Showing 3 of 3 results
High-statistics differential cross sections for the reactions gamma p -> p eta and gamma p -> p eta-prime have been measured using the CLAS at Jefferson Lab for center-of-mass energies from near threshold up to 2.84 GeV. The eta-prime results are the most precise to date and provide the largest energy and angular coverage. The eta measurements extend the energy range of the world's large-angle results by approximately 300 MeV. These new data, in particular the eta-prime measurements, are likely to help constrain the analyses being performed to search for new baryon resonance states.
Differential cross section for the W range 1.68 to 1.69 GeV.
Differential cross section for the W range 1.69 to 1.70 GeV.
Differential cross section for the W range 1.70 to 1.71 GeV.
Differential cross section for the W range 1.71 to 1.72 GeV.
Differential cross section for the W range 1.72 to 1.73 GeV.
Differential cross section for the W range 1.73 to 1.74 GeV.
Differential cross section for the W range 1.74 to 1.75 GeV.
Differential cross section for the W range 1.75 to 1.76 GeV.
Differential cross section for the W range 1.76 to 1.77 GeV.
Differential cross section for the W range 1.77 to 1.78 GeV.
Differential cross section for the W range 1.78 to 1.79 GeV.
Differential cross section for the W range 1.79 to 1.80 GeV.
Differential cross section for the W range 1.80 to 1.81 GeV.
Differential cross section for the W range 1.81 to 1.82 GeV.
Differential cross section for the W range 1.82 to 1.83 GeV.
Differential cross section for the W range 1.83 to 1.84 GeV.
Differential cross section for the W range 1.84 to 1.85 GeV.
Differential cross section for the W range 1.85 to 1.86 GeV.
Differential cross section for the W range 1.86 to 1.87 GeV.
Differential cross section for the W range 1.87 to 1.88 GeV.
Differential cross section for the W range 1.88 to 1.89 GeV.
Differential cross section for the W range 1.89 to 1.90 GeV.
Differential cross section for the W range 1.90 to 1.91 GeV.
Differential cross section for the W range 1.91 to 1.92 GeV.
Differential cross section for the W range 1.92 to 1.93 GeV.
Differential cross section for the W range 1.93 to 1.94 GeV.
Differential cross section for the W range 1.94 to 1.95 GeV.
Differential cross section for the W range 1.96 to 1.97 GeV.
Differential cross section for the W range 1.97 to 1.98 GeV.
Differential cross section for the W range 1.98 to 1.99 GeV.
Differential cross section for the W range 1.99 to 2.00 GeV.
Differential cross section for the W range 2.00 to 2.01 GeV.
Differential cross section for the W range 2.01 to 2.02 GeV.
Differential cross section for the W range 2.02 to 2.03 GeV.
Differential cross section for the W range 2.03 to 2.04 GeV.
Differential cross section for the W range 2.04 to 2.05 GeV.
Differential cross section for the W range 2.05 to 2.06 GeV.
Differential cross section for the W range 2.06 to 2.07 GeV.
Differential cross section for the W range 2.07 to 2.08 GeV.
Differential cross section for the W range 2.08 to 2.09 GeV.
Differential cross section for the W range 2.09 to 2.10 GeV.
Differential cross section for the W range 2.10 to 2.12 GeV.
Differential cross section for the W range 2.12 to 2.14 GeV.
Differential cross section for the W range 2.14 to 2.16 GeV.
Differential cross section for the W range 2.16 to 2.18 GeV.
Differential cross section for the W range 2.18 to 2.20 GeV.
Differential cross section for the W range 2.20 to 2.22 GeV.
Differential cross section for the W range 2.22 to 2.24 GeV.
Differential cross section for the W range 2.24 to 2.26 GeV.
Differential cross section for the W range 2.26 to 2.28 GeV.
Differential cross section for the W range 2.28 to 2.30 GeV.
Differential cross section for the W range 2.30 to 2.32 GeV.
Differential cross section for the W range 2.32 to 2.34 GeV.
Differential cross section for the W range 2.34 to 2.36 GeV.
Differential cross section for the W range 2.36 to 2.40 GeV.
Differential cross section for the W range 2.40 to 2.44 GeV.
Differential cross section for the W range 2.44 to 2.48 GeV.
Differential cross section for the W range 2.48 to 2.52 GeV.
Differential cross section for the W range 2.52 to 2.56 GeV.
Differential cross section for the W range 2.56 to 2.60 GeV.
Differential cross section for the W range 2.60 to 2.64 GeV.
Differential cross section for the W range 2.64 to 2.68 GeV.
Differential cross section for the W range 2.68 to 2.73 GeV.
Differential cross section for the W range 2.75 to 2.84 GeV.
Differential cross section for the W range 1.92 to 1.93 GeV.
Differential cross section for the W range 1.93 to 1.94 GeV.
Differential cross section for the W range 1.94 to 1.95 GeV.
Differential cross section for the W range 1.96 to 1.97 GeV.
Differential cross section for the W range 1.97 to 1.98 GeV.
Differential cross section for the W range 1.98 to 1.99 GeV.
Differential cross section for the W range 1.99 to 2.00 GeV.
Differential cross section for the W range 2.00 to 2.01 GeV.
Differential cross section for the W range 2.01 to 2.02 GeV.
Differential cross section for the W range 2.02 to 2.03 GeV.
Differential cross section for the W range 2.03 to 2.04 GeV.
Differential cross section for the W range 2.04 to 2.05 GeV.
Differential cross section for the W range 2.05 to 2.06 GeV.
Differential cross section for the W range 2.06 to 2.07 GeV.
Differential cross section for the W range 2.07 to 2.08 GeV.
Differential cross section for the W range 2.08 to 2.09 GeV.
Differential cross section for the W range 2.09 to 2.10 GeV.
Differential cross section for the W range 2.10 to 2.12 GeV.
Differential cross section for the W range 2.12 to 2.14 GeV.
Differential cross section for the W range 2.14 to 2.16 GeV.
Differential cross section for the W range 2.16 to 2.18 GeV.
Differential cross section for the W range 2.18 to 2.20 GeV.
Differential cross section for the W range 2.20 to 2.22 GeV.
Differential cross section for the W range 2.22 to 2.24 GeV.
Differential cross section for the W range 2.24 to 2.26 GeV.
Differential cross section for the W range 2.26 to 2.28 GeV.
Differential cross section for the W range 2.28 to 2.30 GeV.
Differential cross section for the W range 2.30 to 2.32 GeV.
Differential cross section for the W range 2.32 to 2.34 GeV.
Differential cross section for the W range 2.34 to 2.36 GeV.
Differential cross section for the W range 2.36 to 2.40 GeV.
Differential cross section for the W range 2.40 to 2.44 GeV.
Differential cross section for the W range 2.44 to 2.48 GeV.
Differential cross section for the W range 2.48 to 2.52 GeV.
Differential cross section for the W range 2.52 to 2.56 GeV.
Differential cross section for the W range 2.56 to 2.60 GeV.
Differential cross section for the W range 2.60 to 2.64 GeV.
Differential cross section for the W range 2.64 to 2.68 GeV.
Differential cross section for the W range 2.68 to 2.73 GeV.
Differential cross section for the W range 2.75 to 2.84 GeV.
High-statistics differential cross sections and spin density matrix elements for the reaction $\gamma p \to p \omega$ have been measured using the CLAS at Jefferson Lab for center-of-mass (CM) energies from threshold up to 2.84 GeV. Results are reported in 112 10-MeV wide CM energy bins, each subdivided into $\cos{\theta_{CM}^{\omega}}$ bins of width 0.1. These are the most precise and extensive $\omega$ photoproduction measurements to date. A number of prominent structures are clearly present in the data. Many of these have not previously been observed due to limited statistics in earlier measurements.
Differential cross section for the W range 1.72 to 1.73 GeV.
Differential cross section for the W range 1.73 to 1.74 GeV.
Differential cross section for the W range 1.74 to 1.75 GeV.
Differential cross section for the W range 1.75 to 1.76 GeV.
Differential cross section for the W range 1.76 to 1.77 GeV.
Differential cross section for the W range 1.77 to 1.78 GeV.
Differential cross section for the W range 1.78 to 1.79 GeV.
Differential cross section for the W range 1.79 to 1.80 GeV.
Differential cross section for the W range 1.80 to 1.81 GeV.
Differential cross section for the W range 1.81 to 1.82 GeV.
Differential cross section for the W range 1.82 to 1.83 GeV.
Differential cross section for the W range 1.83 to 1.84 GeV.
Differential cross section for the W range 1.84 to 1.85 GeV.
Differential cross section for the W range 1.85 to 1.86 GeV.
Differential cross section for the W range 1.86 to 1.87 GeV.
Differential cross section for the W range 1.87 to 1.88 GeV.
Differential cross section for the W range 1.88 to 1.89 GeV.
Differential cross section for the W range 1.89 to 1.90 GeV.
Differential cross section for the W range 1.90 to 1.91 GeV.
Differential cross section for the W range 1.91 to 1.92 GeV.
Differential cross section for the W range 1.92 to 1.93 GeV.
Differential cross section for the W range 1.93 to 1.94 GeV.
Differential cross section for the W range 1.94 to 1.95 GeV.
Differential cross section for the W range 1.96 to 1.97 GeV.
Differential cross section for the W range 1.97 to 1.98 GeV.
Differential cross section for the W range 1.98 to 1.99 GeV.
Differential cross section for the W range 1.99 to 2.00 GeV.
Differential cross section for the W range 2.00 to 2.01 GeV.
Differential cross section for the W range 2.01 to 2.02 GeV.
Differential cross section for the W range 2.02 to 2.03 GeV.
Differential cross section for the W range 2.03 to 2.04 GeV.
Differential cross section for the W range 2.04 to 2.05 GeV.
Differential cross section for the W range 2.05 to 2.06 GeV.
Differential cross section for the W range 2.06 to 2.07 GeV.
Differential cross section for the W range 2.07 to 2.08 GeV.
Differential cross section for the W range 2.08 to 2.09 GeV.
Differential cross section for the W range 2.09 to 2.10 GeV.
Differential cross section for the W range 2.10 to 2.11 GeV.
Differential cross section for the W range 2.11 to 2.12 GeV.
Differential cross section for the W range 2.12 to 2.13 GeV.
Differential cross section for the W range 2.13 to 2.14 GeV.
Differential cross section for the W range 2.14 to 2.15 GeV.
Differential cross section for the W range 2.15 to 2.16 GeV.
Differential cross section for the W range 2.16 to 2.17 GeV.
Differential cross section for the W range 2.17 to 2.18 GeV.
Differential cross section for the W range 2.18 to 2.19 GeV.
Differential cross section for the W range 2.19 to 2.20 GeV.
Differential cross section for the W range 2.20 to 2.21 GeV.
Differential cross section for the W range 2.21 to 2.22 GeV.
Differential cross section for the W range 2.22 to 2.23 GeV.
Differential cross section for the W range 2.23 to 2.24 GeV.
Differential cross section for the W range 2.24 to 2.25 GeV.
Differential cross section for the W range 2.25 to 2.26 GeV.
Differential cross section for the W range 2.26 to 2.27 GeV.
Differential cross section for the W range 2.27 to 2.28 GeV.
Differential cross section for the W range 2.28 to 2.29 GeV.
Differential cross section for the W range 2.29 to 2.30 GeV.
Differential cross section for the W range 2.30 to 2.31 GeV.
Differential cross section for the W range 2.31 to 2.32 GeV.
Differential cross section for the W range 2.32 to 2.33 GeV.
Differential cross section for the W range 2.33 to 2.34 GeV.
Differential cross section for the W range 2.34 to 2.35 GeV.
Differential cross section for the W range 2.35 to 2.36 GeV.
Differential cross section for the W range 2.36 to 2.37 GeV.
Differential cross section for the W range 2.37 to 2.38 GeV.
Differential cross section for the W range 2.38 to 2.39 GeV.
Differential cross section for the W range 2.39 to 2.40 GeV.
Differential cross section for the W range 2.40 to 2.41 GeV.
Differential cross section for the W range 2.41 to 2.42 GeV.
Differential cross section for the W range 2.42 to 2.43 GeV.
Differential cross section for the W range 2.43 to 2.44 GeV.
Differential cross section for the W range 2.44 to 2.45 GeV.
Differential cross section for the W range 2.45 to 2.46 GeV.
Differential cross section for the W range 2.46 to 2.47 GeV.
Differential cross section for the W range 2.47 to 2.48 GeV.
Differential cross section for the W range 2.48 to 2.49 GeV.
Differential cross section for the W range 2.49 to 2.50 GeV.
Differential cross section for the W range 2.50 to 2.51 GeV.
Differential cross section for the W range 2.51 to 2.52 GeV.
Differential cross section for the W range 2.52 to 2.53 GeV.
Differential cross section for the W range 2.53 to 2.54 GeV.
Differential cross section for the W range 2.54 to 2.55 GeV.
Differential cross section for the W range 2.55 to 2.56 GeV.
Differential cross section for the W range 2.56 to 2.57 GeV.
Differential cross section for the W range 2.57 to 2.58 GeV.
Differential cross section for the W range 2.58 to 2.59 GeV.
Differential cross section for the W range 2.59 to 2.60 GeV.
Differential cross section for the W range 2.60 to 2.61 GeV.
Differential cross section for the W range 2.61 to 2.62 GeV.
Differential cross section for the W range 2.62 to 2.63 GeV.
Differential cross section for the W range 2.63 to 2.64 GeV.
Differential cross section for the W range 2.64 to 2.65 GeV.
Differential cross section for the W range 2.65 to 2.66 GeV.
Differential cross section for the W range 2.66 to 2.67 GeV.
Differential cross section for the W range 2.67 to 2.68 GeV.
Differential cross section for the W range 2.68 to 2.69 GeV.
Differential cross section for the W range 2.69 to 2.70 GeV.
Differential cross section for the W range 2.70 to 2.71 GeV.
Differential cross section for the W range 2.71 to 2.72 GeV.
Differential cross section for the W range 2.72 to 2.73 GeV.
Differential cross section for the W range 2.75 to 2.76 GeV.
Differential cross section for the W range 2.76 to 2.77 GeV.
Differential cross section for the W range 2.77 to 2.78 GeV.
Differential cross section for the W range 2.78 to 2.79 GeV.
Differential cross section for the W range 2.79 to 2.80 GeV.
Differential cross section for the W range 2.80 to 2.81 GeV.
Differential cross section for the W range 2.81 to 2.82 GeV.
Differential cross section for the W range 2.82 to 2.83 GeV.
Differential cross section for the W range 2.83 to 2.84 GeV.
Spin density matrix elements for the W range 1.72 to 1.73 GeV.
Spin density matrix elements for the W range 1.73 to 1.74 GeV.
Spin density matrix elements for the W range 1.74 to 1.75 GeV.
Spin density matrix elements for the W range 1.75 to 1.76 GeV.
Spin density matrix elements for the W range 1.76 to 1.77 GeV.
Spin density matrix elements for the W range 1.77 to 1.78 GeV.
Spin density matrix elements for the W range 1.78 to 1.79 GeV.
Spin density matrix elements for the W range 1.79 to 1.80 GeV.
Spin density matrix elements for the W range 1.80 to 1.81 GeV.
Spin density matrix elements for the W range 1.81 to 1.82 GeV.
Spin density matrix elements for the W range 1.82 to 1.83 GeV.
Spin density matrix elements for the W range 1.83 to 1.84 GeV.
Spin density matrix elements for the W range 1.84 to 1.85 GeV.
Spin density matrix elements for the W range 1.85 to 1.86 GeV.
Spin density matrix elements for the W range 1.86 to 1.87 GeV.
Spin density matrix elements for the W range 1.87 to 1.88 GeV.
Spin density matrix elements for the W range 1.88 to 1.89 GeV.
Spin density matrix elements for the W range 1.89 to 1.90 GeV.
Spin density matrix elements for the W range 1.90 to 1.91 GeV.
Spin density matrix elements for the W range 1.91 to 1.92 GeV.
Spin density matrix elements for the W range 1.92 to 1.93 GeV.
Spin density matrix elements for the W range 1.93 to 1.94 GeV.
Spin density matrix elements for the W range 1.94 to 1.95 GeV.
Spin density matrix elements for the W range 1.95 to 1.96 GeV.
Spin density matrix elements for the W range 1.96 to 1.97 GeV.
Spin density matrix elements for the W range 1.97 to 1.98 GeV.
Spin density matrix elements for the W range 1.98 to 1.99 GeV.
Spin density matrix elements for the W range 1.99 to 2.00 GeV.
Spin density matrix elements for the W range 2.00 to 2.01 GeV.
Spin density matrix elements for the W range 2.01 to 2.02 GeV.
Spin density matrix elements for the W range 2.02 to 2.03 GeV.
Spin density matrix elements for the W range 2.03 to 2.04 GeV.
Spin density matrix elements for the W range 2.04 to 2.05 GeV.
Spin density matrix elements for the W range 2.05 to 2.06 GeV.
Spin density matrix elements for the W range 2.06 to 2.07 GeV.
Spin density matrix elements for the W range 2.07 to 2.08 GeV.
Spin density matrix elements for the W range 2.08 to 2.09 GeV.
Spin density matrix elements for the W range 2.09 to 2.10 GeV.
Spin density matrix elements for the W range 2.10 to 2.11 GeV.
Spin density matrix elements for the W range 2.11 to 2.12 GeV.
Spin density matrix elements for the W range 2.12 to 2.13 GeV.
Spin density matrix elements for the W range 2.13 to 2.14 GeV.
Spin density matrix elements for the W range 2.14 to 2.15 GeV.
Spin density matrix elements for the W range 2.15 to 2.16 GeV.
Spin density matrix elements for the W range 2.16 to 2.17 GeV.
Spin density matrix elements for the W range 2.17 to 2.18 GeV.
Spin density matrix elements for the W range 2.18 to 2.19 GeV.
Spin density matrix elements for the W range 2.19 to 2.20 GeV.
Spin density matrix elements for the W range 2.20 to 2.21 GeV.
Spin density matrix elements for the W range 2.21 to 2.22 GeV.
Spin density matrix elements for the W range 2.22 to 2.23 GeV.
Spin density matrix elements for the W range 2.23 to 2.24 GeV.
Spin density matrix elements for the W range 2.24 to 2.25 GeV.
Spin density matrix elements for the W range 2.25 to 2.26 GeV.
Spin density matrix elements for the W range 2.26 to 2.27 GeV.
Spin density matrix elements for the W range 2.27 to 2.28 GeV.
Spin density matrix elements for the W range 2.28 to 2.29 GeV.
Spin density matrix elements for the W range 2.29 to 2.30 GeV.
Spin density matrix elements for the W range 2.30 to 2.31 GeV.
Spin density matrix elements for the W range 2.31 to 2.32 GeV.
Spin density matrix elements for the W range 2.32 to 2.33 GeV.
Spin density matrix elements for the W range 2.33 to 2.34 GeV.
Spin density matrix elements for the W range 2.34 to 2.35 GeV.
Spin density matrix elements for the W range 2.35 to 2.36 GeV.
Spin density matrix elements for the W range 2.36 to 2.37 GeV.
Spin density matrix elements for the W range 2.37 to 2.38 GeV.
Spin density matrix elements for the W range 2.38 to 2.39 GeV.
Spin density matrix elements for the W range 2.39 to 2.40 GeV.
Spin density matrix elements for the W range 2.40 to 2.41 GeV.
Spin density matrix elements for the W range 2.41 to 2.42 GeV.
Spin density matrix elements for the W range 2.42 to 2.43 GeV.
Spin density matrix elements for the W range 2.43 to 2.44 GeV.
Spin density matrix elements for the W range 2.44 to 2.45 GeV.
Spin density matrix elements for the W range 2.45 to 2.46 GeV.
Spin density matrix elements for the W range 2.46 to 2.47 GeV.
Spin density matrix elements for the W range 2.47 to 2.48 GeV.
Spin density matrix elements for the W range 2.48 to 2.49 GeV.
Spin density matrix elements for the W range 2.49 to 2.50 GeV.
Spin density matrix elements for the W range 2.50 to 2.51 GeV.
Spin density matrix elements for the W range 2.51 to 2.52 GeV.
Spin density matrix elements for the W range 2.52 to 2.53 GeV.
Spin density matrix elements for the W range 2.53 to 2.54 GeV.
Spin density matrix elements for the W range 2.54 to 2.55 GeV.
Spin density matrix elements for the W range 2.55 to 2.56 GeV.
Spin density matrix elements for the W range 2.56 to 2.57 GeV.
Spin density matrix elements for the W range 2.57 to 2.58 GeV.
Spin density matrix elements for the W range 2.58 to 2.59 GeV.
Spin density matrix elements for the W range 2.59 to 2.60 GeV.
Spin density matrix elements for the W range 2.60 to 2.61 GeV.
Spin density matrix elements for the W range 2.61 to 2.62 GeV.
Spin density matrix elements for the W range 2.62 to 2.63 GeV.
Spin density matrix elements for the W range 2.63 to 2.64 GeV.
Spin density matrix elements for the W range 2.64 to 2.65 GeV.
Spin density matrix elements for the W range 2.65 to 2.66 GeV.
Spin density matrix elements for the W range 2.66 to 2.67 GeV.
Spin density matrix elements for the W range 2.67 to 2.68 GeV.
Spin density matrix elements for the W range 2.68 to 2.69 GeV.
Spin density matrix elements for the W range 2.69 to 2.70 GeV.
Spin density matrix elements for the W range 2.70 to 2.71 GeV.
Spin density matrix elements for the W range 2.71 to 2.72 GeV.
Spin density matrix elements for the W range 2.72 to 2.73 GeV.
Spin density matrix elements for the W range 2.73 to 2.74 GeV.
Spin density matrix elements for the W range 2.74 to 2.75 GeV.
Spin density matrix elements for the W range 2.75 to 2.76 GeV.
Spin density matrix elements for the W range 2.76 to 2.77 GeV.
Spin density matrix elements for the W range 2.77 to 2.78 GeV.
Spin density matrix elements for the W range 2.78 to 2.79 GeV.
Spin density matrix elements for the W range 2.79 to 2.80 GeV.
Spin density matrix elements for the W range 2.80 to 2.81 GeV.
Spin density matrix elements for the W range 2.81 to 2.82 GeV.
Spin density matrix elements for the W range 2.82 to 2.83 GeV.
Spin density matrix elements for the W range 2.83 to 2.84 GeV.
We measured the inclusive electron-proton cross section in the nucleon resonance region (W < 2.5 GeV) at momentum transfers Q**2 below 4.5 (GeV/c)**2 with the CLAS detector. The large acceptance of CLAS allowed for the first time the measurement of the cross section in a large, contiguous two-dimensional range of Q**2 and x, making it possible to perform an integration of the data at fixed Q**2 over the whole significant x-interval. From these data we extracted the structure function F2 and, by including other world data, we studied the Q**2 evolution of its moments, Mn(Q**2), in order to estimate higher twist contributions. The small statistical and systematic uncertainties of the CLAS data allow a precise extraction of the higher twists and demand significant improvements in theoretical predictions for a meaningful comparison with new experimental results.
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