GAMMA P --> PI0 P
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Angular dependence of the recoil proton polarization from the reaction $\gamma p \to \pi^0 p$ for photon energies between 360-MeV and 1200-MeV

Blum, P. ; Brinckmann, P. ; Brockmann, R. ; et al.
BONN-PI-1-105, 1970.
Inspire Record 1085812 DOI 10.17182/hepdata.70500

None

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Polarization of recoil protons from neutral pion photoproduction

Lundquist, David Eugene ;
PhD Thesis, Stanford U., 1967.
Inspire Record 1408653 DOI 10.17182/hepdata.16895

None

1 data table

Forward Photoproduction of Neutral Pions on Polarized Protons in the Third Resonance Region

Herr, H. ; Husmann, D. ; Jansen, W. ; et al.
Nucl.Phys.B 125 (1977) 157-161, 1977.
Inspire Record 118996 DOI 10.17182/hepdata.50398

Angular distributions of the target symmetry for the reaction γ + p → π 0 + p have been measured at the Bonn 2.5 GeV Electron Synchrotron at pion c.m. angles between 13° and 63° and photon energies of 1.0 and 1.1 GeV. The π 0 mesons were detected by their two decay photons with total absorption lead-glass Čerenkov counters. Butanol was used as target material in a continuous flow 3 He cryostat operating at 0.5 K and 25 kG. The π 0 counting rate from free protons in the butanol target was derived from the measurements of the differential cross section on hydrogen. The data are compared with data of other laboratories and the results of two recent partial-wave analyses.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


The Photoproduction of Neutral Pions from Protons Between 0.7-GeV and 1.7-GeV

Barton, J.S. ; Booth, P.S.L. ; Carroll, L.J. ; et al.
Nucl.Phys.B 84 (1975) 449-466, 1975.
Inspire Record 90496 DOI 10.17182/hepdata.32128

Measurements of differential cross sections for pi-zero photoproduction from protons have been made at angles between 60° and 140° c.m. in the photon energy range 0.7 GeV to 1.7 GeV. The data are compared with the rits provided by three recent partial-wave analyses of pion photoproduction and some significant discrepancies observed.

9 data tables
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Measurement of the polarization of the recoil protons from the reaction $\gamma + \rho \rightarrow \rho + \pi^0$ in the region of the second resonance at low pion center of mass angles

Trines, Dieter ; Althoff, K.H. ;
PhD Thesis, Bonn U., Math. Inst., 1972.
Inspire Record 1396209 DOI 10.17182/hepdata.37154

None

1 data table
Table 1

No description provided.


Some cross-sections for the photo-production of neutral Pi-mesons from hydrogen at energies from 360 to 938 MeV

Dougan, P. ; Kivikas, T. ; Lugner, K. ; et al.
Z.Phys.A 274 (1975) 73-78, 1975.
Inspire Record 1385254 DOI 10.17182/hepdata.16654

Some cross-sections for the photo-production of ~z~ from hydrogen for pion c.m. angles in the range 60~ ~ are presented. The data have been obtained by measuring proton yields from a hydrogen target, thus permitting separation of single-pion production from the strong background caused by double-pion production. The values, which extend from 360 to 938 MeV, show reasonable agreement with the results of a recent phase-shift analysis

1 data table
Table 1

No description provided.


Cross-Sections for the Photoproduction of pi0 Mesons from Hydrogen from 238-MeV to 922-MeV

Dougan, P. ; Ramsay, V. ; Stiefler, W. ;
Z.Phys.A 276 (1976) 155-160, 1976.
Inspire Record 99794 DOI 10.17182/hepdata.16656

The results of a comprehensive series of measurements of the cross-sections for the photo-production of π0-mesons from hydrogen at pion c.m. angles from 47 to 145 degrees are presented. The minimum and maximum photon energies have been 238 and 922 MeV respectively.

1 data table
Table 1

No description provided.


Neutral pion photoproduction off protons in the energy range 0.3-GeV < E(gamma) < 3-GeV.

The CB-ELSA collaboration Bartholomy, O. ; Crede, V. ; van Pee, H. ; et al.
Phys.Rev.Lett. 94 (2005) 012003, 2005.
Inspire Record 654179 DOI 10.17182/hepdata.41902

Single pi0 photoproduction has been studied with the CB-ELSA experiment at Bonn using tagged photon energies between 0.3 and 3.0 GeV. The experimental setup covers a very large solid angle of about 98% of 4 pi. Differential cross sections (d sigma)/(d Omega) have been measured. Complicated structures in the angular distributions indicate a variety of different resonances being produced in the s channel intermediate state gamma p --> N* (Delta*) --> p pi0. A combined analysis including the data presented in this letter along with other data sets reveals contributions from known resonances and evidence for a new resonance N(2070)D15.

14 data tables
Table 1

Total cross section for GAMMA P --> P PI0 obtained by integration of the angular distributions and extrapolation into the forward and backward regions using the PWA result.

Table 2

Differential cross section as a function of c.m. angle for the photon energy range 300 to 425 GeV.

Table 3

Differential cross section as a function of c.m. angle for the photon energy range 425 to 550 GeV.

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Some differential cross-section for neutral pion photoproduction in the photon energy range 350-850 mev

Dougan, P. ; Kivikas, T. ; Lugner, K. ; et al.
Phys.Lett.B 49 (1974) 194-196, 1974.
Inspire Record 95300 DOI 10.17182/hepdata.27968

The preliminary results of measurements of differential cross-sections for the photo-production of neutral pions from protons are given. The data fall in the range 60–125 degrees in pion c.m. angle and 350 to 850 MeV in photon energy.

8 data tables
Table 1

Axis error includes +- 10/10 contribution (ESTIMATED ERROR DUE TO PRELIMINARY NATURE OF DATA).

Table 2

Axis error includes +- 10/10 contribution (ESTIMATED ERROR DUE TO PRELIMINARY NATURE OF DATA).

Table 3

Axis error includes +- 10/10 contribution (ESTIMATED ERROR DUE TO PRELIMINARY NATURE OF DATA).

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Recoil Proton Polarization of Neutral Pion Photoproduction From Proton in the Energy Range Between 400-{MeV} and 1142-{MeV}

Kato, S. ; Miyachi, T. ; Sugano, K. ; et al.
Nucl.Phys.B 168 (1980) 1-16, 1980.
Inspire Record 142131 DOI 10.17182/hepdata.34517

The recoil proton polarization of the reaction γ p → π 0 p was measured at a c.m. angle of 100° for incident photon energies between 451 and 1106 MeV, and at an angle of 130° for energies from 400 to 1142 MeV. One photon, decayed from a π 0 meson, and a recoil proton were detected in coincidence. Two kinds of polarization analyzer were employed. In the range of proton kinetic energy less than 420 MeV and higher than 346 MeV, carbon plates and liquid hydrogen were used for determining the polarization, respectively. The data given by the two polarimeter systems are in good agreement. Results are compared with recent phenomenological analyses. From the comparison between the present data and the polarized target data, the invariant amplitude A 3 can be estimated to be small.

4 data tables
Table 1

RESULT WITH THE CARBON POLARIMETER.

Table 2

RESULT WITH THE CARBON POLARIMETER.

Table 3

RESULT WITH THE HYDROGEN POLARIMETER.

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