The Differential Cross-Section of the Reaction K- p --> anti-K0 n from 515-MeV/c to 956-MeV/c

Alston-Garnjost, M. ; Kenney, R.W. ; Pollard, D.L. ; et al.
Phys.Rev.D 17 (1978) 2226, 1978.
Inspire Record 121140 DOI 10.17182/hepdata.4517

The differential cross section for the charge-exchange reaction K−p→K¯0n has been measured at 22 incident momenta between 515 and 956 MeV/c. Experimental results and Legendre-polynomial fits to the data are presented.

25 data tables

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Measurement of $p \bar{p}$ Backward Elastic Scattering Cross-section From 406-{MeV}/$c$ to 922-{MeV}/$c$

Alston-Garnjost, M. ; Hamilton, R.P. ; Kenney, R.W. ; et al.
Phys.Rev.Lett. 43 (1979) 1901, 1979.
Inspire Record 143684 DOI 10.17182/hepdata.20757

The cross section for 180° elastic scattering of antiprotons by protons between 406 and 922 MeV/c has been measured. A single-arm spectrometer detected recoil protons corresponding to events with 〈cosθc.m.〉=−0.994. The regions of the reported resonances at 1936 and 2020 MeV were scanned in 10-MeV/c steps with a typical statistical error of ≈ 7% and an rms mass resolution of ±3 MeV. No narrow enhancements (Γ<10 MeV) were observed.

1 data table

735 MEV/C VALUE MISPRINTED IN JOURNAL - CORRECTION SUPPLIED BY M. A. GARNJOST (PRIV COMM 28 MAR 1980).


Inclusive Delta++ Production in pi+ p and p p Interactions at 100-GeV/c and the Average Multiplicity of pi+ pi- Scattering

Erwin, J. ; Kass, R.D. ; Klems, J.H. ; et al.
Phys.Rev.Lett. 35 (1975) 980, 1975.
Inspire Record 2415 DOI 10.17182/hepdata.21100

Inclusive Δ++(1236) production in π+p and pp interactions is consistent with one-pion exchange. The average charged multiplicity recoiling from the Δ++ is studied as a function of missing mass, M2, for both interactions.

2 data tables

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Measurement of the anti-p p Charge Exchange Cross-Section Below 1-GeV/c

Alston-Garnjost, M. ; Kenney, R. ; Pollard, D. ; et al.
Phys.Rev.Lett. 35 (1975) 1685, 1975.
Inspire Record 99503 DOI 10.17182/hepdata.21220

No definite evidence for structure is found in the p¯p→n¯n cross section between 276 and 963 MeV/c. From these results limits are deduced on properties of the narrow enhancement reported in the p¯p total cross section at 475 MeV/c.

1 data table

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Backward Elastic pi+ p Scattering at 3.7-GeV/c and 7.1-GeV/c

Michael, W. ; Abrams, G.S. ; Alston-Garnjost, M. ; et al.
Phys.Rev.Lett. 35 (1975) 193, 1975.
Inspire Record 98683 DOI 10.17182/hepdata.21163

The differential cross section of π+p elastic scattering has been measured in two high-statistics bubble-chamber exposures at laboratory beam momenta of 3.7 and 7.1 GeV/c. A new feature suggested by these data is a dip in dσdu at −u≃3 GeV2. This dip corresponds well to the third zero of J0(b−u′), where ℏcb=1 fm. The effective u-channel Regge trajectory computed for these two energies has a slope of 0.22 ± 0.26.

1 data table

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Reactions $K^- p \to \Sigma^- \pi^+$ and $K^- p \to \Sigma^+ \pi^-$ in the Momentum Range From 220-{MeV}/c to 470-{MeV}/c

Bangerter, R.O. ; Alston-Garnjost, M. ; Barbaro-Galtieri, A. ; et al.
Phys.Rev.D 23 (1981) 1484, 1981.
Inspire Record 152277 DOI 10.17182/hepdata.24146

We present the analysis of 64 000 K−p→Σ−π+ and 89 000 K−p→Σ+π− events obtained with the Berkeley 25-in. hydrogen bubble chamber. Total cross sections and Legendre-polynomial expansion coefficients describing the differential cross sections and polarizations are presented in 10-MeV/c momentum intervals extending from 220 to 470 MeV/c. This paper completes the series devoted to all K−p final states in this momentum range.

4 data tables

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Backward $K^- p$ Elastic Scattering and 0-degree $\Sigma^- \pi^+$ Production

Alston-Garnjost, M. ; Hamilton, R.P. ; Kenney, R.W. ; et al.
Phys.Rev.D 21 (1980) 1191-1205, 1980.
Inspire Record 131715 DOI 10.17182/hepdata.24193

In this paper we report measurements of the backward K−p differential cross section at 49 momenta covering the momentum range 476-1084 MeV/c. The statistical precision achieved, typically 2.5%, is an order of magnitude better than previous measurements. The systematic errors for this reaction are about 1%. The differential cross section for the reaction K−p→Σ−π+ where the π+ emerges at 0° has also been measured at 32 momenta with comparable improvement in precision over previous experiments. A partial-wave analysis of the K¯N channels including the new K−p backward elastic data is presented.

2 data tables

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Neutral Particle Production in pi+ p and p p Collisions at 100-GeV/c

Alston-Garnjost, Margaret ; Erwin, J. ; Klems, J.H. ; et al.
Phys.Rev.Lett. 35 (1975) 142, 1975.
Inspire Record 98682 DOI 10.17182/hepdata.21191

We have measured the inclusive cross sections for γ, Ks0, Λ, and Λ¯ production in π+p and pp interactions at 100 GeV/c and compared various inclusive distributions of the produced γ and Ks0.

8 data tables

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Elastic, Charge Exchange, and Total K- p Cross-Sections in the Momentum Range 220-MeV/c to 470-MeV/c

Mast, Terry S. ; Alston-Garnjost, Margaret ; Bangerter, Roger O. ; et al.
Phys.Rev.D 14 (1976) 13, 1976.
Inspire Record 100579 DOI 10.17182/hepdata.24699

An analysis has been made of 64 600 events of the type K−p→K−p and 22 800 events of the type K−p→K¯0n in the Berkeley 25-in. hydrogen bubble chamber. Differential cross sections have been measured in intervals of 10 MeV/c over the momentum range 220 to 470 MeV/c. Legendre-polynomial fits to the distributions have been made, and the coefficients show structure from the resonant D-wave [Λ(1520)] and background S and P waves. No new structure is observed. The total K−p cross section determined from measurements of all final states seen in this exposure is also presented.

6 data tables

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Production of Four Prong Final States in Photon-photon Collisions

The TPC/Two Gamma collaboration Aihara, H. ; Alston-Garnjost, M. ; Avery, R.E. ; et al.
Phys.Rev.D 37 (1988) 28, 1988.
Inspire Record 261630 DOI 10.17182/hepdata.3824

Results are presented on the exclusive production of four-prong final states in photon-photon collisions from the TPC/Two-Gamma detector at the SLAC e+e− storage ring PEP. Measurement of dE/dx and momentum in the time-projection chamber (TPC) provides identification of the final states 2π+2π−, K+K−π+π−, and 2K+2K−. For two quasireal incident photons, both the 2π+2π− and K+K−π+π− cross sections show a steep rise from threshold to a peak value, followed by a decrease at higher mass. Cross sections for the production of the final states ρ0ρ0, ρ0π+π−, and φπ+π− are presented, together with upper limits for φρ0, φφ, and K*0K¯ *0. The ρ0ρ0 contribution dominates the four-pion cross section at low masses, but falls to nearly zero above 2 GeV. Such behavior is inconsistent with expectations from vector dominance but can be accommodated by four-quark resonance models or by t-channel factorization. Angular distributions for the part of the data dominated by ρ0ρ0 final states are consistent with the production of JP=2+ or 0+ resonances but also with isotropic (nonresonant) production. When one of the virtual photons has mass (mγ2=-Q2≠0), the four-pion cross section is still dominated by ρ0ρ0 at low final-state masses Wγγ and by 2π+2π− at higher mass. Further, the dependence of the cross section on Q2 becomes increasingly flat as Wγγ increases.

12 data tables

UNTAGGED DATA.

TAGGED DATA, RESULTS OBTAINED USING TRANSVERSE-TRANSVERSE LUMINOSITY ONLY. DATA FOR Q2=0 ARE FROM UNTAGGED SAMPLE, ERRORS DUE TO RELATIVE NORMALISATION OF THESE SAMPLES IS INCLUDED INTO ERRORS QUOTED.

UNTAGGED DATA.

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