Ratios of ¹⁵N/¹²C and ⁴HE/¹²C Inclusive Electroproduction Cross Sections in the Nucleon Resonance Region

CLAS Collaboration
M. Amarian, Old Dominion University
H. Bagdasaryan, Old Dominion University
M. Bektasoglu, Old Dominion University
S. Bültmann, Old Dominion University
S. L. Careccia, Old Dominion University
G. E. Dodge, Old Dominion University
G. Gavalian, Old Dominion University
N. Guler, Old Dominion University
C. E. Hyde-Wright, Old Dominion University
H. G. Juengst, Old Dominion University
N. Kalantarians, Old Dominion University
A. Klein, Old Dominion University
S. E. Kuhn, Old Dominion University
J. Lachniet, Old Dominion University
R. A. Niyazov, Old Dominion University
F. Sabatié, Old Dominion University
L. B. Weinstein, Old Dominion University

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Abstract

The (W,Q²) dependence of the ratio of inclusive electron scattering cross sections for ¹⁵N /¹²C was determined in the kinematic ranges 0.8 < W < 2 GeV and 0.2 < Q2 < 1 GeV² 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 Q². Ratios of ⁴He /¹²C 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,Q²) dependence of the ⁴He /¹²C 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.