B. Zhao 1 , R. De Masi 2 , K. Joo 1 , V. Kubarovsky 3 , P. Stoler 3 , M. Ungaro 1 and the CLAS Collaboration 1. University of Connecticut, USA, 2. Saclay-CEA, France 3. RPI, USA Beam Spin Asymmetry Measurements from Deeply Virtual Meson Production Introduction Experiment Preliminary Results DVMP with CLAS12 Summary
24
Embed
B. Zhao 1 , R. De Masi 2 , K. Joo 1 , V. Kubarovsky 3 , P. Stoler 3 , M. Ungaro 1
Beam Spin Asymmetry Measurements from Deeply Virtual Meson Production. B. Zhao 1 , R. De Masi 2 , K. Joo 1 , V. Kubarovsky 3 , P. Stoler 3 , M. Ungaro 1 and the CLAS Collaboration 1. University of Connecticut, USA, 2. Saclay-CEA, France 3. RPI, USA. Introduction Experiment - PowerPoint PPT Presentation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
B. Zhao1, R. De Masi2, K. Joo1, V. Kubarovsky3, P. Stoler3, M. Ungaro1
and the CLAS Collaboration
1. University of Connecticut, USA, 2. Saclay-CEA, France 3. RPI, USA
Beam Spin Asymmetry Measurements from Deeply Virtual Meson Production
Introduction
Experiment
Preliminary Results
DVMP with CLAS12
Summary
Proton form factors, transverse charge & current densities
D. Mueller, X. Ji, A. Radyushkin, A. Belitsky, …M. Burkardt, … Interpretation in impact parameter space
• Integrated for all Q2 and x• Fit to asin/(1+bcos + ccos2)
Data Analysis by B. Zhao
Preliminary
ALU
Beamline Instrumentation
Preshower Calorimeter
Forward Drift Chambers
Inner Cerenkov(HTCC)
SuperconductingTorus Magnet
Central Detector
Forward Calorimeter
Forward Time-of-Flight
Detectors
* Reused detectors from CLAS
Forward Cerenkov(LTCC)
Inner Calorimeter
CLAS12
K. Joo, M.UngaroUniversity of Connecticut, USA
V. Kubarovsky, P.StolerDepartment of Physics, Rensselaer,
USA
1. High Q2, Low t
2. High Q2, High t
DVMP of and with CLAS12
PR12-06-108
Acceptance of Q2 vs xB with CLAS12
• Increase in luminosity by a factor ~5• Larger acceptance
Acceptance for 0 events using FASTMC for CLAS12
Summary
1. An extensive program is underway to study GPDs by measuring exclusive channels.
2. Measured large ALU in ep ->ep, ep->ep
3. The second half of the run (e1-dvcs) is scheduled in 2008.
4. The new experiment (E05-114) using polarized proton target is also scheduled in 2008.
5. Deeply virtual meson production (DVMP) measurements with CLAS12 as well as DVCS is approved and will be one of flagship experiments with the JLAB 12 GeV upgraded program.