HEPData Search

Differential cross sections have been measured for π+p and π−p elastic scattering at 378, 408, 427, 471, 509, 547, 586, 625, 657, and 687 MeV/c in the angular range -0.8<cosθc.m.<0.8. The scattered pion and recoil proton were detected in coincidence using scintillation-counter hodoscopes. A liquid-hydrogen target was used except for measurements at forward angles, in which a CH2 target was used. Statistical uncertainties in the data are typically less than 1%. Systematic uncertainties in acceptance and detection efficiency are estimated to be 1%. Absolute normalization uncertainties are 2–3 % for most of the data. The measurements are compared with previous data and with the results of recent partial-wave analyses. The data are fit with Legendre expansions from which total elastic cross sections are obtained.

23 data tables

Table 1

Normalisation uncertainty = 3.1 pct.

Table 2

Normalisation uncertainty = 4.1 pct.

Table 3

Normalisation uncertainty = 2.1 pct.

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Analyzing Power for $\pi^- P$ Charge Exchange and a Test of Isospin Invariance Up to $\eta$ Threshold

Wightman, J.A. ; Eichon, A.D. ; Kim, G.J. ; et al.

Phys.Rev.D 36 (1987) 3529-3532, 1987.

Inspire Record 255689 DOI 10.17182/hepdata.23322

The analyzing power for π−p→π0n has been measured at five incident momenta from 547 to 687 MeV/c using a transversely polarized target. Data were obtained with scintillation counters at 10 angles simultaneously covering the range −0.9≤cosθc.m.π≤0.9. Our results and those of Kim et al. are used for a model-independent test of isospin invariance which is based on the triangle inequalities applied to the transversity-up as well as the transversity-down cross sections. No evidence is found of isospin violation.

5 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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MULTIPLICITY, RAPIDITY, AND RAPIDITY CORRELATIONS IN 800-GEV PROTON NUCLEUS INTERACTIONS

Shivpuri, R.K. ; Kotha, A. ;

Phys.Rev.D 35 (1987) 3508-3511, 1987.

Inspire Record 254224 DOI 10.17182/hepdata.23361

In interactions of 800-GeV protons with emulsion nuclei, the multiplicity and rapidity distributions of charged secondary particles are studied. The existence of strong short-range correlations among the secondary particles is found. Evidence of independent emission of low-multiplicity clusters is presented.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Measurement of $\bar{P} P$ Elastic Scattering at Beam Momenta Between 390-{MeV}/c and 780-{MeV}/c

Kageyama, T. ; Fujii, T. ; Nakamura, K. ; et al.

Phys.Rev.D 35 (1987) 2655-2669, 1987.

Inspire Record 250022 DOI 10.17182/hepdata.23379

The differential cross sections of p¯p elastic scattering have been measured at incident beam momenta of 390, 490, 590, 690, and 780 MeV/c. The results are compared with the predictions of various N¯N potential models. None of these models completely explains the present results.

2 data tables

Table 1

No description provided.

Table 2

Legendre expansion coefficients.

Search for Charmed Mesons Produced in Hadronic Interactions

Ginther, G. ; Edelstein, R.M. ; Forsyth, C.P. ; et al.

Phys.Rev.D 35 (1987) 1541-1552, 1987.

Inspire Record 252546 DOI 10.17182/hepdata.23386

The hadronic production of charmed states was studied in a two-arm spectrometer using a 205-GeV/c negative-pion beam incident upon a beryllium target. One arm, filled with dense absorber, triggered the detectors upon the passage of a muon with a moderate transverse momentum and a total momentum of at least 4 GeV/c. The other arm was an open-geometry magnetic spectrometer which had both neutral- and charged-particle identification capabilities. The apparatus, the data, and an invariant-mass-plot search for evidence of charmed-meson production through several charged-particle decay modes are described. The Kπ, Kππ, and Kπππ mass plots fail to reveal significant D-meson signals. Based upon the Kπ mass plots, the 95%-confidence upper limit on the DD¯ production cross section is found to be less than 51 μb per nucleon for the production models tested. A search for evidence of charged-D* production yields 30±16 combinations above background in association with the expected trigger muon charge. Interpreted as a D* signal, this excess corresponds to a model-dependent inclusive DD¯ production cross section of 34±18−9+14 μb per nucleon. Model-dependent upper limits on the ratio of the F to D cross sections are also presented.

4 data tables

Table 1

Uncorrelated model for charmed mesons production.

Table 2

'Correlated' model for pair of charmed mesons production.

Table 3

Uncorrelated model for D/S+- mesons production.

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Production of Neutral Strange Particles $K^0_S$ and $\Lambda^0$ by 12-{GeV} Protons on Nuclear Targets

Abe, F. ; Hara, K. ; Kim, S. ; et al.

Phys.Rev.D 36 (1987) 1302-1319, 1987.

Inspire Record 254118 DOI 10.17182/hepdata.23355

Cross sections for the inclusive processes p+A→KS0+X and p+A→Λ0+X (A=Be, Cu, and W) have been measured for incident protons at 12 GeV. Data are obtained at five laboratory production angles of 3.5°, 5.0°, 6.5°, 8.0°, and 9.5°, covering the kinematic range 0.3≤xF≤0.8 and 0.4≤pT≤1.3 GeV/c for KS0’s and 0.2≤xF≤0.9 and 0.4≤pT≤1.7 GeV/c for Λ0’s. The results are discussed in terms of the pT dependence, the xF dependence, the A dependence, the cross-section ratio KS0/Λ0, and triple-Regge behavior. The A dependence of KS0 and Λ0 spectra is analyzed in the constituent-quark model. The average pT2’s of quarks and diquarks involved in the KS0 and Λ0 production processes are discussed.

10 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.