Bizot, J.C.
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Study of Hypercharge Exchange Reactions of the Type K- p --> 1- 3/2+- at 4.2-GeV/c

The Amsterdam-CERN-Nijmegen-Oxford collaboration Aguilar-Benitez, M. ; Barreiro, F. ; Hemingway, R.J. ; et al.
Nucl.Phys.B 124 (1977) 189-228, 1977.
Inspire Record 101289 DOI 10.17182/hepdata.50024

Results are presented for the quasi two-body hypercharge exchange reactions of the type using data from a high statistics bubble chamber experiment. Total and differential cross sections and the momentum transfer dependence of the meson and hyperon resonance single density matrix elements are discussed. Amplitude analyses are performed for the first two reactions. The results are compared with quark model and duality predictions and with those from other related reactions.

20 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Differential Cross-Section Measurements of pi- p ---> pi0 n Around the P(33) (1232) Resonance

Comiso, J.C. ; Blasberg, D.J. ; Haddock, R.P. ; et al.
Phys.Rev.D 12 (1975) 738, 1975.
Inspire Record 91073 DOI 10.17182/hepdata.24822

Differential cross sections for π−p→π0n at five angles for 239, 264, 295, 323, and 375 MeV/c incident pions are presented. The measurements employ the neutron-photon coincidence method, using carefully calibrated neutron counters and an efficient, large-area photon detector. Good agreement is found with the results of the CERN phase-shift analysis.

7 data tables
Table 1

Axis error includes +- 6.3/6.3 contribution.

Table 2

Axis error includes +- 5.5/5.5 contribution.

Table 3

Axis error includes +- 5.2/5.2 contribution.

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Inverse Pion Photoproduction in the Vicinity of the p33 (1232) Resonance and a Test of Time Reversal Invariance

Comiso, J.C. ; Blasberg, D.J. ; Haddock, R.P. ; et al.
Phys.Rev.D 12 (1975) 719, 1975.
Inspire Record 91072 DOI 10.17182/hepdata.24803

Differential cross-section measurements are presented for π−p→γn at five energies around the p33(1232) resonance. A detailed comparison is made with γn→π−p deduced from γd experiments. In general, the results are in support of detailed balance. Using the Christ-Lee-Donnachie-Shaw model, our new data indicate that the T-violating phase in the isovector part of the M1+ multipole is less than 2°, which is a very sensitive test of time-reversal invariance. No evidence is found for a possible isotensor component of the electromagnetic current. Our data are compared to various multipole analyses. In general, the agreement is poor.

11 data tables
Table 1

Axis error includes +- 6.3/6.3 contribution.

Table 2

No description provided.

Table 3

No description provided.

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A Search for Delta I = 2 Electromagnetic Currents in Pion Photoproduction

Clifft, R.W. ; Gabathuler, E. ; Littenberg, L.S. ; et al.
Phys.Rev.Lett. 33 (1974) 1500, 1974.
Inspire Record 90951 DOI 10.17182/hepdata.21245

Differential cross sections for the reactions γp→π0p, π+n and γn→π−p, π0n were measured in a single experiment using tagged photons in the energy region 240-450 MeV incident on H21 and H22 targets. Results of the measurements of the ratios π0nπ0p and π−pπ+n are presented. The ratio of isotensor to isovector amplitude is found to be 0.00±0.02.

15 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Polarization Measurements in pi+ p Elastic Scattering from 0.6-GeV/c to 2.65-GeV/c

Martin, J.F. ; Sleeman, J.C. ; Brown, Robert M. ; et al.
Nucl.Phys.B 89 (1975) 253-286, 1975.
Inspire Record 90870 DOI 10.17182/hepdata.6743

This paper presents the results of a counter experiment at the Rutherford Laboratory, in which the polarization parameter in π + p elastic scattering was measured. Data were taken at 64 incident pion momenta between 0.60 and 2.65 GeV/ c . The results are found to be in generally good agreement with those of other experiments, and have substantially higher precision at many momenta.

128 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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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.


Total hadronic photoabsorption cross-sections of nuclei for photons in the gev energy range

Brookes, G.R. ; Clough, A.S. ; Freeland, J.H. ; et al.
Phys.Rev.D 8 (1973) 2826-2836, 1973.
Inspire Record 93332 DOI 10.17182/hepdata.22018

The total hadronic photoabsorption cross sections of a number of nuclei (C, Al, Cu, Nb, Sn, Ta, Pb) have been studied in detail using a tagged photon beam over the energy range 1.7-4 GeV. The results are described, and compared with models of photoabsorption.

3 data tables
Table 1

STATISTICAL ERRORS. MEAN CROSS SECTIONS FOR EACH OF THE TWO ELECTRON BEAM ENERGIES OF 3.5 AND 4.6 GEV ARE ALSO GIVEN.

Table 2

A-EFFECTIVE/A, USING SIG(GAMMA P) = 137 MUB AND SIG(GAMMA N) = 126 MUB. STATISTICAL ERRORS.

Table 3

A-EFFECTIVE/A, USING SIG(GAMMA P) = 129 MUB AND SIG(GAMMA N) = 123 MUB. STATISTICAL ERRORS.


A study of the hypercharge exchange reactions k- p ---> 1- 1/2+ at an incoming momentum of 4.25 gev/c

De Groot, A.J. ; Hodgland, W. ; Jongejans, B. ; et al.
Nucl.Phys.B 74 (1974) 77-101, 1974.
Inspire Record 94650 DOI 10.17182/hepdata.32272

Results are reported of a study of the hypercharge reactions K − p → ωΛ (la), K − p → φΛ (lb), K − p → φ ∑ o (lc), K − p → ϱ o Λ (ld), K − p → ϱ o ∑ o (le), K − p → ϱ − ∑ + (lf) in a 12 events/ub bubble chamber experiment using K − mesons of 4.25 GeV/ c momentum. Total and differential cross sections are presented as well as the density matrix elements of the peripherally produced vector meson and (except for reaction (1f)) the hyperon polarization. For reactions (1a) and (1b) an amplitude analysis is performed. The mass and the width of the ϱ−, φ− and f-meson have been determined.

4 data tables
Table 1

FURTHER DATA FROM THIS COLLABORATION ON THESE REACTIONS WITH TEN TIMES BETTER STATISTICS ARE PRESENTED IN M. J. LOSTY ET AL., NP B133, 38 (1978).

Table 2

No description provided.

Table 3

No description provided.

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Experimental Evidence for Structures in the Momentum Dependence of the n + p --> p + n Charge-Exchange Peak Between 1-GeV/c and 2-GeV/c

Bizard, G. ; Bonthonneau, F. ; Laville, J.L. ; et al.
Nucl.Phys.B 85 (1975) 14-30, 1975.
Inspire Record 615 DOI 10.17182/hepdata.7809

21 differential cross section measurements of the np → pn charge-exchange reaction have been carried out at the synchrotron Saturne (Saclay), for incident neutron momenta between 1 and 2 GeV/ c and in the squared four-momentum transfer range 0 ⩽ −t ⩽ 0.4 (GeV/ c ) 2 . The π exchange peak is seen at all the incident momenta. The s dependence of the very forward slope of this peak shows weak structures near the threshold of inelastic channels.

42 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Study of the reaction pi+ n ---> omega p at 6.0 gev/c

Anderson, J.C. ; Engler, A. ; Kraemer, R.W. ; et al.
Phys.Lett.B 45 (1973) 165-168, 1973.
Inspire Record 84780 DOI 10.17182/hepdata.28073

An analysis of the reaction π + n→ ω p in a 6.0 GeV/ c bubble chamber experiment is presented. The production differential cross section and spin density matrix elements are compared with Regge exchange models.

3 data tables
Table 1

CORRECTED FOR BACKGROUND.

Table 2

HELICITY FRAME. T-DEPENDENT BACKGROUND SUBTRACTED.

Table 3

TRANSVERSITY FRAME. T-DEPENDENT BACKGROUND SUBTRACTED.