We measured the high-momentum transfer [Q2 = 4.8 and 6.2 (GeV/c)2] quasi-elastic 12C(p,2p) reaction at θcm ≃ 90° for 6 and 7.5 GeV/c incident protons. The momentum components of both outgoing protons and the missing energy and momentum of the proton in the nucleus were measured. We verified the validity of the quasi-elastic picture for ground state momenta up to about 0.5 GeV/c. Transverse and longitudinal momentum distributions of the target proton were measured. They have the same shape with a large momentum tail which is not consistent with independent particle models. We observed that the transverse distribution gets wider as the longitudinal component increases in the beam direction.
|Original language||English (US)|
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Oct 8 1998|
Bibliographical noteFunding Information:
Very special thanks are due to Dr. M. Sargsyan, who accompanied our analysis with detailed calculations. We wish to thank Drs. L. Frankfurt, M. Strikman, G. Miller for their theoretical input and Drs. D. Day and J. Arrington for supplying us with the inclusive (e,e') data. S. Baker, F.J. Barbosa, S. Kaye, M. Kmit, D. Martel, D. Maxam, J.E. Passaneau, M. Zilca contributed significantly to the design and construction of the detector. We are pleased to acknowledge the assistance of the AGS staff in building the detector and supporting the experiment, particularily our liaison engineers, J. Mills, D. Dayton, C. Pearson. We acknowledge the continuing support of D. Lowenstein and P. Pile. This research was supported by the U.S – Israel Binational Science Foundation, the Israel Science Foundation founded by the Israel Academy of Sciences and Humanities, NSF grant PHY-9501114 and Department of Energy grants DEFG0290ER40553.