Spin Correlation
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MEASUREMENT OF TWO AND THREE SPIN PARAMETERS AT 6-GEV/C USING A TRANSVERSELY POLARIZED BEAM AND TARGET

Beretvas, A. ; Miller, D. ; Auer, I.P. ; et al.
Phys.Rev.D 20 (1979) 21-32, 1979.
Inspire Record 146770 DOI 10.17182/hepdata.24227

Toward the goal of experimentally determining pp elastic scattering amplitudes at 6 GeV/c, we have measured a linear combination of triple-spin correlation parameters and also a linear combination of spintransfer parameters over the |t| range between 0.2 and 1.0 (GeV/c)2. A horizontally polarized beam (S direction) was obtained by precessing the spin of the polarized beam from the Argonne Zero Gradient Synchrotron using a superconducting solenoid. The target protons were polarized vertically (N direction) and the polarization of the recoil protons was measured with a carbon polarimeter. The results are consistent with the amplitude corresponding to π exchange being almost real and positive.

1 data table
Table 1

KSS = (S00S) AND HSNS = (SN0S) MEASURED HERE CONTAIN SMALL ADMIXTURES OF THE OTHER SPIN-TRANSFER AND TRIPLE-SPIN CORRELATION PARAMETERS RESPECTIVELY DUE TO THE POLARIZED TARGET MAGNETIC FIELD - SEE TEXT. MEAN VALUE OF HSNS OVER THIS T-RANGE IS 0.098 +- 0.085. PARITY CONSERVATION REQUIRES THE VANISHING OF THE PARAMETERS KSN, HSNN, (000S) AND DNS, WHILE (000N) MUST AGREE WITH THE SINGLE SCATTERING POLARIZATION PARAMETER (0N00).


Measurements of the Double Polarization Parameters $G$ and $H$ in Neutral Pion Photoproduction

Bussey, P.J. ; Rutherglen, J.G. ; Booth, P.S.L. ; et al.
Nucl.Phys.B 159 (1979) 383-396, 1979.
Inspire Record 141663 DOI 10.17182/hepdata.34624

Measurements have been made of the double polarisation parameters G and H in the photoproduction of neutral pions from protons, for incident photon energies between 1300 MeV and 2300 MeV and for pion c.m. angles between 50δ and 80δ. The results are compared with predictions from a recent comprehensive analysis of earlier photoproduction data.

11 data tables
Table 1

No description provided.

Table 2

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Table 3

No description provided.

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Spin Spin Forces in 6-{GeV}/$c$ Neutron - Proton Elastic Scattering

Crabb, D.G. ; Hansen, P.H. ; Krisch, A.D. ; et al.
Phys.Rev.Lett. 43 (1979) 983, 1979.
Inspire Record 141922 DOI 10.17182/hepdata.20753

Measurement was made of dσdt for n↑+p↑→n+p at P⊥2=0.8 and 1.0 (GeV/c)2 at 6 GeV/c. The 6-GeV/c 53%-polarized neutrons from the 12-GeV/c polarized deuteron beam at the Argonne zero-gradient synchroton were scattered from our 75%-polarized proton target. Both spins were oriented perpendicular to the scattering plane. We found large unexpected spin-spin effects in n−p elastic scattering which are quite different from the p−p spin-spin effects.

1 data table
Table 1

No description provided.


MEASUREMENT OF THE SPIN DEPENDENT PARAMETERS D, R, A, AND P FOR SMALL ANGLE P P ELASTIC SCATTERING BETWEEN 300-MeV AND 600-MeV

Besset, D. ; Do, Q.H. ; Favier, B. ; et al.
Phys.Rev.D 21 (1980) 580-598, 1980.
Inspire Record 157432 DOI 10.17182/hepdata.24184

The Wolfenstein parameters D, R, and A and the polarization parameter P have been measured for p−p elastic scattering at 312, 392, 493, and 575 MeV kinetic energy. The center-of-mass angular range observed was from 3° to 33°. The experiment was performed at SIN, using a polarized proton beam. These data significantly improve the determination of I=1 phase shifts.

4 data tables
Table 1

No description provided.

Table 2

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Table 3

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Measurement of the Spin Correlation Parameters a(00kk), a(00ks) and a(00ss) in the p p Elastic Scattering Between 400-MeV and 600-MeV

Aprile, E. ; Hausammann, R. ; Heer, E. ; et al.
Phys.Rev.D 28 (1983) 21-39, 1983.
Inspire Record 162345 DOI 10.17182/hepdata.23773

We have measured the spin-correlation parameters A00kk, A00ks, and A00ss in p−p scattering between 400 and 600 MeV using a longitudinally polarized beam and a butanol target polarized in the horizontal plane. Owing to the restrictive geometrical acceptance of the target, the polarization axis of the target was oriented at an angle α with respect to beam direction. The parameters A00kk and A00ks were therefore measured as a linear combination at 577, 536, 514, 494, and 445 MeV. These experiments were extended to the measurement of A00ks and A00ss by using a transversely polarized beam. We present the results, which are compared with phase-shift predictions.

5 data tables
Table 1

No description provided.

Table 2

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Table 3

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MEASUREMENT OF THE POLARIZATION ROTATION COEFFICIENT A IN THE P P SCATTERING AT 970-MEV. (IN RUSSIAN)

Vovchenko, V.G. ; Gorodnitsky, G.A. ; Zhdanov, A.A. ; et al.
Yad.Fiz. 32 (1980) 164-173, 1980.
Inspire Record 159796 DOI 10.17182/hepdata.18824

None

4 data tables
Table 1

Axis error includes +- 5/5 contribution (DUE TO ANALYZING POWER UNCERTAINTY).

Table 2

Axis error includes +- 5/5 contribution (DUE TO ANALYZING POWER UNCERTAINTY).

Table 3

Axis error includes +- 5/5 contribution (DUE TO ANALYZING POWER UNCERTAINTY).

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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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POLARIZATION OF RECOIL PROTONS FROM THE REACTION GAMMA P ---> PI0 P IN THE PHOTON ENERGY RANGE 450-MEV - 800-MEV

Bratashevsky, A.S. ; Gorbenko, V.G. ; Derebchinsky, A.I. ; et al.
Nucl.Phys.B 166 (1980) 525-533, 1980.
Inspire Record 157933 DOI 10.17182/hepdata.34552

Measurement of secondary-proton polarization from the reaction γ p → π 0 p have been performed in the proton energy range 500–800 MeV at c.m. pion emission angles 100°, 120°, 140°. The experiment was carried out using an optical spark chamber telescope at the output of the magnetic spectrometer. The obtained experimental data are included in a Walker-type analysis in order to verify the parameters of the resonances P 11 (1470), D 13 (1570) and S 11 (1535). Proton polarization in the reaction γ p → π 0 p was measured for a photon energy of 450 MeV at a c.m. pion emission angle of 105° using photons linearly polarized at 45° to the reaction plane. A liquid hydrogen target in the field of a superconducting magnet was used for the separation of the P x ′ and P z ′ components of the secondary-proton polarization vector.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

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MEASUREMENT OF DEPOLARIZATION PARAMETERS D IN CHARGE EXCHANGE n p SCATTERING AT 600-MeV

Bagaturiya, Yu.Sh. ; Kazarinov, Yu.M. ; Kazarinov, M.Yu. ; et al.
Sov.J.Nucl.Phys. 33 (1981) 659, 1981.
Inspire Record 160829 DOI 10.17182/hepdata.9878

None

4 data tables
Table 1

DATA AVERAGED FOR TWO DIRECTIONS OF TARGET POLARIZATION.

Table 2

No description provided.

Table 3

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DEPOLARIZATION PARAMETER IN P P INCLUSIVE SCATTERING AT 6-GEV/C

Courant, H. ; Kagan, H. ; Makdisi, Y. ; et al.
Phys.Rev.Lett. 44 (1980) 1373-1376, 1980.
Inspire Record 158285 DOI 10.17182/hepdata.20737

The depolarization parameter for pp inclusive scattering at an incident momentum of 6 GeV/c was measured. The D parameter for inclusive scattering indicates the dominance of natural-parity exchange at small t, except in the case of N*(1232) production, where π exchange is more important. D for elastic scattering has also been measured. This parameter shows a small decrease from unity with increasing momentum transfer.

3 data tables
Table 1

No description provided.

Table 2

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Table 3

No description provided.