McNaughton, M.W.
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THE ENERGY DEPENDENCE OF THE 90-degrees P P ELASTIC SCATTERING DEPOLARIZATION PARAMETER AND AMPLITUDES BETWEEN 0.9-GEV/C AND 1.5-GEV/C

Hollas, C.L. ; Cremans, D.J. ; Ransome, R.D. ; et al.
Phys.Lett.B 143 (1984) 343-346, 1984.
Inspire Record 208375 DOI 10.17182/hepdata.30531

The depolarization parameter D NN for pp elastic scattering at θ cm = 90 ° has been measured at twelve momenta between 0.9 and 1.5 GeV/ c . The moduli of the three transversity amplitudes T 1 , T 3 , and T 4 have been extracted from these data and from previous measurements of the differential cross section and spin correlation parameter A NN (90 °). Smooth energy dependence is found for all three amplitude moduli.

1 data table match query
Table 1

Axis error includes +- 3/3 contribution (DUE TO UNCERTAINTIES IN THE TARGET ANALYSING POWER).


PROTON DEUTERON ELASTIC SCATTERING AT 800-MeV

Winkelmann, E. ; Bevington, P.R. ; Mcnaughton, M.W. ; et al.
Phys.Rev.C 21 (1980) 2535-2541, 1980.
Inspire Record 158610 DOI 10.17182/hepdata.26340

Differential cross sections and polarization analyzing powers for proton-deuteron elastic scattering have been measured at 800 MeV incident proton kinetic energy over the range of center-of-mass angles from 14.1° to 153.6°. The differential cross sections are described by the Glauber theory of impulse approximation at forward angles (−t<0.5) and exhibit the exponential dependence on cosθc.m. typical for these energies at backward angles (cosθc.m.<−0.5). The analyzing power shows considerable structure with strong positive peaks at forward and backward angles and a sharp dip at t=−0.4 typical at intermediate energies. There is no evidence for correspondence of the angular dependence of the analyzing power with that for the pp→dπ+ reaction. At large momentum transfer the data favor calculations based on multiple scattering with a modified deuteron form factor rather than N* exchange. NUCLEAR REACTIONS H2(p,p)H2, E=800 MeV, measured σ(θ) and Ay(θ).

1 data table match query
Table 1

No description provided.


Neutron-Proton Differential-Cross-Section Measurements at 50 MeV

Montgomery, T.C. ; Brady, F.P. ; Bonner, B.E. ; et al.
Phys.Rev.Lett. 31 (1973) 640-643, 1973.
Inspire Record 945159 DOI 10.17182/hepdata.21337

The neutron-proton differential cross section at 50.0 MeV has been measured to a precision of ≃ 2% for backward-hemisphere c.m. angles and ≃ 3% for forward angles, both relative. The present data are not in good agreement with the previous n−p measurements near this energy. A preliminary phase-shift analysis using the present data produces more satisfactory results, particularly for the P11 phase shift.

2 data tables match query
Table 1

No description provided.

Table 2

No description provided.


SPIN DEPENDENCE IN NEUTRON PROTON CHARGE EXCHANGE AT 790-MEV

Ransome, R.D. ; Hollas, C.L. ; Riley, P.J. ; et al.
Phys.Rev.Lett. 48 (1982) 781-784, 1982.
Inspire Record 180615 DOI 10.17182/hepdata.20595

The analyzing power A and spin-transfer parameters KNN, KSS, KSL, and KLL have been measured in the np charge-exchange (np→pn) region at 790 MeV. These data provide new and unique information on the spin dependence of the np interaction in the charge-exchange region. Models which explain the charge-exchange peak in the np elastic differential cross section as being due to interference between one-pion exchange and a slowly varying background are in basic agreement with the data.

3 data tables match query
Table 1

No description provided.

Table 2

No description provided.

Table 3

USING PHASE-SHIFT VALUES FOR KLS AND KSL.


Polarization Analyzing Power Ay (theta) in pp Elastic Scattering at 643, 787, and 796 MeV

Bevington, P.R. ; McNaughton, M.W. ; Willard, H.B. ; et al.
Phys.Rev.Lett. 41 (1978) 384-387, 1978.
Inspire Record 139918 DOI 10.17182/hepdata.20830

Data have been obtained for the polarization analyzing power Ay(θ) in pp elastic scattering from near 30° to 90° (c.m.) at 643, 787, and 796 MeV. Relative uncertainties are typically ± 0.003 with an overall normalization uncertainty of {+1}{−0.5}%. Data are not consistent with existing phase-shift analyses.

3 data tables match query
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Absolute p p elastic cross-sections from 492-MeV to 793-MeV using CH-2 targets

Simon, A.J. ; Glass, G. ; McNaughton, M.W. ; et al.
Phys.Rev.C 53 (1996) 30-34, 1996.
Inspire Record 429629 DOI 10.17182/hepdata.25831

pp-elastic differential cross sections are reported at 492 MeV from 40° to 90°, and at 576, 642, 728, and 793 MeV from 75° to 90° c.m., with an absolute accuracy of less than 1%. These data, obtained with polyethylene targets, agree with recent measurements at the same energies obtained with a liquid-hydrogen target. © 1996 The American Physical Society.

10 data tables match query
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Absolute differential cross-section measurements for proton deuteron elastic scattering at 641.3-MeV and 792.7-MeV

Guelmez, E. ; Beedoe, S. ; Jaroszewicz, T. ; et al.
Phys.Rev.C 43 (1991) 2067-2076, 1991.
Inspire Record 323100 DOI 10.17182/hepdata.26113

The absolute p-d elastic-scattering differential cross sections were measured at 641.3 and 792.7 MeV beam energies over a range of c.m. angles from ∼35° to ∼115° and ∼35° to ∼140°, respectively. The longitudinally polarized (L-type) proton beam produced by the Lamb-shift ion source at LAMPF was used. The beam intensity was measured to high accuracy (∼0.1%) by a scintillator-beam particle-counting system designed and developed prior to the experiment. Typical uncertainties in the absolute cross sections were about 2–3% total, somewhat larger at back angles. The present results were compared with the existing measurements and the controversy about the previous data at 800 MeV was resolved. The present data can be fit with a relativistic multiple-scattering theory which uses off-mass-shell extrapolations of the nucleon-nucleon amplitudes suggested by the structure of derivative meson-nucleon couplings. Relativistic-impulse-approximation calculations do not fit these data at either energy.

6 data tables match query
Table 1

TARGET IS A LIQUID DEUTERIUM. THE LABORATORY ANGLES BIN SIZES ARE 30 MRAD AT FORWARD ANGLES AND 50 MRAD AT OTHER ANGLES.

Table 2

TARGET IS A LIQUID DEUTERIUM. THE DATA IN THIS TABLE ARE THE SAME AS IN THE TABLE 1, BUT IN THE ANOTHER REPRESENTATION.

Table 3

TARGET IS A LIQUID DEUTERIUM. THE DATA IN THIS TABLE ARE THE SAME AS IN THE TABLE 1, BUT IN THE ANOTHER REPRESENTATION.

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Absolute p p elastic cross-sections from 492-MeV to 793-MeV

Simon, A.J. ; Glass, G. ; McNaughton, M.W. ; et al.
Phys.Rev.C 48 (1993) 662-675, 1993.
Inspire Record 363783 DOI 10.17182/hepdata.26001

Absolute pp-elastic-differential cross sections were measured at incident energies 492, 576, 642, 728, and 793 MeV from about 30° to 90° c.m. The total uncertainty was determined to be less than 1%, made possible by particle counting for beam normalization and extensive cross-checks of systematic effects. These new data are consistent with previous data above 600 MeV but have uncertainties about a factor of 10 smaller. Near 500 MeV these data are consistent with 90° data from TRIUMF, but differ significantly from similar data from PSI; the cause of this discrepancy is discussed.

5 data tables match query
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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n p elastic spin transfer measurements at 485-MeV and 635-MeV

McNaughton, K.H. ; Ambrose, D.A. ; Coffey, P. ; et al.
Phys.Rev.C 46 (1992) 47-51, 1992.
Inspire Record 342389 DOI 10.17182/hepdata.26097

We have measured the spin-transfer parameters KLL, KSL, KLS, and KSS at 635 MeV from 50° to 178° c.m. and at 485 MeV from 74° to 176° c.m. These new data have a significant impact on the phase-shift analyses. There are now sufficient data near these energies to overdetermine the elastic nucleon-nucleon amplitudes.

2 data tables match query
Table 1

Spin transfer parameters from np elastic scattering at 635 MeV. There is an additional overall normalisation of 2 PCT.

Table 2

Spin transfer parameters from np elastic scattering at 485 MeV. There is an additional overall normalisation of 2 PCT.


n p elastic analyzing power A(NO) and spin transfer K(NN)

McNaughton, M.W. ; Johnston, K. ; Swenson, D. ; et al.
Phys.Rev.C 48 (1993) 256-265, 1993.
Inspire Record 34401 DOI 10.17182/hepdata.51045

We have measured the analyzing power ANO and the spin transfer KNN for np-elastic scattering from about 60° to 170° c.m. at 485, 635, and 788 MeV. The new data clarify previous discrepancies and complete the first-order determination of nucleon-nucleon elastic scattering at these energies.

6 data tables match query
Table 1

For definition of the POL(NAME=SPIN-TRANSFER) see text.

Table 2

For definition of the POL(NAME=SPIN-TRANSFER) see text.

Table 3

For definition of the POL(NAME=SPIN-TRANSFER) see text.

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