Backward-Angle (u-channel) Physics Workshop

Sep 21, 2020, 8:00 AM → Sep 23, 2020, 6:00 PM US/Eastern

Online

Garth Huber (University of Regina), Justin Stevens (College of William and Mary), Wenliang Li (William & Mary)

We are pleased to announce that the First Backward-Angle (u-channel) Physics Workshop will be held September 21-23. Due to the recent global event, the workshop participation is virtual only.

The objectives of the workshop are as follows:

• Offer a platform to connect scattered experiment and theory efforts together, thus, potentially forming small backward-angle physics working groups.
• Generate discussions on the implications the backward-angle physics and probe the physics case for a systematic backward-angle physics research program.
• Inspire future backward-angle physics data mining or dedicated studies, including the JLab 12 GeV program, and PANDA/FAIR.
• Discuss the feasibility of including backward-angle physics in the EIC scientific program.

The scientific program is expected to comprise roughly 20 talks. These are scheduled in the morning hours of the EST timezone for the three-day workshop. Separate group discussions on the u-channel electroproduction and photoproduction are scheduled after the presentation sessions on Tuesday and Wednesday.

When Connecting to the meeting, participants must login into the their Zoon account (google login will work).

Workshop registration: https://www.jlab.org/conference/BACKANGLE

Workshop connection link: https://cwm.zoom.us/j/96395613180

Passcode: 657066

Monday, September 21

9:00 AM → 9:15 AM Welcome and Introduction

Speaker: Dr Wenliang Li (William & Mary)

Slides Workshop_Introduction.pdf

9:15 AM → 1:05 PM Morning Session 1: u-channel Electroproduction Processes

Convener: Dr Wenliang Li (William & Mary)

9:15 AM Meson-Nucleon Transition Distribution Amplitude

Speaker: Dr Kirill Semenov-Tian-Shansky (Petersburg Nuclear Physics Institute)

Slides Talk_JLab_September_2020_KS_final.pdf

9:45 AM Large Angle Beam-Spin-Asymmetry of pions at CLAS

Speaker: Dr Stefan Diehl (Justus Liebig University Giessen and University of Connecticut)

Slides Diehl_large_angle_workshop_CLAS.pdf

10:05 AM Hard Exclusive Single Charged Pion Electroproduction Off the Proton

Speaker: Dr Kijun Park (HUPTI)

Slides KPark09212020.pdf

10:25 AM Coffee Break

10:45 AM GPDs at large Skewness

Speaker: Prof. Mark Strikman (Penn State University)

Slides Mark_backward.pdf

11:15 AM Exploring the soft-hard transition in forward and backward meson production

Speaker: Christian Weiss (Jefferson Lab)

Slides weiss20_backward20.pdf

11:45 AM Coffee Break

12:05 PM Radiative Correction at Backward Angles

Speaker: Andrei Afanasev (GWU)

12:35 PM Backward Exclusive ω Electroproduction from JLab 6 GeV Hall C

Speaker: Prof. Garth Huber (University of Regina)

Slides omega_backangle20.pdf

Tuesday, September 22

9:00 AM → 12:10 PM Morning Session 1: Future u-channel Opportunities 12 GeV, PANDA and EIC

Convener: Justin Stevens (College of William and Mary)

9:00 AM Studying TDA with pp → e+e−π0 at the PANDA Experiment

Speaker: Dr Stefan Diehl (Justus Liebig University Giessen and University of Connecticut)

Slides Diehl_large_angle_workshop_PANDA.pdf

9:25 AM Backward Meson Electroproduction Opportunities at EIC

Speaker: Dr Wenliang Li (William & Mary)

Slides 2020_Sep_backward_angle_workshop_final.pdf

9:50 AM Backward Opportunities at JLab 12 GeV Hall A with BigBite and Super BigBite Spectrometers

Speaker: Dr Carlos Ayerbe Gayoso (The College of William and Mary)

Slides C.Ayerbe-OportunitiesAtSBS_20200922.pdf

10:10 AM Short Range Correlation and Backward Nucleon Tagging

Speaker: Florian Hauenstein (Old Dominion University)

Slides Hauenstein_workshop.pdf

10:30 AM Coffee break

10:50 AM Backward Meson Electroproduction from JLab 12 GeV Hall C Kaon LT Experiment

Speaker: Dr Stephen Kay (University of Regina)

Slides uChannel_2020_SK.pdf

11:15 AM Non-forward pi+pi- Production

Speaker: Dr Robert Perry (The University of Adelaide)

Slides backward_angle.pdf

11:45 AM Backward production at high energies, in ultra-peripheral collisions and at an EIC

Speaker: Dr Spencer Klein (Lawrence Berkeley National Laboratory)

Slides KleinbackwardproductioninUPCsandtheEIC.pdf

12:10 PM → 12:30 PM Coffee Break

12:30 PM → 1:30 PM Session Discussion on u-channel Electroproduction

Speaker: Christian Weiss (Jefferson Lab)

Slides backward20_discussion.pdf

Wednesday, September 23

9:00 AM → 11:50 AM u-channel Photoproduction Processes

Convener: Prof. Garth Huber (University of Regina)

9:00 AM ω Photoproduction off Proton Target at Backward Angles

Speaker: Dr Byung-Geel Yu (Korea Aerospace University)

Slides bgyu-omega-jlab.pptx

9:35 AM u-channel Photoproduction and Backward Angle TCS

Speaker: Dr Bernard Pire (CPhT-Polytechnique)

Slides BP-bTCS_2020.pdf

10:00 AM Wide Compton Scattering at Hall C

Speakers: Dr Bogdan Wojtsekhowski (Jefferson Lab), Prof. David Hamilton (Glasgow University, Glasgow Scotland)

Slides WACS_UChannelWorkshop_DJH.pdf

10:25 AM Coffee Break

10:45 AM Backward-angle meson photoproduction with the GlueX experiment

Speaker: Justin Stevens (College of William and Mary)

Slides stevens_uchannel.pdf

11:10 AM Backward Baryon-Antibaryon Photoproduction at GlueX Experiment

Speaker: Mr Hao Li (Carnegie Mellon University)

Slides Backward_angle_workshop_Sep_2020_Hao_Li(Draft).pdf

11:30 AM K^+ Sigma^0 Photoproduction at Backward Angle at GlueX Experiment

Speaker: Nilanga Wickramaarachch (Old Dominion University)

Slides KSigma_u_channel_slides.pdf

11:50 AM → 12:10 PM Coffee break

12:10 PM → 1:10 PM Session discussion on u-channel Photoproduction

Speaker: Christian Weiss (Jefferson Lab)

Slides backward20_discussion_2.pdf