Giacomelli, G.
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Multi-Pion and Multistrange Particle Photoproduction Off Neutrons Up to 5.3-GeV

The AACHEN-BONN-HAMBURG-HEIDELBERG-MUNICH collaboration Benz, P. ; Braun, O. ; Kiesling, Christian M. ; et al.
Nucl.Phys.B 115 (1976) 385-410, 1976.
Inspire Record 114867 DOI 10.17182/hepdata.37294

In a study of photoproduction at photon energies up to 5.3 GeV in a deuterium bubble chamber the reactions γ n→p π + π − π − and γ n→p π + π − π − π 0 were analyzed. In these reactions production of the resonances Δ ++ , Δ 0 , ϱ 0 , ω and A 2 − was observed. Photoproduction of strange particles was investigated and cross sections for the reactions γ n→ Λ K + π − , Σ − K 0 π + , pK − K 0 , Λ K 0 π + π − and Λ K + π − π 0 are presented. Production of Σ − (1385) and K ∗0 (890) was observed.

9 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Anti-p n Annihilation Into pi- pi0 Between 1-GeV/c and 1.6-GeV/c

Borreani, G. ; Quassiati, B. ; Rinaudo, G. ; et al.
Nuovo Cim.A 32 (1976) 129-138, 1976.
Inspire Record 113564 DOI 10.17182/hepdata.37637

The annihilation\(\bar pn\) → π−π0 has been studied in a D2 bubble chamber at several beam momenta between 1.0 and 1.6 GeV/c. The cross-section has been measured to be (110±15) μb at an average beam momentum of 1.3 GeV/c. The study of the angular distribution shows the presence of anL = 3 wave.

3 data tables
Table 1

NO CORRECTIONS APPLIED FOR SPECTATOR PROTON MOMENTUM CUT NOR FOR ANY RESCATTERING IN DEUTERIUM NUCLEI.

Table 2

No description provided.

Table 3

DIP AT -U = 0.4 TO 0.6 (REFLECTING DIP NEAR COS(THETA) = -0.8).


A Study of the Reactions pi+ d --> d pi+ pi- pi+ and pi+ d --> d pi+ pi- pi+ pi0 at 11.7-GeV/c

Kemp, D. ; Scarrott, S.M. ; Contri, R. ; et al.
Nuovo Cim.A 33 (1976) 369-386, 1976.
Inspire Record 114333 DOI 10.17182/hepdata.37673

The two coherent reactions π+d → dπ+π+π− and π+d → → dπ+π+π+π0 are studied in the 2 m DBC at the incoming momentum of 11.7 GeV/c. The production cross-sections are measured:σ=(0.37±±0.06) mb andσ=(0.24±0.05) mb respectively. The two reactions are analysed in the different LPS configurations. The dσ/dt′ distribution for the two reactions displays the same exp[−At′] shape withA⋍37 (GeV/c)−2 in both cases, thus indicating that the differential cross-sections are dominated by the deuteron form factor. The coherent inclastic interaction contains the channel π+d → θ0π+d with a cross-sectionσ==(20±5) µb and a signal for the B+-meson of about 12 µb. The four-pion masses display structures below 2 GeV/c.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Study of the Reaction pi+ p --> omega Delta++ (1236) at 16-GeV/c

The Aachen-Berlin-Bonn-CERN-Cracow-Heidelberg collaboration Grassler, H. ; Honecker, R. ; Laven, H. ; et al.
Nucl.Phys.B 115 (1976) 365-384, 1976.
Inspire Record 110390 DOI 10.17182/hepdata.35656

The reaction π + p→ ωΔ ++ (1236) is studied at 16 GeV/ c . Cross section, differential cross section, single and joint spin-density matrix elements are given and the correlations between the ε and Δ ++ (1236) decay angular distributions are investigated. Natural and unnatural spin-parity exchanges contribute to this reaction in roughly equal amounts. Natural exchanges lead predominantly to Δ ++ (1236) with helicity ± 3 2 , while unnatural exchanges lead predominantly to Δ ++ (1236) with helicity ± 1 2 and to ε with helicity zero. Furthermore, unnatural exchanges are small at t ′≅0.2 GeV 2 compared to other t ′ values, which may be due to the nonsense wrong-signature-zero of the B-meson exchange. Quark model relations are found to be satisfied by the data.

6 data tables
Table 1

CORRECTED FOR UNSEEN OMEGA DECAY MODES. 'SLICE METHOD' USED TO HANDLE RESONANCE TAILS AND BACKGROUND.

Table 2

FROM EVENTS WITHIN MASS-CUTS FOR RESONANCES AND NORMALIZED TO TOTAL CROSS SECTION.

Table 3

'ALL'.

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Measurement and Pion Exchange Analysis of the Inclusive Spectra n p --> p x0 Between 1.4-GeV/c and 1.9-GeV/c and Determination of the Differential Cross-Sections n p --> p Delta0 (33)

Bizard, G. ; Bonthonneau, F. ; Laville, J.L. ; et al.
Nucl.Phys.B 108 (1976) 189-213, 1976.
Inspire Record 114331 DOI 10.17182/hepdata.35799

A set of 43 momentum spectra from the inclusive reaction np→pX 0 was measured with good statistical accuracy at 1.39, 1.56, 1.73 and 1.90 GeV/ c (about 10 spectra per incident momentum), with a neutron beam obtained by stripping deuterons. The final proton was analysed in an angular region of between 0° and 20° in the laboratory by a magnetic spectrometer.

2 data tables
Table 1

THE INDICATED POSSIBLE SYSTEMATIC ERROR ARISES FROM EXTRAPOLATION OF D(SIG)/DT TO THETA = 90 DEG.

Table 2

No description provided.


Study of the Reaction pi+ p --> rho0 Delta++ (1236) at 16-GeV/c

The Aachen-Berlin-Bonn-CERN-Cracow-Heidelberg collaboration Honecker, R. ; Lauscher, P. ; Laven, H. ; et al.
Nucl.Phys.B 106 (1976) 365-384, 1976.
Inspire Record 108897 DOI 10.17182/hepdata.35864

The reaction π + p → ϱ 0 Δ ++ (1236) at 16 GeV/ c has been studied. Cross section, differential cross section, single and joint spin-density matrix elements are given. Correlations between the ϱ 0 and Δ ++ (1236) decay distributions are observed. Unnatural spin-parity exchanges, mainly observed at small t ' values, dominate the ϱ 0 Δ ++ (1236) production. The natural exchange contributions are only (7 ± 2)% and become as important as the unnatural exchanges beyond t ' = 0.3 GeV 2 . Contributions to Δ ++ (1236) helicity 3 2 states do not exceed 20% of the total ϱ 0 Δ ++ (1236) cross section and are mainly due to unnatural exchanges.

6 data tables
Table 1

'SLICE METHOD' USED TO HANDLE RESONANCE TAILS AND BACKGROUND.

Table 2

FROM EVENTS WITHIN MASS-CUTS FOR RESONANCES AND NORMALIZED TO TOTAL CROSS SECTION.

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A Study of K+ n Charge Exchange at 2-GeV/c-3-GeV/c

Banerjee, S. ; Campbell, J.R. ; Hall, G. ; et al.
Nucl.Phys.B 105 (1976) 431-444, 1976.
Inspire Record 113576 DOI 10.17182/hepdata.35965

In an experiment with the 1.5 m bubble chamber at the Rutherford Laboratory, the reaction K + d→K 0 pp has been studied at beam momenta of 2.2, 2.45 and 2.7 GeV/ c . The cross section for the reaction K + n→K 0 p has been estimated and found to be approximately twice that of the line-reversed reaction K − p → K 0 n at comparable energies. An SU(3) sum rule, due to Barger and Cline, has been tested and found not to be valid in this momentum range. The differential cross section for K + n→K 0 p has also been measured and a determination made of the imaginary to real ratio of the forward amplitude, using the optical theorem. Implications of these, and other results, for various Regge models are briefly discussed.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Inelastic Two Prong Events in 147-GeV/c $\pi^- p$ Collisions.

Fong, D. ; Heller, M. ; Shapiro, A. ; et al.
Nucl.Phys.B 104 (1976) 32-51, 1976.
Inspire Record 112609 DOI 10.17182/hepdata.36026

None

1 data table
Table 1

No description provided.


Determination of the Cross-Sections for Multiple Production of pi0 Mesons in Four Prong pi- p Interactions at 5-GeV/c

Amaglobeli, N.S. ; Budagov, Yu.A. ; Vinogradov, V.B. ; et al.
Sov.J.Nucl.Phys. 23 (1976) 515-517, 1976.
Inspire Record 116407 DOI 10.17182/hepdata.47201

None

2 data tables
Table 1

USING METHOD (A), SEE THE ARTICLE.

Table 2

USING METHOD (B), SEE THE ARTICLE.


New Data on the Reaction K- p --> Sigma+- pi+- from 1.934-GeV/c to 2.516-GeV/c and Partial Wave Analysis for These Reactions, Between 2070-MeV and 2436-MeV CMS Energy

de Bellefon, A. ; Billoir, Pierre ; Berthon, A. ; et al.
Nuovo Cim.A 37 (1977) 175, 1977.
Inspire Record 100939 DOI 10.17182/hepdata.37615

We present the results of a formation experiment for the reactions K±p→Σ±π± in the c.m.s. energy between 2200 and 2436 MeV with a total statistics of 10 ev/μb. A partial-wave analysis including these new data gives evidence for the existence of three resonances in theD15,G19 andH09 states and confirms the existence of anF05 state.

17 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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