HEPData Search

The reaction e+d→e′+n+p was studied at electron scattering angles θ ⩽ 35° for four-momentum transfers of 0.39, 0.565 and 0.78 (GeV/ c ) 2 . By recording electron-neutron and electron-proton coincidences, the ratio of the electron scattering cross sections on quasi-free neutrons and protons was determined. An estimate of the binding effects, based on a Chew-Low-extrapolation, was made. Values for the neutron form factors were derived.

2 data tables

Table 1

Axis error includes +- 0.0/0.0 contribution (Due to the different effective solid angles for neutron and proton detection in the counters).

Table 2

No description provided.

Measurement of inclusive photoproduction at 3.2 gev and comparison with electroproduction

Burfeindt, H. ; Buschhorn, G. ; Genzel, H. ; et al.

Phys.Lett.B 43 (1973) 345-348, 1973.

Inspire Record 84913 DOI 10.17182/hepdata.45255

Inclusive photoproduction cross sections for pions, kaons and protons have been measured in the photon fragmentation region and are compared with recent electroproduction data at q 2 = 1.16 (GeV/ c ) 2 . If the cross sections are normalized to the total hadronic cross sections at q 2 = 0 and q 2 = 1.16 (GeV/ c ) 2 , respectively, we observe that more pions, about an equal number of protons, but fewer kaons are found in the photoproduction case for x ≥ 0.3.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

Inelastic electron proton scattering at small four-momentum transfers as a test of finite-energy sum rules

Moritz, J. ; Schmidt, K.H. ; Wegener, D. ; et al.

Nucl.Phys.B 41 (1972) 336-352, 1972.

Inspire Record 75163 DOI 10.17182/hepdata.45250

The twofold differential cross section for the inelastic scattering of electrons on protons wa was measured as a function of the scattered electron energy for an electron scattering angle of 12°. The kinematic region covered in this experiment was 0.3 (GeV/ c ) 2 < q 2 < 1.0 (GeV/ c ) 2 and W < 2.9 GeV. The Bloom-Gilman as well as the constant scattering angle sum rule of Rittenberg and Rubinstein were tested.

5 data tables

Table 1

Axis error includes +- 0.0/0.0 contribution (3.7 TO 5////UNCERTAINTIES IN TARGET DENSITY, TARGET DIAMETER, SOLID ANGLE, E- SCATTERING ANGLE, INCIDENT E- ENERGY, DEAD TIME CORRECTIONS, CONSTANT OF FARADAY-CUP INTEGRATOR EFFICIENCY OF SPARK CHAMBERS, RADIATIVE CORRECTIONS).

Table 2

Table 3

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Electroproduction of pions near the $\Delta(1236)$ isobar and the form-factor $G^*_M(q^2)$ of the $({\gamma} N\Delta)$ vertex

Bartel, W. ; Dudelzak, B. ; Krehbiel, H. ; et al.

Phys.Lett.B 28 (1968) 148-151, 1968.

Inspire Record 52791 DOI 10.17182/hepdata.45279

The cross section for inelastic electron-proton scattering was measured at incident electron energies of 1.5 to 6 GeV by magnetic analysis of the scattered electrons at angles between 10° and 35°. For invariant masses of the hardonic final state W ⩽ 1.4 GeV. the measured spectra are compared with theoretical predictions for electroproduction of the Δ(1236) isobar. The magnetic dipole transition form factor G ∗ M ( q 2 ) of the (γ N Δ)-vertex is derived for momentum transfers q 2 = 0.2 − 2.34 (GeV/ c ) 2 ard found to decrease more rapidly with q 2 than the proton form factors.

1 data table

Table 1

Axis error includes +- 0.0/0.0 contribution.

Pi+ Electroproduction Above the Resonance Region

Brauel, P. ; Canzler, T. ; Cords, D. ; et al.

Phys.Lett.B 65 (1976) 181-183, 1976.

Inspire Record 109471 DOI 10.17182/hepdata.45245

The reaction e + p → e' + n + π + was studied detecting e' and e' and π + in coincidence at an invariant hadronic mass of 2.19 GeV. The measurements were performed at electron four-momentum transfers squared of Q 2 = 0.06, 0.28, 0.70, and 1.35 GeV 2 in the range of t = ( γ v − π ) 2 between t min and −1.0 GeV 2 . The cross section d 2 σ / dtd was found to be roughly independent of Q 2 for Q 2 > 0.7 GeV 2 and ∥ t ∥ > 0.2 GeV 2 .

7 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Electromagnetic proton form-factors at squared four momentum transfers between 1-GeV/c2 and 3-GeV/c2

Bartel, W. ; Busser, F.W. ; Dix, W.R. ; et al.

Phys.Lett.B 33 (1970) 245-248, 1970.

Inspire Record 63047 DOI 10.17182/hepdata.45284

Electron-proton elastic scattering cross sections have been measured at four-momentum transfers between 1.0 and 3.0 (GeV/ c ) 2 and at electron scattering angles between 10° and 20° and at about 86° in the laboratory. The proton electromagnetic form factors G E and G M were determined. The results indicate that G E ( q 2 ) decreases faster with increasing q 2 than G M ( q 2 ).

2 data tables

Table 1

Axis error includes +- 2.5/2.5 contribution (Due to counting statisticss, separation of elastic events, beam monitoring, incident energy, scattering angle, proton absorption, solid angle, target length and density).

Table 2

CONST(NAME=MU) is the magnetic moment.