Ball, J.P.
nucl-ex
DSIG/DOMEGA
[1.959]
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eta' photoproduction on the proton for photon energies from 1.527-GeV to 2.227-GeV.

The CLAS collaboration Dugger, M. ; Ball, J.P. ; Collins, P. ; et al.
Phys.Rev.Lett. 96 (2006) 062001, 2006.
Inspire Record 700399 DOI 10.17182/hepdata.31553

Differential cross sections for the reaction gamma p -> eta-prime p have been measured with the CLAS spectrometer and a tagged photon beam with energies from 1.527 to 2.227 GeV. The results reported here possess much greater accuracy than previous measurements. Analyses of these data indicate for the first time the coupling of the etaprime N channel to both the S_11(1535) and P_11(1710) resonances, known to couple strongly to the eta N channel in photoproduction on the proton, and the importance of j=3/2 resonances in the process.

5 data tables
Table 1

Differential cross sections for ETAPRIME photoproduction on the proton at photon energies 1.527, 1.577 and 1.627 GeV. The errors shown are combined statistical and systematic.

Table 2

Differential cross sections for ETAPRIME photoproduction on the proton at photon energies 1.677, 1.728 and 1.779 GeV. The errors shown are combined statistical and systematic.

Table 3

Differential cross sections for ETAPRIME photoproduction on the proton at photon energies 1.829, 1.879 and 1.930 GeV. The errors shown are combined statistical and systematic.

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ELECTROPRODUCTION OF pi0 MESONS ON PROTONS AT W = 1400-MeV TO 2000-MeV, q**2 = 0.01-GeV**2 TO 0.1-GeV**2, AND t = 0.6-GeV**2 TO 2.2-GeV**2 CORRESPONDING TO Theta (CM) pi = 145-degrees TO 180-degrees

Blume, H. ; Farber, R. ; Feldmann, N. ; et al.
Z.Phys.C 16 (1983) 283, 1983.
Inspire Record 180101 DOI 10.17182/hepdata.16387

The electroproduction of π0-mesons on protons has been measured with electrons of 1.7 and 2.1 GeV energy in the region of the nucleon resonances at\(W = \sqrt {(q + p)^2 }= 1,400 - 2,000MeV\) at rather low values of |q2|=|(e−e′)2|=0.01–0.1 GeV2 but at high values of the nucleon recoil |t|=|(p−p′)2|≈0.6–2.2 GeV2 corresponding to\(\Theta _\pi ^{cm}\approx 145^ \circ- 180^ \circ\). Up toW≈1,650 MeV the cross section for π0-production with virtual photons of |q2|≈0.03 GeV2 is only slightly smaller than that with real photons. ForW≳1,700 MeV the cross section at |q2|≈0.03 GeV2 is on average a factor of 2 smaller than that atq2=0 but only slightly higher than that at |q2|≈0.3–1 GeV2.

6 data tables
Table 1

INCLUDING RADIATIVE CORRECTIONS.

Table 2

INCLUDING RADIATIVE CORRECTIONS.

Table 3

INCLUDING RADIATIVE CORRECTIONS.

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Pi- p forward elastic scattering near 1 gev/c

Abillon, J.M. ; Borg, A. ; Crozon, M. ; et al.
Nucl.Phys.B 46 (1972) 630-636, 1972.
Inspire Record 74955 DOI 10.17182/hepdata.8020

We have measured the differential cross section of the reaction π − p→ π − p in the range 0.92 ⩽ cos θ c.m. ⩽ 0.99 at 15 momenta between 0.875 and 1.580 GeV/ c . The results we report complete the available data; previous measurements of this reaction do not extend beyond cos θ c.m. =0.90. We compare our experimental results with dispersion relation predictions. A comparison of our results for B , the slope of the differential cross section, with earlier results shows many discrepancies.

17 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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