scholarly journals Measurement of the differences in the total cross section for antiparallel and parallel longitudinal spins and a measurement of parity nonconservation with incident polarized protons and antiprotons at 200 GeV/c

1997 ◽  
Vol 55 (3) ◽  
pp. 1159-1187 ◽  
Author(s):  
D. P. Grosnick ◽  
D. A. Hill ◽  
T. Kasprzyk ◽  
D. Lopiano ◽  
Y. Ohashi ◽  
...  
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Parity Nonconservation ◽  
Polarized Protons ◽  
200 Gev

scholarly journals Parity nonconservation in proton scattering at higher energies

1988 ◽  
Vol 66 (6) ◽  
pp. 495-502 ◽  
Author(s):  
R. E. Mischke
Keyword(s):  
Total Cross Section ◽  
Systematic Error ◽  
Energy Dependence ◽  
Cross Section ◽  
Parity Nonconservation ◽  
Proton Scattering ◽  
Incident Proton ◽  
Polarized Protons

Parity-nonconservation experiments in the scattering of longitudinally polarized protons at incident proton momenta of 1.5 and 6 GeV/c are examined. These experiments indicate a change with energy of the total cross section correlated with proton helicity that was unexpected. This energy dependence is due to the strong part of the interaction and may indicate the role of a diquark component in the nucleon. New experiments at higher energies are needed to confirm such a model. Future experiments can benefit from an analysis of sources of systematic error that have been encountered in the experiments discussed here.

THE SPIN CONTRIBUTION TO THE pp-TOTAL CROSS-SECTION AT HIGH ENERGY

1998 ◽  
Vol 13 (09) ◽  
pp. 1515-1522 ◽  
Author(s):  
E. A. ANDREEVA ◽  
M. N. STRIKHANOV ◽  
S. B. NURUSHEV
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Cross Sections ◽  
High Energy ◽  
Spin Projection ◽  
Total Cross Sections ◽  
Spin Effects ◽  
Dependent Term ◽  
Spin Interactions ◽  
200 Gev

The experimental data on the pp-total cross-sections including the spin-dependent parts are analyzed with the goal to determine the contribution of spin interactions at high energies. Based on the Regge model with cuts, the energy dependencies of such contributions are estimated for two spin-dependent terms: (1) the total spin dependent term, σ1 and (2) the spin projection dependent term, σ2. The estimates show that their contributions to the unpolarized total cross section, σ0, decrease with energy from several % around 2 GeV/c to 10-2% around 200 GeV/c. The assumption σ1= -σ2 does not seem to be correct, while the hypothesis 3 σ1=-σ2 is more preferable, especially in the measured energy interval 2-6 GeV. There is a clear indication that the spin effects are sensitive to the pomeron intercept at - t=0 (GeV/c)2. In order to pin down such effects the spin dependent total cross-sections must be measured with precisions better than 10 μb at 200 GeV/c.

Measurement of Parity Nonconservation in the Proton-Proton Total Cross Section at 800 MeV

1986 ◽  
Vol 57 (14) ◽  
pp. 1680-1683 ◽  
Author(s):  
V. Yuan ◽  
H. Frauenfelder ◽  
R. W. Harper ◽  
J. D. Bowman ◽  
R. Carlini ◽  
...  
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Parity Nonconservation ◽  
Proton Proton

Measurements of the total cross section differenceΔσ Т innp transmission between 0.86 and 0.94 GeV

1994 ◽  
Vol 61 (1) ◽  
pp. 53-57 ◽  
Author(s):  
J. Ball ◽  
L. S. Barabash ◽  
R. Binz ◽  
J. Bystricky ◽  
Ph. Chesny ◽  
...  
Keyword(s):  
Total Cross Section ◽  
Cross Section
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