Hahn, U.
[1.0, 2.0]
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Photoproduction of k+ lambda0 and k+ sigma0 from hydrogen at constant momentum transfer t between 1.05 and 2.2 gev

Feller, P. ; Menze, D. ; Opara, U. ; et al.
Nucl.Phys.B 39 (1972) 413-420, 1972.
Inspire Record 75243 DOI 10.17182/hepdata.32925

For the reaction γ p → K + Λ 0 the differential cross section has been measured at t = −0.147 GeV 2 ( θ C.M. = 26.5 ± 3.5°) and photoenergies between 1.05 and 2.2 GeV and for the reaction γ p→K + Σ 0 at ≈−0.17 GeV 2 ( θ C.M. = 28±3.5°) and photoenergies between 1.3 and 2.2 GeV. For this four momentum transfer the differential cross section of K + Λ 0 photoproduction has a surprising steep increase above threshold and stays nearly constant up to 2.2 GeV. The K + Σ 0 cross section increases from 1.3 to 1.56 GeV and goes down gradually at higher energies.

2 data tables
Table 1

AT CONSTANT MOMENTUM TRANSFER OF -T = 0.147 GEV**2.

Table 2

AT APPROXIMATELY CONSTANT MOMENTUM TRANSFER OF -T = 0.17 GEV**2.


Dip structures in pi+ p ---> rho+ p at 1.55-1.84 gev/c

Williamson, Y. ; Fung, S.Y. ; Kernan, A. ; et al.
Phys.Rev.Lett. 29 (1972) 1353-1356, 1972.
Inspire Record 75422 DOI 10.17182/hepdata.21440

Results of a high-statistics study of π++p→ρ++p at 1.55-1.84 GeVc are consistent with dominance of π and ω exchange close to threshold. A pronounced dip in ρ00sdσdt at −t≃0.4 GeV2 may be attributed to pion exchange with strong absorption.

9 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Polarisation of recoil neutrons from single-pion photoproduction off protons in the resonance region

Hahn, U. ; Wallraff, W. ; Weingarten, W. ;
BONN-PI-1-143, 1971.
Inspire Record 1498199 DOI 10.17182/hepdata.75407

None

1 data table
Table 1

No description provided.


Photoproduction of k+ lambda and k+ sigma0 from hydrogen between 1.3 and 1.45 gev

Bleckmann, A. ; Herda, S. ; Opara, U. ; et al.
Z.Phys. 239 (1970) 1-15, 1970.
Inspire Record 63868 DOI 10.17182/hepdata.16698

The differential cross section has been measured for the reaction γ+p→K+ + Λ atk=1.3 GeV andCM angles between 6 ° and 90 ° and for the reaction γ+p→K+ + ∑0 atk=1.45 GeV andCM angles between 10 ° and 85 °. In addition 10 differential cross sections of the two reactions in the energy region betweenk=1.327 and 1.416 GeV and angles between θcm=11.2 ° and 62 ° have been obtained. The results are compared with Regge-cut-model fits by Meyer zu Hörste and Pfeil1 taking into account all availableK+ photoproduction data.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Photoproduction of negative pions on neutrons at photon energies between 0.2-GeV and 2.0-GeV

The Aachen-Berlin-Bonn-Hamburg-Heidelberg-Muenchen collaboration Hilpert, H.G. ; Lauscher, P. ; Matziolis, M. ; et al.
Nucl.Phys.B 8 (1968) 535-544, 1968.
Inspire Record 56298 DOI 10.17182/hepdata.32389

Total and differenial cross sections of the reaction γ +n→p+ π − have been determined for photon-energies between 0.2 and 2.0 GGeV. Below 500 MeV the differential cross sections are compared with theoretical predictions derived from fixed-momentum-transfer dispersion relations.

30 data tables
Table 1

Axis error includes +- 0.0/0.0 contribution (5 TO 8////).

Table 2

Axis error includes +- 0.0/0.0 contribution (5 TO 8////).

Table 3

Axis error includes +- 0.0/0.0 contribution (5 TO 8////).

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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.


Photoproduction of $\pi^0$ in the Backward Direction

Buschhorn, G. ; Heide, P. ; Kotz, U. ; et al.
Phys.Rev.Lett. 20 (1968) 230-232, 1968.
Inspire Record 54459 DOI 10.17182/hepdata.21735

None

1 data table
Table 1

No description provided.


$\pi^+$ Photoproduction Between 1.2 and 3 GeV at Very Small Angles

Buschhorn, G. ; Carroll, J. ; Eandi, R.D. ; et al.
Phys.Rev.Lett. 18 (1967) 571-574, 1967.
Inspire Record 52312 DOI 10.17182/hepdata.21767

The reaction γ+p→π++n has been investigated for photon energies between 1.2 and 3 GeV and pion c.m. angles from 2.5 to 15°. The cross section is strongly peaked in the forward direction and shows resonance structure in the region of the N32*(1920) and N12*(2190).

10 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Photoproduction of Single Positive Pions Between 1.2 and 3 GeV

Buschhorn, G. ; Carroll, J. ; Eandi, R.D. ; et al.
Phys.Rev.Lett. 17 (1966) 1027-1030, 1966.
Inspire Record 50803 DOI 10.17182/hepdata.21795

Differential cross sections for the reaction γ+p→n+π+ are presented for incident photon energies between 1.2 and 3 GeV and pion center-of-mass production angles of 15 to 50 deg.

11 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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