JLAB E03103 Results

Note that the results shown here have been superseded by those in PRC 104 (2021) 6, 065203C

See https://doi.org/10.1103/PhysRevC.104.065203 or https://arxiv.org/abs/2110.08399

Figures and data tables from

J.Seely, A. Daniel et al, "New Measurements of the EMC Effect in Very Light Nuclei"

(PRL 103 (2009) 202301 or nucl-ex/0904.4448)

Figure 1. Carbon EMC ratios for the five highest Q² settings (Q² quoted at x=0.75).
Uncertainties are the combination of statistical and point to point systematic.
The solid curve is the SLAC fit to the Carbon EMC ratio.

1. Figure in eps format.
2. Data files:
    a) Q²=4.1 GeV² ; carbon_q2_4.1_ratio.dat
    b) Q²=4.5 GeV²; carbon_q2_4.5_ratio.dat
    c) Q²=4.8 GeV²; carbon_q2_4.8_ratio.dat
    d) Q²=5.3 GeV²; carbon_q2_5.3_ratio.dat
    e) Q²=6.1 GeV²; carbon_q2_6.1_ratio.dat

Carbon, beryllium, and helium-4 EMC ratios

Figure 2. EMC ratios for ¹²C, ⁹Be, and ⁴He, compare to SLAC. The ⁹Be results include a correction for the neutron excess.
Closed (open) circles denote W² above (below) 2 GeV². The solid curve is the A-dependent fit to the SLAC data, while the
dashed curve is the fit to ¹²C. Normalization uncertainties are shown in parentheses for both measurements.

1. Figure 2 in eps format.
2. Data files:
    a) Carbon ratio: carbon_q2_5.3_ratio.dat
    b) Beryllium ratio: be_q2_5.3_ratio.dat
    c) Helium-4 ratio: he4_q2_5.3_ratio.dat

Figure 3. EMC ratio for ³He. The upper squares are the raw ³He/²H ratios, while the bottom
circles show the isoscalar EMC ratio. The triangles are the HERMES results, which use a different
isoscalar correction. The solid (dashed) curves are the SLAC A-dependent fits to Carbon and ³He.

1. Figure 3 in eps format.
2. Data file: he3_q2_5.3_ratio.dat

Figure 4. The circles show the slopes of the isoscalar EMC ratio for 0.35 function of nuclear density. Error bars include statistical and systematic uncertainties.

1. Figure 4 in ps format.