Radiative Corrections from medium to high energy experiments

18 Jul 2022, 09:00 → 22 Jul 2022, 19:00 Europe/Rome

Aula Leonardi (ECT*)

Andrei Afanasev (George Washington University, Washington/US), Ethan Cline (Stony Brook University, Stony Brook/US), Hubert Spiesberger (Institut für Physik / Institut für Kernphysik Johannes-Gutenberg-Universität), Jan Bernauer (Stony Brook University, Stony Brook/US), Ronald Gilman (Rutgers University)

Historically, radiative corrections were applied through correction factors to experimental data. Complicated modern experiments require implementing radiative processes in a full experimental simulation. The cross section for internal radiation depends strongly on the angles between photon and lepton lines, rising quickly over multiple orders when the photon is nearly collinear with a lepton. This presents challenges in the efficiency and numerical stability of MC simulations. Current, modern generators overcome this either via brute-force, averaging over small phase space elements to reduce the numerical instability, or by biasing the random number generation. A concerted effort by the community to author next-generation  generators,  addressing  existing  issues  and incorporating the best available theoretical calculations, is required.

The workshop will give the community a guideline of the precision available now, and conversely inform the theoretical and computational community on future requirements.

Day 1

Poster

Monday 18 July

Morning Session 1

1 Welcome and Registration

Speaker: Ethan Cline (Stony Brook University, Stony Brook/US)

Welcome.pdf

2 Why we are here and things that bother me

Speaker: Jan Bernauer (Stony Brook University, Stony Brook/US)

intro.pdf

3 Current status of the ULQ2 experiment and required corrections

Speaker: Clement Legris (ELPH, Tohoku University (Japan))

legris_trento.pdf

4 Proton Charge Radius from PRad Experiment at Jefferson Lab

Speaker: Ashot Gasparian (NC A and T State University, NC, USA)

Gasparian_Trento_2022.pdf

Lunch

Afternoon Session 1

5 High-precision QED initial state corrections for e^+e^−→γ^∗/Z^∗ annihilation

Speaker: Johannes Bluemlein (DESY)

trentoEPEM.pdf

6 The Two Photon Exchange Experiment

Speaker: Ethan Cline (Stony Brook University, Stony Brook/US)

ECCT_Rad_Corr.pdf

15:00 Coffee

7 Spin effects and two-photon exchange in electron scattering below the second resonance region: an effective theory approach

Speaker: Jose Goity (Hampton University and Jefferson Lab)

RadCor-Trento-TALK-GOITY.pptx

8 Discussion

Speaker: Ethan Cline (Stony Brook University, Stony Brook/US)

Tuesday 19 July

Morning Session 2

9 corrections for the chiral anomaly reaction pi gamma -> pi pi0

Speaker: Jan Friedrich (TU Munich)

2022-07-19-ChAnoRC-Friedrich.pdf

10 Electroweak box corrections for precision tests of the Standard Model

Speaker: Mikhail Gorshteyn (JGU Mainz)

ECT* RC workshop July 2022 red.pdf

10:30 Coffee

11 Radiative Corrections in Super-Rosenbluth Experiments

Speaker: Axel Schmidt (George Washington University)

schmidt_trento_2022.pdf

Lunch

Afternoon Session 2

12 radiative corrections to elastic muon proton scattering at low momentum transfers

Speaker: Norbert Kaiser (Technische Universitaet Muenchen)

radcorsem.pdf

13 Radiative corrections in Dalitz decays of $\pi^0$, $\eta^{(\prime)}$, $K^+$, and $\Sigma^0$

Speaker: Tomas Husek (Lund University)

Husek_ECT.pdf

14:45 Coffee

14 Elements of QED-NRQED Effective Field Theory: II. Matching of Contact Interactions

Speaker: Gil Paz

Paz_Proton_Radius_QED_NRQED.pdf

15 Discussion

Speaker: Ronald Gilman (Rutgers University)

Wednesday 20 July

Morning Session 3

16 Radiative corrections for the MUSE experiment

Speaker: Steffen Strauch (University of South Carolina)

RadCor2022_strauch.pdf

17 Two Photon Exchange at MUSE

Speaker: Ronald Gilman (Rutgers University)

TrentoTPEMUSE.pdf

10:30 Coffee

18 Two-photon exchange in Chiral perturbation Theory

Speaker: Fred Myhrer (University of South Carolina)

RadCorr-talkJuly2022.pdf

Lunch

Afternoon Session 3

19 Radiative corrections in interactions involving electrons and protons

Speaker: Egle Tomasi-Gustafsson (CEA Saclay)

ETG-RadCor.pdf

20 Study of radiative corrections for electron-proton scattering at A1 Collaboration

Speaker: Miha Mihovilovic (Jozef Stefan Institute, Faculty of Mathematics and Physics University of Ljubljana)

MihaTalkRadiativeCorrectionsECTStar2022Out.pdf

15:00 Coffee

21 Radiative Corrections in SIDIS

Speaker: Igor Akushevich (Duke University)

Akushevich_Jul_2022.pdf

22 Discussion

Speaker: Jan Bernauer (Stony Brook University, Stony Brook/US)

Thursday 21 July

Morning Session 4

23 The McMule framework for NNLO QED calculations

Speaker: Adrian Signer (PSI / UZH)

as-ect22.pdf

24 NNLO results with McMule

Speaker: Yannick Ulrich (University of Durham)

Library of results

mcmule-results-yu.pdf

10:30 Coffee

25 Two-photon exchange, single spin asymmetries, and proton form factors

Speaker: Peter Blunden (University of Manitoba)

Trento2022_Blunden.pdf

Lunch

Afternoon Session 4

26 Radiative corrections to charged-current neutrino scattering at GeV energies

Speaker: Oleksandr Tomalak (Los Alamos National Laboratory)

Tomalak_talk_Ecstar_2022.pdf

27 Dispersion corrections to elastic electron-nucleus scattering cross sections

Speaker: Doris Jakubassa-Amundsen (LMU Munich)

trento2022.pdf

15:00 Coffee

28 Radiative corrections for PVDIS, from 6 to 12 GeV (An experimentalist's view)

Speaker: Xiaochao Zheng (University of Virginia (UVa), Charlottesville/US)

PVDIS_RadCorr_ECTworkshop_20220721_withAn.pdf

29 Discussion

Speaker: Andrei Afanasev (George Washington University, Washington/US)

Friday 22 July

Morning Session 5

30 Measurement of structure dependent radiative K+ → e+νγ decays using stopped positive kaons

Speaker: Michael Kohl (Hampton University)

Talk_TREK-E36_MichaelKohl_RadCorr_Trento_July2022.pdf

31 Radiative effects in GENIE

Speaker: adi ashkenazi (MIT)

2207221_radiativeCorrection.pdf

10:30 Coffee

32 Close-Out

Speaker: Ethan Cline (Stony Brook University, Stony Brook/US)

Closeout.pdf

Lunch

Free Afternoon