Single-particle strength restoration and nuclear transparency in high- Q2 exclusive (e,e′p) reactions

Abstract

Quasifree (e,e′p) reactions at Q 2∼0.1 GeV 2 observed a strong quenching of the single-particle valence strength. This precluded unambiguous measurement of nuclear transparency in quasifree (e,e′p) reactions at Q 2⩾1 GeV 2 . We argue that the high-energy nuclear transparency in the transverse kinematics weakly depends on the probability of the short-range correlations and can be accurately determined using information on the cross section of the (e,e′) reaction at x∼1 and Q 2∼1–2 GeV 2. We find that the Glauber approximation well describes E91-013 and NE18 (e,e′p) data at 2⩽ Q 2⩽4 GeV 2 without any significant quenching. This gives further support to our observation that the quenching of nuclear levels strongly depends on the resolution ( Q 2) and practically disappears at Q 2⩾1 GeV 2 .