provisional

Monday 6 October

08:45 → 14:00 PHYSTAT session: PHYSTAT for PDFs

PDF4LHC joint with PHYSTAT empasis on uncertainties on PDFs

08:45 Welcome

Speakers: Lydia Brenner (Nikhef National institute for subatomic physics (NL)), Olaf Behnke (Deutsches Elektronen-Synchrotron (DE)), Olaf Behnke (DESY)

PHYSTAT-PDF4LHC-251006_opening.pdf

09:00 PDF fitting overview

Speaker: Dr Lucian Alexander Harland-Lang (University College London)

lhl_PDF4LHC_summary_comp.pdf

09:45 Session 1: Uncertainty quantification in practice, a dialogue between Pavel Nadolsky and Josh Bendavid: perspectives on the PDF tolerance from the vantage points of PDF fitters and experimentalists working on EW precision measurements.

Speakers: Josh Bendavid (CERN), Prof. Pavel Nadolsky (Michigan State University)

nadolsky_phystat.pdf

pdf4lhcPhystatExp-Oct6-2025.pdf

10:30 Session 1: Uncertainty quantification in practice, response from statisticians and audience

Speaker: Lydia Brenner (Nikhef National institute for subatomic physics (NL))

11:00 Coffee

11:30 Session 2: Detecting an treating inconsistent data, a dialogue between Mark Constantini and Sofia Olhede

Speakers: Mark Costantini, sofia olhede

cern_talk_inconsistencies_costantini.pdf

main-olhede.pdf

12:10 Session 2: Detecting an treating inconsistent data, response from audience

Speaker: Robert Samuel Thorne (University College London (UK))

12:40 Lunch

14:00 → 18:00 PDF4LHC meeting: PHYSTAT for PDFs

vandyk.pdf

14:00 Session 3: PDF parametrisation and model uncertainty, a dialogue between Aurore Courtoy and Chad Schafer

Speakers: Aurore Courtoy, Aurore Courtoy (Instituto de Física, UNAM), Chad Schafer

PDF4LHC_phystat_25_AC.pdf

PDF_Slides_Schafer.pdf

14:40 Session 3: PDF parametrisation and model uncertainty, response from audience

Speaker: Amanda Sarkar (University of Oxford (GB))

15:10 Highlight talk: A Theory of almost Everything--- Statistically Speaking

Speaker: Prof. Xiao-Li Meng (Harvard University)

CERNddp.pdf

15:55 Tea/Coffee

16:25 Session 4: Fit complexity and nuisance parameters, a dialogue between Bogdan Malaescu and David van Dyk

Speakers: Bogdan Malaescu (LPNHE-Paris CNRS/IN2P3 (FR)), David van Dyk

NPs_Uncertainties_Correlations__Malaescu.pdf

vandyk.pdf

17:05 Session 4: Fit complexity and nuisance parameters, response from audience

Speaker: Olaf Behnke (Deutsches Elektronen-Synchrotron (DE))

17:35 Wrap-up

Speakers: Prof. Pavel Nadolsky (Michigan State University), Robert Samuel Thorne (University College London (UK))

Tuesday 7 October

09:00 → 09:20 News from ATLAS

Speaker: Eimear Isobel Conroy (University of Oxford (GB))

PDF4LHC25_Talk.pdf

09:20 → 09:40 News from LHCb

Speaker: Jiuzhao Li (Central China Normal University CCNU (CN))

News_LHCb.pdf

09:40 → 10:00 News from CMS

Speaker: Daniel Savoiu (Hamburg University (DE))

2025-10-07_dsavoiu_pdf4lhc_news_cms.pdf

10:05 → 10:25 ABMP update

Speaker: Maria Vittoria Garzelli (DESY)

sempdf25.pdf

10:25 → 10:45 A linear PDF model for Bayesian Inference

Speaker: Mark Costantini

cern_talk_linear_model_costantini.pdf

10:45 → 11:15 Coffee

11:15 → 11:35 MSHT update

Speaker: Dr Lucian Alexander Harland-Lang (University College London)

lhl_PDF4LHC_mshtcomp.pdf

11:35 → 11:55 CT update

Speaker: Joey Huston (Michigan State University (US))

CT_update_PDF4LHC_oct7_25.pdf

11:55 → 12:15 NNPDF update

Speaker: Tommaso Giani

pdf4lhc25_nnpdf_giani.pdf

12:20 → 12:40 Colibri: a general open source tool for Bayesian PDF fits (and more)

Speaker: Valentina Schutze

Colibri for pdf4lhc.pdf

12:40 → 13:00 PDF Uncertainties: the Markov Chain Monte-Carlo approach

Speaker: Peter Risse (Southern Methodist University)

Risse_PDF4LHC_2025.pdf

13:00 → 14:00 Lunch

14:00 → 14:20 Precision measurements of the EW mixing angle

Speaker: Hyon San Seo (University of Rochester (US))

251007PDF4LHC.pdf

14:20 → 14:40 N3LO studies in xFitter

Speaker: Dr Francesco Giuli (INFN e Universita Roma Tor Vergata (IT))

FGiuli_PDF4LHC.pdf

14:45 → 15:05 Hoppet v2: Fast and accurate parton evolution in the LHC precision era

Speaker: Dr Alexander Karlberg (CERN)

07102025PDF4LHC.pdf

15:05 → 15:25 Two mass 3-loop corrections to DIS: structure functions and VFNS

Speaker: Kay Schönwald

KS-PDF4LHC-2025.pdf

15:25 → 15:45 MSHT uncertainties

Speaker: Robert Samuel Thorne (University College London (UK))

PDF4LHC25.pdf

15:45 → 16:15 Tea/Coffee

16:15 → 16:35 CT uncertainties

Speaker: Kirtimaan Ajaykant Mohan

k_mohan_uq_pdf4lhc_Oct_2025.pdf

16:35 → 16:55 Higher Twists

Speaker: Richard Ball

PDF4LHC25 RDB.pdf

17:00 → 17:20 QED-enhanced PDF implications for the Higgs sector

Speaker: Max Ponce Chavez

MaxPDF4LHC.pdf

17:20 → 17:40 JAM update

Speaker: Trey Anderson (William and Mary)

Anderson_PDF4LHC25.pdf

17:40 → 18:00 nCTEQ25

Speaker: Michael Klasen

klasen.pdf