Perroud, J.P
Polarization
DSIG/DOMEGA
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Measurement of eta photoproduction on the proton from threshold to 1500-MeV

The GRAAL collaboration Bartalini, O. ; Bellini, V. ; Bocquet, J.P. ; et al.
Eur.Phys.J.A 33 (2007) 169-184, 2007.
Inspire Record 755415 DOI 10.17182/hepdata.51526

Beam asymmetry and differential cross section for the reaction gamma+p->eta+p were measured from production threshold to 1500 MeV photon laboratory energy. The two dominant neutral decay modes of the eta meson, eta->2g and eta->3pi0, were analyzed. The full set of measurements is in good agreement with previously published results. Our data were compared with three models. They all fit satisfactorily the results but their respective resonance contributions are quite different. The possible photoexcitation of a narrow state N(1670) was investigated and no evidence was found.

45 data tables
Table 1

Measured beam asymmetry at photon energy 724 MeV as a function of the ETA centre of mass angle.

Table 2

Measured beam asymmetry at photon energy 761 MeV as a function of the ETA centre of mass angle.

Table 3

Measured beam asymmetry at photon energy 810 MeV as a function of the ETA centre of mass angle.

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Separated structure functions for the exclusive electroproduction of K+ Lambda and K+ Sigma0 final states.

The CLAS collaboration Ambrozewicz, P. ; Carman, D.S. ; Feuerbach, R.J. ; et al.
Phys.Rev.C 75 (2007) 045203, 2007.
Inspire Record 732363 DOI 10.17182/hepdata.4994

We report measurements of the exclusive electroproduction of $K^+\Lambda$ and $K^+\Sigma^0$ final states from a proton target using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The separated structure functions $\sigma_T$, $\sigma_L$, $\sigma_{TT}$, and $\sigma_{LT}$ were extracted from the $\Phi$- and $\epsilon$-dependent differential cross sections taken with electron beam energies of 2.567, 4.056, and 4.247 GeV. This analysis represents the first $\sigma_L/\sigma_T$ separation with the CLAS detector, and the first measurement of the kaon electroproduction structure functions away from parallel kinematics. The data span a broad range of momentum transfers from $0.5\leq Q^2\leq 2.8$ GeV$^2$ and invariant energy from $1.6\leq W\leq 2.4$ GeV, while spanning nearly the full center-of-mass angular range of the kaon. The separated structure functions reveal clear differences between the production dynamics for the $\Lambda$ and $\Sigma^0$ hyperons. These results provide an unprecedented data sample with which to constrain current and future models for the associated production of strangeness, which will allow for a better understanding of the underlying resonant and non-resonant contributions to hyperon production.

531 data tables
Table 1

Cross sections for incident energy 2.567 GeV for the Q**2 range 0.5 to 0.8 GeV**2 and W range 1.6 to 1.7 GeV.

Table 2

Cross sections for incident energy 2.567 GeV for the Q**2 range 0.5 to 0.8 GeV**2 and W range 1.70 to 1.75 GeV.

Table 3

Cross sections for incident energy 2.567 GeV for the Q**2 range 0.5 to 0.8 GeV**2 and W range 1.75 to 1.80 GeV.

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Polarization in elastic pi- p scattering at 16 momenta between 865 and 2732 mev/c

Albrow, M.G. ; Andersson-Almehed, S. ; Bosnjakovic, B. ; et al.
Nucl.Phys.B 37 (1972) 594-620, 1972.
Inspire Record 75295 DOI 10.17182/hepdata.8091

Polarization distributions and differential cross section data for elastic scattering of negative pions on protons between 865 and 2732 MeV/ c are presented. They are compared with published phase-shift analyses.

48 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Polarization in elastic anti-proton-proton scattering between 0.9 and 2.5 gev/c

Albrow, M.G. ; Andersson-Almehed, S. ; Bosnjakovic, B. ; et al.
Nucl.Phys.B 37 (1972) 349-363, 1972.
Inspire Record 75332 DOI 10.17182/hepdata.32973

Polarization and differential cross-section data are presented for elastic scattering of antiprotons on polarized protons at eight momenta between 0.9 and 2.5 GeV/ c . The data are fitted with a diffraction model.

8 data tables
Table 1

COMBINED 0.88 AND 0.95 GEV/C DATA.

Table 2

COMBINED 1.00 AND 1.04 GEV/C DATA.

Table 3

COMBINED 1.01 AND 1.055 GEV/C DATA.

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Elastic scattering of positive pions on polarized protons between 0.82 and 2.74 gev/c

Albrow, M.G. ; Andersson-Almehed, S. ; Bosnjakovic, B. ; et al.
Nucl.Phys.B 25 (1970) 9-48, 1971.
Inspire Record 68844 DOI 10.17182/hepdata.7102

Polarization and differential cross-section data for elastic scattering of positive pions on protons between 0.82 and 2.74 GeV/ c are presented. A dip in the polarization, at constant u ≈ −0.65 GeV 2 , is observed. The data are compared with published phase-shift analyses.

96 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Asymmetry in the scattering of protons on polarized deuterons at 1.21 gev/c

Albrow, M.G. ; Borghini, M. ; Bosnjakovic, B. ; et al.
Phys.Lett.B 35 (1971) 247-251, 1971.
Inspire Record 69249 DOI 10.17182/hepdata.28476

By using a polarized deuteron target we have measured the asymmetry in the differential cross section for elastic scattering of protons on deuterons and for quasi-elastic scattering of protons on protons bound in deuterons between the two states of opposite polarization, normal to the scattering plane of the initial deuteron. The beam momentum was 1.21 GeV/ c . It is checked that the neutrons bound in the deuterons are polarized to approximately 20%.

2 data tables
Table 1

NOT ALL DATA POINTS COMPILED.

Table 2

Axis error includes +- 10/10 contribution (DS/DT DATA NORMALIZED TO THAT OF VINCENT 70).


Elastic scattering of negative kaons on polarized protons between 865 and 1330 mev/c

Albrow, M.G. ; Andersson-Almehed, S. ; Bosnjakovic, B. ; et al.
Nucl.Phys.B 29 (1971) 413-430, 1971.
Inspire Record 68634 DOI 10.17182/hepdata.33423

Polarization and differential cross-section data for elastic scattering of negative kaons on polarized protons between 865 and 1330 MeV/ c are presented. Comparisons are made with predictions given by published energy dependent phase-shift analyses. The Legendre expansion coefficients characterizing the polarization distributions show remarkable structures resulting from excitation of Λ- and Σ-resonances. An analysis of the elastic and charge-exchange data in this region of momenta supports the assignments of J P = 3 2 + for the Λ(1870) resonance. The occurence of zero crossings in the polarization data is discussed.

8 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Elastic scattering of positive kaons on polarized protons between 0.87 and 2.74 gev/c. results and phase-shift analysis

Albrow, M.G. ; Andersson-Almehed, S. ; Bosnjakovic, B. ; et al.
Nucl.Phys.B 30 (1971) 273-305, 1971.
Inspire Record 68610 DOI 10.17182/hepdata.33401

Polarization and differential cross-section data at 16 momenta between 0.86 and 2.74 GeV/ c are presented. (Preliminary data on some of the momenta have been published earlier.) In an energy-independent phase-shift analysis from threshold up to 2.5 GeV/ c , resonant-like as well as non-resonant solutions are found for the P 3 wave. An helicity flip-non-flip decomposition of the partial waves partly supports the indications found in the analyses of other reactions that the pomeron is built up mainly from s -channel helicity non-flip contributions.

16 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Polarization measurements in medium-energy elastic scattering and high-energy models

Andersson, S. ; Daum, C. ; Erne, F.C. ; et al.
Conf.Proc.C 690905 (1969) 21-49, 1969.
Inspire Record 1091653 DOI 10.17182/hepdata.21876

None

2 data tables
Table 2

'2'. 'N1'. '3'.


Polarization in elastic k-plus p scattering between 0.86 gev/c and 1.45 gev/c - results and phase-shift analysis

Andersson, S. ; Daum, C. ; Erne, F.C. ; et al.
Phys.Lett.B 30 (1969) 56-60, 1969.
Inspire Record 56694 DOI 10.17182/hepdata.28890

Polarization and differential cross-section data at 0.86, 0.97, 1.09, 1.37 and 1.45 GeV c are presented. An energy-independent phase-shift analysis from threshold up to 1.45 GeV c using random searches at 19 momenta and the shortest path method to link solutions at different momenta, yields three solutions. One of these is unlikely; the other two coincide up to 0.86 GeV c , and both show an anticlockwise half-circle in the P 3 -wave.

1 data table
Table 1

No description provided.