Althoff, K.H.
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Measurement of the polarization of the recoil neutron from the photoproduction of charged pions on hydrogen

Althoff, K.H. ; Piel, H. ; Wallraff, W. ; et al.
Phys.Lett.B 26 (1968) 640-641, 1968.
Inspire Record 1099537 DOI 10.17182/hepdata.29335

The polarization of the recoil neutron in the reaction γ + p → π + + n has been measured for a pion c.m.-angle of 90° and a photon energy of 390 MeV. Hydrogen was used as the polarization analyser.

1 data table
Table 1

No description provided.


Recoil polarization in K$^+ \Lambda$ photoproduction at 5 gev

Vogel, G. ; Burfeindt, H. ; Buschhorn, G. ; et al.
Phys.Lett.B 40 (1972) 513-516, 1972.
Inspire Record 75679 DOI 10.17182/hepdata.28291

The Λ polarization in the reaction γp → K + Λ has been measured using the decay Λ → pπ − as an analyzer. It is found to be large and negative in the momentum transer range 0.2 ⩽ | t | ⩽ 1.0 (GeV/ c ) 2 .

1 data table
Table 1

No description provided.


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.


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

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 3

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).

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Production of high transverse momentum particles in p p collisions in the central region at the CERN ISR

The British-Scandinavian ISR collaboration Alper, B. ; Boggild, H. ; Jarlskog, G. ; et al.
Phys.Lett.B 44 (1973) 521-526, 1973.
Inspire Record 85256 DOI 10.17182/hepdata.28095

The inclusive production al all charged particles of transverse momentum p T between 1.5 and 4.4 GeV/ c at centre of mass angles 90° and 59.4° from p-p-collisions with √ s = 44 and 53 GeV has been measured. No strong energy dependence is observed for these transverse momenta.

6 data tables
Table 1

Errors are statistical only.

Table 2

Errors are statistical only.

Table 3

Errors are statistical only.

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The inclusive single-particle spectra of pi-, K0(s) and Lambda in proton proton collisions at 19-GeV/c

The Scandinavian Bubble Chamber collaboration Boeggild, H. ; Dahl-Jensen, E. ; Hansen, K.H. ; et al.
Nucl.Phys.B 57 (1973) 77-99, 1973.
Inspire Record 84068 DOI 10.17182/hepdata.32535

Data on the inclusive production spectra of K S 0 and Λ from proton-proton collisions at 19 GeV are presented and discussed in connection with the earlier studied inclusive π − production spectrum. The three single-particle spectra are compared with a crude two-center thermal model for the average radiation from the pp collisions.

1 data table
Table 1

No description provided.


Photoproduction of pi+ mesons on polarized protons at photon energies between 0.5 and 2.2 gev

Althoff, K.H. ; Feller, P. ; Herr, H. ; et al.
Nucl.Phys.B 53 (1973) 9-18, 1973.
Inspire Record 84220 DOI 10.17182/hepdata.32593

The target asymmetry T = ( σ ↑ − σ ↓)/( σ ↑ + σ ↓) for the reaction γ p → π + n has been measured at the Bonn 2.5 GeV electron synchrotron for a pion c.m. angle of 40° and γ energies between 0.5 and 2.2 GeV. Butanol was used as the target material. About 35% of the protons could be polarized using the dynamic-polarization method in a continuous-flow cryostat operating at 1°K and 25 kG. The π + mesons were detected in a magnetic-spectrometer system. Considerable structure in the asymmetry was observed.

1 data table
Table 1

Axis error includes +- 11/11 contribution.


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.


Pi0 electroproduction at the delta(1236) resonance at a four-momentum transfer of q-squared = 0.3(gev/c)-squared

Baetzner, K. ; Beck, U. ; Becks, K.H. ; et al.
Nucl.Phys.B 76 (1974) 1-14, 1974.
Inspire Record 94609 DOI 10.17182/hepdata.32274

The reaction e − + p → e − + p + π 0 has been studied in the region of the Δ (1236) resonance at a four-momentum transfer of the virtual photon of 0.3 (GeV/ c ) 2 . Angles and momenta of the secondary electron and of the outgoing proton were measured in coincidence to obtain the angular dependence of the differential cross section. The angular distribution for s- and p-waves of the pion in the πN cm-system was fitted to the cross section for three W -bins around the maximum of the resonance. The contribution of the resonant multipoles M 1+ , E 1+ and S 1+ to the cross section as well as the contribution of the background amplitudes M 1− , E 0+ and S 0+ are given.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


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.