Franklin, G.
Spin Correlation
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Spin transfer measurements of the pi d (polarized) ---> p p (polarized) reaction spanning the Delta resonance

Feltham, A. ; Trelle, R.P. ; Jones, G. ; et al.
Phys.Rev.Lett. 66 (1991) 2573-2576, 1991.
Inspire Record 315151 DOI 10.17182/hepdata.19906

The first spin-transfer observables for the πd→pp reaction have been measured at a number of energies spanning the Δ resonance in this system. These parameters correspond to KSL and KSS of the pp→dπ reaction for incident proton energies ranging from 600 to 800 MeV. Such data can provide an important constraint on the determination of the partial-wave amplitudes describing this fundamental reaction. The discrepancies between our data, theoretical predictions, and values calculated from published partial-wave amplitudes demonstrate the need for further work in this area.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


The Spin Correlation Parameter and Analyzing Power in $n p$ Elastic Scattering at Intermediate-energies

Abegg, R. ; Ahmad, M. ; Bandyopadhyay, D. ; et al.
Phys.Rev.C 40 (1989) 2684-2696, 1989.
Inspire Record 281880 DOI 10.17182/hepdata.26220

In order to improve existing I=0 phase shift solutions, the spin correlation parameter ANN and the analyzing powers A0N and AN0 have been measured in n-p elastic scattering over an angular range of 50°–150° (c.m.) at three neutron energies (220, 325, and 425 MeV) to an absolute accuracy of ±0.03. The data have a profound effect on various phase parameters, particularly the P11, D23, and ε1 phase parameters which in some cases change by almost a degree. With the exception of the highest energy, the data support the predictions of the latest version of the Bonn potential. Also, the analyzing power data (A0N and AN0) measured at 477 MeV in a different experiment over a limited angular range [60°–80° (c.m.)] are reported here.

10 data tables
Table 1

The beam analysing power at incident kinetic energy 220 MeV. Additional systematic uncertainty of +- 0.015 and a scalar error of 3.5 PCT.

Table 2

The beam analysing power at incident kinetic energy 325 MeV. Additional systematic uncertainty of +- 0.018 and a scalar error of 3.1 PCT.

Table 3

The beam analysing power at incident kinetic energy 425 MeV. Additional systematic uncertainty of +- 0.022 and a scalar error of 3.3 PCT.

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An investigation of the spin structure of the proton in deep inelastic scattering of polarized muons on polarized protons.

The European Muon collaboration Ashman, J. ; Badelek, B. ; Baum, Guenter ; et al.
Nucl.Phys.B 328 (1989) 1, 1989.
Inspire Record 280143 DOI 10.17182/hepdata.49587

The spin asymmetry in deep inelastic scattering of longitudinally polarised muons by longitudinally polarised protons has been measured in the range 0.01<×<0.7. The spin dependent structure function g 1 ( x ) for the proton has been determined and, combining the data with earlier SLAC measurements, its integral over x found to be 0.126±0.010(stat.)±0.015(syst.), in disagreement with the Ellis-Jaffe sum rule. Assuming the validity of the Biorken sum rule, this result implies a significant negative value for the integral of g 1 for the neutron. These integrals lead to the conclusion, in the naïve quark parton model, that the total quark spin constitutes a rather small fraction of the spin of the nucleon. Results are also presented on the asymmetries in inclusive hadron production which are consistent with the above picture.

7 data tables
Table 1

THE MEAN Q**2 FOR EACH OF THE 10 VALUES OF X BELOW ARE 3.5,4.5,6.0, 8.010.3,12.9,15.2,18.0,22.5,29.5.

Table 2

No description provided.

Table 3

No description provided.

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Measurement of a Mixed Spin Spin Correlation Parameter for $n p$ Elastic Scattering

Garnett, R. ; Rawool, M. ; Carlson, V. ; et al.
Phys.Rev.D 40 (1989) 1708, 1989.
Inspire Record 25430 DOI 10.17182/hepdata.23054

The mixed spin-spin correlation parameter Cσσ≈0.5CSS−0.8CSL for np elastic scattering was measured for incident-neutron-beam kinetic energies of 484, 634, and 788 MeV over the center-of-mass angular range 75°-180°. These Cσσ data are important for determining the I=0 nucleon-nucleon amplitudes and provide strong constraints on the phase-shift solutions. It was found that the P11, S13, and D13 isospin-0 partial waves are most strongly affected.

3 data tables
Table 1

Mixed spin parameter POL.POL(NAME=CXX) is given by 0.475 * CSS + 0.088 CNN + 0.1390 CLL - 0.744 CSL.

Table 2

Mixed spin parameter POL.POL(NAME=CXX) is given by 0.506 * CSS + 0.064 CNN + 0.163 CLL - 0.809 CSL.

Table 3

Mixed spin parameter POL.POL(NAME=CXX) is given by 0.528 * CSS + 0.050 CNN + 0.178 CLL - 0.824 CSL.


Spin Correlation Parameter A(nn) ($\theta^*$) for $n p$ Elastic Scattering at 790-{MeV}

Nath, S. ; Glass, G. ; Hiebert, J.C. ; et al.
Phys.Rev.D 39 (1989) 3520, 1989.
Inspire Record 25429 DOI 10.17182/hepdata.23226

The spin-correlation parameter Ann for free n-p elastic scattering has been measured for the first time for incident-neutron-beam energy En=790 MeV and c.m. angles 48°≤θ*≤149°. The data are compared with the widely differing predictions of several phase-shift analyses, clearly favoring one of them. They also are compared with recently published quasifree Ann data for the more limited c.m. angular region 98°≲θ*≲122°.

1 data table
Table 1

No description provided.


Measurement of Spin Effects in $p$ (Polarized) $p$ (Polarized) $\to p p$ at 18.5-{GeV}/$c$

Crabb, D.G. ; Gialas, I. ; Krisch, A.D. ; et al.
Phys.Rev.Lett. 60 (1988) 2351, 1988.
Inspire Record 261135 DOI 10.17182/hepdata.20096

We measured the analyzing power A and the spin-spin correlation parameter Ann in medium-P⊥2 proton-proton elastic scattering, using a polarized-proton target and the 18.5-GeV/c Brookhaven Alternating-Gradient Synchrotron polarized-proton beam. We found sharp dips in both A and Ann, which occur at different P⊥2 values. The unexpected sharp structure in the spin-spin force occurs near P⊥2=2.3 (GeV/c)2 where the elastic cross section has no apparent structure.

1 data table
Table 1

Errors contain both statistics and systematics.


Measurement of the Spin Correlation A(ookk) in $N P$ Elastic Scattering Between 0.63-{GeV} and 1.08-{GeV}

Ball, J. ; Lac, C.D. ; Lehar, F. ; et al.
Z.Phys.C 40 (1988) 193-197, 1988.
Inspire Record 269772 DOI 10.17182/hepdata.15598

We present the measurements of the spin correlation parameterAookk(np). A longitudinally polarized beam of free neutrons obtained from the break-up of polarized deuterons was scattered on the longitudinally polarized Saclay frozen-spin proton target. Measurements were carried out at SATURNE II, at neutron beam kinetic energies of 0.63, 0.88, 0.98 and 1.08 GeV. The data points cover the angular region from about 40° to 110° CM. The observed angular dependence ofAookk(np) at 0.63 GeV agree with the phase shift analysis predictions except at small angles.

4 data tables
Table 1

First set of data is with neutron counter hodoscope. Second is using a charge-exchange in the carbon block.

Table 2

No description provided.

Table 3

No description provided.

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A(ll) at Small Momentum Transfers for the First Complete Determination of the Forward $p p$ Scattering Amplitude

Pauletta, G. ; Gazzaly, M. ; Tanaka, N. ; et al.
Phys.Lett.B 211 (1988) 19-23, 1988.
Inspire Record 252973 DOI 10.17182/hepdata.29911

The asymmetry A LL for pp elastic scattering has been measured at 650 and 800 MeV in the region of Coulomb-nuclear interference. The real part of the double-spin-flip amplitude extracted from these data completes our determination of the forward pp scattering amplitudes at these energies. Comparison with the predictions of forward dispersion relations reveals a discrepancy in the spin-dependent channels at 650 MeV.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Measurement of C(ll) and C(sl) in $N P$ Elastic Scattering at 484-{MeV} and 634-{MeV}

Burleson, G.R. ; Faucett, J.A. ; Fontenla, C.A. ; et al.
Phys.Rev.Lett. 59 (1987) 1645, 1987.
Inspire Record 21907 DOI 10.17182/hepdata.3247

The spin-spin correlation parameters CLL=(L,L;0,0)=ALL and CSL=(S,L;0,0)=ASL for np elastic scattering were measured for incident polarized-neutron–beam kinetic energies of 484 and 634 MeV over the center-of-mass angles from ≃80° to 180°. The data are important for determining the I=0 nucleon-nucleon amplitudes. These results are compared with phase-shift calculations.

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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First Measurement of the Real Part of a $p p$ Double Spin Flip Amplitude

Gazzaly, M.M. ; Pauletta, G. ; Tanaka, N. ; et al.
Phys.Rev.Lett. 58 (1987) 1084, 1987.
Inspire Record 247888 DOI 10.17182/hepdata.20181

The asymmetry ANN for pp elastic scattering has been measured at 800 and 650 MeV in the region of Coulomb-nuclear interference. The data have been analyzed to extract the real part of a spin-spin scattering amplitude. Results are compared with the predictions of forward dispersion relations. They disagree significantly at 650 MeV.

2 data tables
Table 1

No description provided.

Table 2

No description provided.