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Neutral Pion Electroproduction in the Resonance Region at High $Q^2$

Villano, A.N. ; Stoler, P. ; Bosted, P.E. ; et al.

Phys.Rev.C 80 (2009) 035203, 2009.

Inspire Record 823260 DOI 10.17182/hepdata.54189

The process $ep \to e^{\prime}p^{\prime}\pi^0$ has been measured at $Q^2$ = 6.4 and 7.7 \ufourmomts in Jefferson Lab's Hall C. Unpolarized differential cross sections are reported in the virtual photon-proton center of mass frame considering the process $\gamma^{\ast}p \to p^{\prime}\pi^0$. Various details relating to the background subtractions, radiative corrections and systematic errors are discussed. The usefulness of the data with regard to the measurement of the electromagnetic properties of the well known $\Delta(1232)$ resonance is covered in detail. Specifically considered are the electromagnetic and scalar-magnetic ratios $R_{EM}$ and $R_{SM}$ along with the magnetic transition form factor $G_M^{\ast}$. It is found that the rapid fall off of the $\Delta(1232)$ contribution continues into this region of momentum transfer and that other resonances

45 data tables match query

Table 51

Differential cross sections at Q**2=6.212 GeV**2, EPSILON=0.4411, W=1.312 GeV and COS(THETA(*))=-0.9 for the small SOS spectrometer.

Table 52

Differential cross sections at Q**2=6.212 GeV**2, EPSILON=0.4411, W=1.312 GeV and COS(THETA(*))=-0.7 for the small SOS spectrometer.

Table 53

Differential cross sections at Q**2=6.212 GeV**2, EPSILON=0.4411, W=1.312 GeV and COS(THETA(*))=-0.5 for the small SOS spectrometer.

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Measurement of pi0 photoproduction on the proton from 550-MeV to 1500-MeV at GRAAL

The GRAAL collaboration Bartalini, O. ; Bellini, V. ; Bocquet, J.P. ; et al.

Eur.Phys.J.A 26 (2005) 399-419, 2005.

Inspire Record 703671 DOI 10.17182/hepdata.11281

Neutral pion photoproduction has been measured from 550 to 1500 MeV with the GRAAL facility, located at the ESRF in Grenoble. Differential cross-section and beam asymmetry have been measured over a wi

2 data tables match query

Table 1

Measured differential angular distribution for incident photon energy 555 Mev.

Table 51

Measured beam asymmetries for incident photon energy 551 Mev.

Measures of the differential effective sections $\pi ±p$ to 410 MeV and 490 MeV forwards

Banner, M. ; Detoeuf, J.F. ; Fayoux, M.L. ; et al.

Nuovo Cim.A 50 (1967) 431-448, 1967.

Inspire Record 1185325 DOI 10.17182/hepdata.896

Measurements of π±p elastic differential cross-sections have been performed in the forward direction, using a missing-mass spark chamber spectrometer. The films have been seanned by an automatic apparatus. A phase-shift analysis of the experimental data has been done, leading to three solutions. Various experiments are proposed in order to resolve the ambiguities.

2 data tables match query

Table 1

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Table 3

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