testing the limits of the single particle model in 16 o(e,ep) - update to e00-102 thomas jefferson...
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Testing the Limits of the Single Particle Model in 16O(e,e’p)
- Update to E00-102
THOMAS JEFFERSON NATIONAL ACCELERATOR LABORATORY
Arun Saha Jefferson Lab, Newport News,
VA*
Hall A Collaboration MeetingJune 23, 2005
A. Saha, Hall A Collaboration Mtg., June 23, 2005
E00-102* Ran Oct. 25 – Dec. 9, 2001
• Determine the limits of validity of the single-particle model of valence proton knock-out
• Determine effects of relativity and spinor distortion on valence proton knock-out using the diffractive character of the ALT asymmetry
• Determine bound-state wave function and spectroscopic factors for valence proton knock-out
THOMAS JEFFERSON NATIONAL ACCELERATOR LABORATORY
* Update to E89-003 – Hall A 1997 (E00-102 higher precision, higher pmiss and Emiss)
A. Saha, Hall A Collaboration Mtg., June 23, 2005
*
* E89-003 pmiss up to 0.345 GeV/c
cp
E
cq
cQ
E
miss
miss
o
GeV/0.755to515.0
GeV240.0to0
GeV499.0
GeV/066.1
)GeV/(902.0
GeV620.422
Minus kinematics
Plus kinematics
Data were obtained for the 1p-shell,1s1/2-state, and the continuum
THOMAS JEFFERSON NATIONAL ACCELERATOR LABORATORY
A. Saha, Hall A Collaboration Mtg., June 23, 2005
People Involved
• Spokespersons: L. Weinstein (ODU), K. Fissum (Lund), A. Saha (JLab),W. Bertozzi (MIT)
• Students: M. Andersson (Lund)K. Foe (ODU)
• Post Docs: B. Reitz (JLab),W. Hinton (Hampton)R. Roche (ODU)J. Lachniet (ODU)
THOMAS JEFFERSON NATIONAL ACCELERATOR LABORATORY
A. Saha, Hall A Collaboration Mtg., June 23, 2005
o Anticipated data points from E00-102
Data obtained from E89-003
Compared to calculations by Udias et al.
Projected ALT for Proton Knockout from 1p1/2 and 1p3/2-states of 16O
THOMAS JEFFERSON NATIONAL ACCELERATOR LABORATORY
A. Saha, Hall A Collaboration Mtg., June 23, 2005
Overview of Analysis- M. Andersson
Relative Cross section data
0 < pmiss < 350 Mev/c
corresponds to kin A+, C+, D+, E+ and F+.
• The pmiss bins are 2 MeV/c for kin A+ through D+ and 4 MeV/c for the other two.
• Statistical Uncertainty is 7% for the overlap between proton spectrometer angular settings achieved.
• Cuts Applied: ± 50 mr in Θ and Φ, ± 3.5 % in dp.
THOMAS JEFFERSON NATIONAL ACCELERATOR LABORATORY
A. Saha, Hall A Collaboration Mtg., June 23, 2005
Kin A+ pmiss = +70 MeV/c
THOMAS JEFFERSON NATIONAL ACCELERATOR LABORATORY
A. Saha, Hall A Collaboration Mtg., June 23, 2005
Kin C+ pmiss = +140 MeV/c
THOMAS JEFFERSON NATIONAL ACCELERATOR LABORATORY
A. Saha, Hall A Collaboration Mtg., June 23, 2005
Kin D+ pmiss = +175 MeV/c
THOMAS JEFFERSON NATIONAL ACCELERATOR LABORATORY
A. Saha, Hall A Collaboration Mtg., June 23, 2005
Kin E+ pmiss = +210 MeV/c
THOMAS JEFFERSON NATIONAL ACCELERATOR LABORATORY
A. Saha, Hall A Collaboration Mtg., June 23, 2005
Kin F+ pmiss = +280 MeV/c
THOMAS JEFFERSON NATIONAL ACCELERATOR LABORATORY
A. Saha, Hall A Collaboration Mtg., June 23, 2005
Effective momentum distribution
THOMAS JEFFERSON NATIONAL ACCELERATOR LABORATORY
A. Saha, Hall A Collaboration Mtg., June 23, 2005
Future Analyses Tasks
• W. Boeglin (FSU) has joined the team
- interested in the continuum part.
• Simulation work in Europe (Udias, Fissum)• Data analyses work in the US
THOMAS JEFFERSON NATIONAL ACCELERATOR LABORATORY
A. Saha, Hall A Collaboration Mtg., June 23, 2005