Anderson, R.L.
SLOPE
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STUDY OF THE REACTION P (polarized) P ---> N DELTA++ AT 6-GEV/C WITH POLARIZED BEAM

Eisner, R.L. ; Fickinger, W.J. ; Malko, J.A. ; et al.
Phys.Rev.D 20 (1979) 596-600, 1979.
Inspire Record 146629 DOI 10.17182/hepdata.24197

We have studied the reaction p↑p→nΔ++ at 6 GeV/c incident momentum in which the incident protons are 60% transversely polarized. The experiment used the Argonne National Laboratory Zero Gradient Synchrotron polarized beam and the 12-foot hydrogen bubble chamber. We report on about 6000 Δ++ events, with the Δ++ produced in the backward hemisphere in the c.m. system. Spin-density matrix elements as a function of momentum transfer are presented and small beam-polarization-induced effects are described.

4 data tables
Table 1

BACKWARD-PRODUCED DEL++ HAS HALF THIS CROSS SECTION.

Table 2

TWO EXPONENTIAL FITS: D(SIG)/DT HAS CHANGE OF SLOPE AT ABOUT -T OF 0.1 GEV**2.

Table 3

No description provided.

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$\pi^- p$ Interactions at 360-GeV/c: Measurement of the Total and Elastic Cross-Sections and the Charged Particle Multiplicity Distribution

Firestone, A. ; Anderson, E.W. ; Chang, V. ; et al.
Phys.Rev.D 14 (1976) 2902, 1976.
Inspire Record 3926 DOI 10.17182/hepdata.24670

In a sample of 108 563 pictures taken with the Fermilab 30-inch hydrogen bubble chamber, exposed to a 360-GeV/c π− beam, we have observed 19 453 interactions in a selected fiducial region. The observed charged multiplicity distribution has been corrected for the effects of scan efficiency, errors in prong count, missed close-in vees, secondary interactions, and neutron stars and for Dalitz pairs. The two-prong events have been corrected for losses at low −t. The total cross section is measured to be 25.25 ± 0.35 mb, and the elastic cross section is 3.61 ± 0.11 mb with an exponential slope of (8.82 ± 0.30) (GeV/c)−2. The average charged-particle multiplicity for inelastic events is 8.73 ± 0.04, and the second moment f2 is measured to be 9.83 ± 0.23.

2 data tables
Table 1

SYSTEMATIC CORRECTIONS INCLUDED IN ERRORS.

Table 2

FROM FIT, FORWARD D(SIG)/DT = 31.84 +- 0.68 MB/GEV**2, AND AGREES WITH OPTICAL POINT FROM MEASURED TOTAL CROSS SECTIONS.


Inelastic Diffractive Scattering at FNAL Energies

Ayres, D.S. ; Diebold, Robert E. ; Cutts, D. ; et al.
Phys.Rev.Lett. 37 (1976) 1724, 1976.
Inspire Record 109174 DOI 10.17182/hepdata.21057

Inelastic differential cross sections have been measured for π±p, K±p, and p±p at 140- and 175-GeV/c incident momentum over a |t| range from 0.05 to 0.6 GeV2 and covering a missing-mass region from 2.4 to 9 GeV2. For Mx2 greater than 4 GeV2, the invariant quantity Mx2d2σdtdMx2 was found to be independent of Mx2 at fixed t and could be adequately described by a simple triple-Pomeron form. The values obtained for the triple-Pomeron couplings are identical within statistics for all channels.

1 data table
Table 1

Data from 140 GeV and 175 GeV are combined. The distributions are fit to CONST*(SLOPE(C=1)*T+SLOPE(C=2)*T**2).


A Comparison of the Shapes of pi+ p and p p Diffraction Peaks from 50-GeV/c to 175-GeV/c

The Fermilab Single Arm Spectrometer Group collaboration Ayres, D.S. ; Diebold, Robert E. ; Maclay, G.J. ; et al.
Phys.Rev.Lett. 37 (1976) 548, 1976.
Inspire Record 108238 DOI 10.17182/hepdata.21073

The ratio of π+p to pp elastic scattering is found to be smoothly varying over the range −t=0.03 to 0.4 GeV2. It is well fitted by a single exponential, indicating the forward behavior must be quite similar for the two reactions.

1 data table
Table 1

ACTUALLY THE DATA ARE THE EXPONENTIAL SLOPE OF THE RATIO OF D(SIG)/DT FOR THE TWO REACTIONS.


Measurement of Elastic Scattering of Hadrons on Protons from 50-GeV/c to 175-GeV/c

The Fermilab Single Arm Spectrometer Group collaboration Awes, D.S. ; Diebold, R. ; Maclay, G.J. ; et al.
Phys.Rev.Lett. 35 (1975) 1195, 1975.
Inspire Record 98699 DOI 10.17182/hepdata.21217

Differential cross sections have been measured at Fermilab with a focusing spectrometer for π±p, K±p, and p±p elastic scattering at 50-, 70-, 100-, 140-, and 175-GeV/c incident momentum over the |t| range 0.03 to 0.8 GeV2. The results are smooth in t and are parametrized by quadratic exponential fits.

1 data table
Table 1

DATA PRESENTED AGAIN IN LATER PAPER.


Charged-Particle Multiplicities in 100 GeV/c $\bar{p}p$ Interactions

Ansorge, R.E. ; Bust, C.P. ; Carter, J.R. ; et al.
Phys.Lett.B 59 (1975) 299-302, 1975.
Inspire Record 2603 DOI 10.17182/hepdata.27765

Results are presented on the topological cross sections obtained for antiproton-proton interactions from an exposure of the Fermilab 30-inch bubble chamber to a 100 GeV/ c negative beam enriched in p 's. The p p inelastic cross section is found to be σ inel = 34.6 ± 0.4 mb, and the average inelastic charged particle multiplicity to be 〈 n 〉 = 6.74 ± 0.05.

3 data tables
Table 1

ERRORS ARE STATISTICAL ONLY EXCEPT FOR 2-PRONG CROSS-SECTIONS.

Table 2

EXPONENTIAL FIT TO ELASTIC T DISTRIBUTION TO CORRECT FOR AN APPARENT LOSS OF EVENTS AT SMALL -T.

Table 3

MOMENTS OF 100 GEV/C AP P MULTIPLICITY DISTRIBUTION.


Lambda-Proton Elastic Scattering from 1-GeV/c to 17-GeV/c

Anderson, K.J. ; Gelfand, N.M. ; Keren, J. ; et al.
Phys.Rev.D 11 (1975) 473-477, 1975.
Inspire Record 103336 DOI 10.17182/hepdata.24870

The Λ-proton elastic scattering cross section has been measured between 1 and 17 GeV/c in a bubble chamber experiment. These are the first measurements of the elastic cross section for pΛ>5 GeV/c. The Λ's were produced by 25-GeV/c proton interactions in a platinum target. The cross section falls from 22 to 4 mb over the region. No significant polarization is observed.

2 data tables
Table 1

No description provided.

Table 2

CORRECTION MADE FOR KL P --> KS P.


Study of the R Meson Produced in 13-GeV/c pi+ p Interactions

Thompson, G. ; Gaidos, J.A. ; McIlwain, R.L. ; et al.
Nucl.Phys.B 69 (1974) 220-236, 1974.
Inspire Record 759 DOI 10.17182/hepdata.32359

The missing mass spectrum opposite the proton in a 750 000 picture exposure, 13 GeV/ c π + p bubble chamber experiment, is investigated in two and four pion channels for structures observed or denied by boson spectrometers at the same energy in the reaction π − p→X − p.

2 data tables
Table 1

BREIT-WIGNER FITS.

Table 2

FOR 1.6 < M(4PI) < 1.8 GEV.


Partial Wave Analysis of the (pi+ pi+ pi-) System Through the Region of the A3 Meson

Thompson, G. ; Badewitz, R.C. ; Gaidos, J.A. ; et al.
Nucl.Phys.B 69 (1974) 381-398, 1974.
Inspire Record 760 DOI 10.17182/hepdata.32348

A recent spin-parity analysis of the π + π + π − system formed opposite a proton and a coherent deuteron by incident 13 GeV/ c 2 π + mesons, is extended to a three-pion mass of 1.9 GeV/ c . Relative proportions of the contributing partial waves are presented, from threshold, and the A 3 region is discussed in detail. Contrary to results with the (3 π ) − system, a change in phase is noted for the 2 − amplitude decaying to f 0 π + via am S-wave.

7 data tables
Table 1

FOR A3+ DEFINED AS 2+ S-WAVE WITH 1.5 < M(3PI) < 1.8 GEV).

Table 2

CONSTRAINT IMPLIES RHO(11) + RHO(1-1) = 0.

Table 3

CONSTRAINT IMPLIES RHO(11) + RHO(1-1) = 0.

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Evidence for the omega pi pi decay modes of the a2 and omega(1675)

Diaz, J. ; Dibianca, F.A. ; Fickinger, W.J. ; et al.
Phys.Rev.Lett. 32 (1974) 260-264, 1974.
Inspire Record 94695 DOI 10.17182/hepdata.21339

We present evidence for the decay A20→ωπ+π0 with a branching ratio Γ(A2→ωππ)Γ(A2→ρπ)=0.28±0.09 and for the decay ω(1675)→ωπ+π− with a branching ratio Γ(ω(1975)→ωπ+π−)Γ(ω(1675)→ρπ)=0.47±0.18. Evidence is given for an intermediate B(1235)π state in the ω(1675) decay.

2 data tables
Table 1

FITTED WITH BREIT-WIGNER RESONANCES PLUS BACKGROUND.

Table 2

BACKGROUND SUBTRACTED TP DISTRIBUTIONS.