HEPData Search

The polarization of the recoil proton has been measured in both high-energy elastic and inclusive proton-proton scattering at the internal-target area of Fermi National Accelerator Laboratory. The polarization in elastic scattering was measured at a number of center-of-mass energies up to s=19.7 GeV. Indications of negative polarization were seen at the higher center-of-mass energies for t values of -0.6, -0.8, and -1.0 (GeV/c)2. In the inclusive process p+p→p↑+X the polarization was found to be independent of beam energy from 100 to 400 GeV for xF values of -0.7, -0.8, -0.9. The polarization at PT=1.0 GeV/c, xF=−0.7 and xF=−0.8 was less than 2.5%. This is significantly lower than the corresponding measurements reported for Λ0 inclusive polarization.

10 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

EXCLUSIVE ANNIHILATION PROCESSES IN 8.8-GEV ANTI-P P INTERACTIONS AND COMPARISONS BETWEEN ANTI-P P NONANNIHILATIONS AND P P INTERACTIONS

Ward, D.R. ; Simmons, A.J. ; Ansorge, R.E. ; et al.

Nucl.Phys.B 172 (1980) 302, 1980.

Inspire Record 158992 DOI 10.17182/hepdata.34487

We give cross sections for annihilation and non-annihilation reactions in p p interactions at 8.8 GeV. The non-annihilation data are compared with pp data from the same experiment. We compare data on resonance production and on the impact parameter structure of the final states in p p annihilation and non-annihilation and pp interactions. We investigate the charge structure of the 2 π + 2 π − π 0 final state, and find it consistent with a simple quark model.

4 data tables

Table 1

NORMALIZED TO A TOTAL AP P CROSS SECTION OF 55.9 MB. ANNIHILATION CROSS SECTIONS.

Table 2

NORMALIZED TO A TOTAL AP P CROSS SECTION OF 55.9 MB. NON-ANNIHILATION CROSS SECTIONS.

Table 3

NORMALIZED TO A TOTAL P P CROSS SECTION OF 40.0 MB.

More…

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).

More…

The Normalization of p p Polarization Between 200-MeV and 520-MeV

Amsler, C. ; Bugg, D.V. ; Axen, D. ; et al.

J.Phys.G 4 (1978) 1047-1053, 1978.

Inspire Record 135489 DOI 10.17182/hepdata.38559

The absolute normalisation of the polarisation in pp elastic scattering at 24 degrees lab has been determined by means of a double-scattering experiment to an accuracy of +or-1.5% at five energies between 200 and 520 MeV.

1 data table

Table 1

No description provided.

Proton Proton Elastic Scattering from 150-MeV to 515-MeV

Bugg, D.V. ; Edgington, J.A. ; Amsler, Claude ; et al.

J.Phys.G 4 (1978) 1025, 1978.

Inspire Record 123232 DOI 10.17182/hepdata.38563

The parameters D, R, R' and P for pp elastic scattering have been measured in the centre-of-mass angular range 13 degrees to 58 degrees with an accuracy of about +or-0.02 at 209, 324, 379, 425 and 515 MeV. These results are incorporated with earlier data into a phase-shift analysis. Phase-shifts are generally in agreement with the theoretical predictions of the Paris group, although the F-wave spin-orbit combination is rather stronger than predicted. The fitted value for the pi 0pp coupling constant in g02=14.06+or-0.65.

6 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

d, r, r-prime and p in p p Elastic Scattering from 209-MeV to 515-MeV

Axen, D. ; Felawka, L. ; Jaccard, S. ; et al.

Lett.Nuovo Cim. 20 (1977) 151-156, 1977.

Inspire Record 125649 DOI 10.17182/hepdata.37405

None

5 data tables

Table 1

POLARIZATION PARAMETER P(N000).

Table 2

POLARIZATION PARAMETER A(00N0).

Table 3

WOLFENSTEIN PARAMETER D(N0N0).

More…

$\pi^{\pm} p$, $K^{\pm} p$, $pp$ and $p\bar{p}$ Elastic Scattering from 50-GeV/c to 175-GeV/c

The Fermilab Single Arm Spectrometer Group collaboration Ayres, D.S. ; Diebold, R. ; Maclay, G.J. ; et al.

Phys.Rev.D 15 (1977) 3105, 1977.

Inspire Record 110409 DOI 10.17182/hepdata.24653

The differential cross sections for the elastic scattering of π+, π−, K+, K−, p, and p¯ on protons have been measured in the t interval -0.04 to -0.75 GeV2 at five momenta: 50, 70, 100, 140, and 175 GeV/c. The t distributions have been parametrized by the quadratic exponential form dσdt=Aexp(B|t|+C|t|2) and the energy dependence has been described in terms of a single-pole Regge model. The pp and K+p diffraction peaks are found to shrink with α′∼0.20 and ∼0.15 GeV−2, respectively. The p¯p diffraction peak is antishrinking while π±p and K−p are relatively energy-independent. Total elastic cross sections are calculated by integrating the differential cross sections. The rapid decline in σel observed at low energies has stopped and all six reactions approach relatively constant values of σel. The ratio of σelσtot approaches a constant value for all six reactions by 100 GeV, consistent with the predictions of the geometric-scaling hypothesis. This ratio is ∼0.18 for pp and p¯p, and ∼0.12-0.14 for π±p and K±p. A crossover is observed between K+p and K−p scattering at |t|∼0.19 GeV2, and between pp and p¯p at |t|∼0.11 GeV2. Inversion of the cross sections into impact-parameter space shows that protons are quite transparent to mesons even in head-on collisions. The probability for a meson to pass through a proton head-on without interaction inelastically is ∼20% while it is only ∼6% for an incident proton or antiproton. Finally, the results are compared with various quark-model predictions.

31 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Elastic Scattering Crossovers from 50-GeV to 175-GeV

The Fermilab Single Arm Spectrometer Group collaboration Anderson, R.L. ; Anelli, E.F. ; Ayres, D.S. ; et al.

Phys.Rev.Lett. 37 (1976) 1025, 1976.

Inspire Record 108810 DOI 10.17182/hepdata.21092

A comparison of K±p and p±p elastic scattering is made for incident energy 50 to 175 GeV. Average values of 0.19±0.04 and 0.11±0.02 GeV2 were found for the invariant-momentum-transfer values of the Kp and pp crossover points, respectively.

1 data table

Table 1

KP AND PP CROSSOVER POINTS AT -T = 0.19 +- 0.04 AND 0.11 +- 0.02 GEV**2 (AVERAGE VALUES) RESPECTIVELY.

Date

Collaboration

Subject_areas

Phrases

Reactions Reset

Observables

CM Energies (GeV)

Authors Reset

Elastic $p p$ Scattering in the Coulomb Nuclear Interference Region in (500-{MeV} to 1000-{MeV}) Range

MEASUREMENT OF P P ELASTIC SCATTERING DIFFRACTION SLOPE PARAMETER IN REGION OF 650-MEV - 1000-MEV. (IN RUSSIAN)

Proton Polarization in $p p$ Elastic and Inclusive Processes at Beam Momenta From 20-{GeV}/$c$ to 400-{GeV}/$c$

EXCLUSIVE ANNIHILATION PROCESSES IN 8.8-GEV ANTI-P P INTERACTIONS AND COMPARISONS BETWEEN ANTI-P P NONANNIHILATIONS AND P P INTERACTIONS

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

The Normalization of p p Polarization Between 200-MeV and 520-MeV

Proton Proton Elastic Scattering from 150-MeV to 515-MeV

d, r, r-prime and p in p p Elastic Scattering from 209-MeV to 515-MeV

$\pi^{\pm} p$, $K^{\pm} p$, $pp$ and $p\bar{p}$ Elastic Scattering from 50-GeV/c to 175-GeV/c

Elastic Scattering Crossovers from 50-GeV to 175-GeV