Polarization
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Asymmetry ratios in the photoproduction of π + by linearly polarized γ-rays in the energy range 200–400 MeV

Gorenstein, P. ; Grilli, M. ; Soso, F. ; et al.
Phys.Lett. 23 (1966) 394-396, 1966.
Inspire Record 1392866 DOI 10.17182/hepdata.30179

The asymmetry ratio for the process γ + p → n + π + by linearly polarized γ rays are reported for E γ = 200 − 400 MeV and for θ (production angle of π in the c.m. system) = 90°. The experimental results are compared with some recent theoretical predictions.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Measurement of the angular dependence of the polarization of the recoil protons from the photoproduction of neutral pions on hydrogen at proton energies between 240 and 420 MeV

Althoff, K.H. ; Finken, D. ; Minatti, N. ; et al.
Phys.Lett.B 26 (1968) 677-678, 1968.
Inspire Record 1392747 DOI 10.17182/hepdata.29304

New measurements of the polarization of the recoil protons from the reaction γ + p → π o + p are reported for the region of the first resonance. These measurements are an extension of earlier experiments, done on the 500 MeV-electron-synchroton. More data have been taken at photon energies of 240, 300, 360 and 420 MeV.

1 data table
Table 1

No description provided.


Positive-pion photoproduction by linearly polarized $\gamma$ rays. I: experimental method and results

Grilli, M. ; Spillantini, P. ; Soso, F. ; et al.
Nuovo Cim. 54 (1968) 877-896, 1968.
Inspire Record 1185332 DOI 10.17182/hepdata.37567

The apparatus and the experimental method used for the measurements of the single-π+ photoproduction by linearly polarized γ rays are described. The present results on the asymmetry ratioA (θ) are summaized. The range covered by our results is θ=(30÷145)o (c.m.) andE γ=(200÷450) MeV.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Measurement of the reaction gamma p --> K0 Sigma+ at photon energies up to 2.6-GeV.

Lawall, R. ; Barth, J. ; Bennhold, C. ; et al.
Eur.Phys.J.A 24 (2005) 275-286, 2005.
Inspire Record 680746 DOI 10.17182/hepdata.43595

The reaction gamma p --> K0 Sigma+ was measured in the photon energy range from threshold up to 2.6 GeV with the SAPHIR detector at the electron stretcher facility, ELSA, in Bonn. Results are presented on the reaction cross section and the polarization of the Sigma+ as a function of the kaon production angle in the centre-of-mass system, cos(Theta_K^{c.m.}), and the photon energy. The cross section is lower and varies less with photon energy and kaon production angle than that of gamma p --> K+ Sigma0. The Sigma+ is polarized predominantly at cos(Theta_K^{c.m.}) \approx 0. The data presented here are more precise than previous ones obtained with SAPHIR and extend the photon energy range to higher values. They are compared to isobar model calculations.

14 data tables
Table 1

Axis error includes +- 10/10 contribution (Normalization uncertainty already included.).

Table 2

Axis error includes +- 10/10 contribution (Normalization uncertainty already included.).

Table 3

Axis error includes +- 10/10 contribution (Normalization uncertainty already included.).

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Measurement of the Antilambda polarization in nu/mu charged current interactions in the NOMAD experiment.

The NOMAD collaboration Astier, P. ; Autiero, D. ; Baldisseri, A. ; et al.
Nucl.Phys.B 605 (2001) 3-14, 2001.
Inspire Record 554759 DOI 10.17182/hepdata.48928

We present a measurement of the polarization of Antilambda hyperons produced in nu_mu charged current interactions. The full data sample from the NOMAD experiment has been analyzed using the same V0 identification procedure and analysis method reported in a previous paper for the case of Lambda hyperons. The Antilambda polarization has been measured for the first time in a neutrino experiment. The polarization vector is found to be compatible with zero.

2 data tables
Table 1

Lambdabar polarization in regions of Feynman X (XL).

Table 2

Lambdabar polarization in regions of the Bjorken scaling variable X.


EXPERIMENTAL STUDIES OF THE SIGMA, T, P POLARIZATION PARAMETERS AND THE GAMMA P ---> P PI0 REACTION MULTIPOLE ANALYSIS IN THE FIRST RESONANCE REGION

Belyaev, A.a. ; Getman, V.a. ; Gorbenko, V.g. ; et al.
Nucl.Phys.B 213 (1983) 201-222, 1983.
Inspire Record 192457 DOI 10.17182/hepdata.34021

A description is given of the experimental techniques and investigation results of the parameters Σ , T , P for the γ p→p π 0 reaction using linear polarized photons and a polarized proton target. The measurements have been made in the photon energy range 280–450 MeV at pion c.m. angles between 60° and 135°. The new experimental data are used in an energy-independent channel multipole analysis without the Watson theorem.

8 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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POLARIZATION PARAMETERS SIGMA, T, P FOR THE REACTION GAMMA P ---> P PI0 NEAR THE FIRST RESONANCE. (IN RUSSIAN)

Belyaev, A.A. ; Getman, V.A. ; Gorbenko, V.G. ; et al.
Yad.Fiz. 35 (1982) 693-699, 1982.
Inspire Record 179827 DOI 10.17182/hepdata.18756

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Measurement of asymmetry in spin dependent e p resonance region scattering.

Baum, Guenter ; Bergstrom, M.R. ; Clendenin, J.E. ; et al.
Phys.Rev.Lett. 45 (1980) 2000, 1980.
Inspire Record 154062 DOI 10.17182/hepdata.20698

The first measurements are reported of the asymmetry in resonance-region scattering of longitudinally polarized electrons by longitudinally polarized protons. Data have been obtained at Q2=0.5 and 1.5 (GeV/c)2 in the missing-mass range W=1.1−1.9 GeV. Results are compatible with a multipole analysis of single-pion electroproduction. The spin-dependent behavior is consistent with a duality mechanism as in the unpolarized case.

4 data tables
Table 1

ELECTRON ASYMMETRY AT Q**2 ABOUT 0.5 GEV**2.

Table 2

ELECTRON ASYMMETRY AT Q**2 ABOUT 1.5 GEV**2.

Table 3

PHOTON ASYMMETRY AT Q**2 ABOUT 0.5 GEV**2.

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PRODUCTION OF POSITIVE PIONS ON POLARIZED PROTONS BY LINEARLY POLARIZED PHOTONS IN THE ENERGY REGION 300-MEV - 420-MEV. (IN RUSSIAN)

Getman, V.A. ; Gorbenko, V.G. ; Grushin, V.F. ; et al.
Yad.Fiz. 32 (1980) 1008-1019, 1980.
Inspire Record 159789 DOI 10.17182/hepdata.18891

None

6 data tables
Table 1

SEE ABBREVIATIONS IN CR.

Table 2

SEE ABBREVIATIONS IN CR.

Table 3

SEE ABBREVIATIONS IN CR.

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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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