The (W, Q(2)) dependence of the ratio of inclusive electron scattering cross sections for (15)N/(12)C was determined in the kinematic ranges 0.8 < W < 2 GeV and 0.2 < Q(2)< 1 GeV(2) using 2.285 GeV electrons and the CLAS detector at Jefferson Lab. The ratios exhibit only slight resonance structure, in agreement with a simple phenomenological model and an extrapolation of deep-inelastic scattering ratios to low Q(2). Ratios of (4)He/(12)C using 1.6 to 2.5 GeV electrons were measured with very high statistical precision and were used to correct for He in the N and C targets. The (W, Q(2)) dependence of the (4)He/(12)C ratios is in good agreement with that of the phenomenological model and exhibit significant resonance structure centered at W = 0.94,1.23, and 1.5 GeV.
Ratios of (15)N/(12)C and (4)He/(12)C inclusive electroproduction cross sections in the nucleon resonance region
CORVISIERO, PIETRO;RICCO, GIOVANNI;TAIUTI, MAURO GINO;
2008-01-01
Abstract
The (W, Q(2)) dependence of the ratio of inclusive electron scattering cross sections for (15)N/(12)C was determined in the kinematic ranges 0.8 < W < 2 GeV and 0.2 < Q(2)< 1 GeV(2) using 2.285 GeV electrons and the CLAS detector at Jefferson Lab. The ratios exhibit only slight resonance structure, in agreement with a simple phenomenological model and an extrapolation of deep-inelastic scattering ratios to low Q(2). Ratios of (4)He/(12)C using 1.6 to 2.5 GeV electrons were measured with very high statistical precision and were used to correct for He in the N and C targets. The (W, Q(2)) dependence of the (4)He/(12)C ratios is in good agreement with that of the phenomenological model and exhibit significant resonance structure centered at W = 0.94,1.23, and 1.5 GeV.
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