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The physics program in Hall A at Jefferson Lab commenced in the summer of 1997 with a detailed investigation of the 16O(e,ep) reaction in quasielastic, constant (q,) kinematics at Q20.8 (GeV/c)2, q1 GeV/c, and 445 MeV. Use of a selfcalibrating, selfnormalizing, thinfilm waterfall target enabled a systematically rigorous measurement. Fivefold differential crosssection data for the removal of protons from the 1pshell have been obtained for 0<pmiss<350 MeV/c. Sixfold differential crosssection data for 0<Emiss<120 MeV were obtained for 0<pmiss<340 MeV/c. These results have been used to extract the ALT asymmetry and the RL, RT, RLT, and RL+TT effective response functions over a large range of Emiss and pmiss. Detailed comparisons of the 1pshell data with Relativistic DistortedWave Impulse Approximation (RDWIA), Relativistic OpticalModel Eikonal Approximation (ROMEA), and Relativistic MultipleScattering Glauber Approximation (RMSGA) calculations indicate that twobody currents stemming from mesonexchange currents (MEC) and isobar currents (IC) are not needed to explain the data at this Q2. Further, dynamical relativistic effects are strongly indicated by the observed structure in ALT at pmiss300 MeV/c. For 25<Emiss<50 MeV and pmiss50 MeV/c, proton knockout from the 1s1/2state dominates, and ROMEA calculations do an excellent job of explaining the data. However, as pmiss increases, the singleparticle behavior of the reaction is increasingly hidden by more complicated processes, and for 280<pmiss<340 MeV/c, ROMEA calculations together with twobody currents stemming from MEC and IC account for the shape and transverse nature of the data, but only about half the magnitude of the measured cross section. For 50<Emiss<120 MeV and 145<pmiss<340 MeV/c, (e,epN) calculations which include the contributions of central and tensor correlations (twonucleon correlations) together with MEC and IC (twonucleon currents) account for only about half of the measured cross section. The kinematic consistency of the 1pshell normalization factors extracted from these data with respect to all available 16O(e,ep) data is also examined in detail. Finally, the Q2dependence of the normalization factors is discussed.
Originalspråk  engelska 

Artikelnummer  034606 
Tidskrift  Physical Review C: covering nuclear physics 
Volym  70 
Nummer  3 
DOI  
Status  Published  2004 
Ämnesklassifikation (UKÄ)
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Utforska forskningsämnen för ”Dynamics of the quasielastic O16(e,ep) reaction at Q^{2} = 0.8 (GeV/c)^{2}”. Tillsammans bildar de ett unikt fingeravtryck.Projekt
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