HEPData Search

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Electroproduction of eta-mesons at the s(11)(1535) resonance

Beck, U. ; Becks, K.H. ; Burkert, V. ; et al.

Phys.Lett.B 51 (1974) 103-105, 1974.

Inspire Record 95168 DOI 10.17182/hepdata.27938

The reaction e − + p → e − + p + η has been studied in the region of the S 11 (1535)-resonance by detecting the recoil proton in coincidence with the scattered electron. The reaction has been observed at three four-momentum transfers of the virtual photon: q 2 = 0.2, 0.28 and 0.4 (GeV/ c ). First results of the differential cross section measurements are given and compared with quark model calculations.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Electromagnetic form-factors of the proton at squared four momentum transfers between 10-fm-2 and 50 fm-2

Berger, C ; Burkert, V. ; Knop, G. ; et al.

Phys.Lett.B 35 (1971) 87-89, 1971.

Inspire Record 69362 DOI 10.17182/hepdata.28478

Electron-proton elastic scattering cross sections have been measured to determine the proton electromagnetic form factors at squared four-momentum transfers q 2 between 10 and 50 fm −2 . At these values of q 2 we measured angular distributions between 25° and 110° and in addition at 25° and 35° cross sections for q 2 from 2 to 20 fm −2 using the external electron beam of the Bonn 2.5 GeV electron synchrotron. Our results confirm deviations from the scaling law.

15 data tables

Table 1

Axis error includes +- 2/2 contribution (NORMALIZATION ERROR).

Table 2

Axis error includes +- 2/2 contribution (NORMALIZATION ERROR).

Table 3

Axis error includes +- 2/2 contribution (NORMALIZATION ERROR).