Khurelbaatar, B.
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Production and decay of sigma(1660)

Apsell, S.P. ; Ford, P. ; Gourevitch, S. ; et al.
Phys.Rev.D 10 (1974) 1419-1429, 1974.
Inspire Record 95499 DOI 10.17182/hepdata.25064

An investigation has been performed of some properties of Σ(1660) produced in the reaction K−p→Σ+(1660)π− at 2.87 GeV/c incident K− momentum. The decay modes observed for this state include Λ(1405)π and Σπ. The spin and parity are measured to be JP=32−. The differential cross section of the Λ(1405)π decay mode is sharply peaked in the forward direction, falling exponentially with a slope of 5.6 ± 0.7 (GeV/c)−2, while the slope for the Σ0π+ decay mode is 2.1 ± 0.4 (GeV/c)−2. The difference in the ratio of backward to total events for the two decay modes also suggests that two Σ(1660)'s exist.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Experimental Study of the New 3.1 GeV Particle by e+ e- Collision at #techn{ADONE}

Ash, W.W. ; Zorn, G.T. ; Bartoli, B. ;
Lett.Nuovo Cim. 11 (1974) 705, 1974.
Inspire Record 98138 DOI 10.17182/hepdata.37481

None

1 data table
Table 1

No description provided.


Cross-sections for quasi-two-body reactions in k- p interactions between 1263 and 1843 mev/c

Berthon, A. ; Tristram, G. ; Vrana, J. ; et al.
Nuovo Cim.A 21 (1974) 146-167, 1974.
Inspire Record 96519 DOI 10.17182/hepdata.37752

We give the cross-sections of quasi-two-body reactions produced in K−-proton interactions at 13 different energies in the centreof-mass energy range 1.915 to 2.168 GeV.

1 data table
Table 1

No description provided.


Analysis of Two Prong Events on p p Interactions at 205-GeV/c: Separation of Elastic and Inelastic Events.

Barish, S. ; Colley, D. ; Derrick, M. ; et al.
Phys.Rev.D 9 (1974) 1171-1179, 1974.
Inspire Record 93436 DOI 10.17182/hepdata.21998

We present results of complete measurements of the two-prong events observed in a 50 000-picture exposure of the 30-in. hydrogen bubble chamber to a 205−GeVc proton beam at the National Accelerator Laboratory. Using kinematic fitting, elastic and inelastic events are separated and cross sections are obtained. The total two-prong cross section is measured to be 9.77 ± 0.40 mb, of which 2.85 ± 0.26 mb represents the inelastic contribution. The total elastic cross section is measured to be 6.92 ± 0.44 mb. Our data are consistent with the break in dσdt at |t|∼0.1−0.2 (GeVc)2 observed at the CERN ISR. A prominent low-mass enhancement is observed in the distribution of missing mass squared from the slow proton for the inelastic events. An analysis based on the missing-mass spectrum and the particle rapidities shows that this low-mass enhancement accounts for about 77% of the total inelastic two-prong cross section. The diffractive cross section in the two-prong events is 2.20 ± 0.25 mb, in agreement with certain two-component models.

2 data tables
Table 1

USING A TOTAL CROSS SECTION OF 39.0 +- 1.0 MB.

Table 2

No description provided.


Study of the reaction p d ---> he-3 x0

Brody, H. ; Groves, E. ; Van Berg, R. ; et al.
Phys.Rev.D 9 (1974) 1917-1932, 1974.
Inspire Record 92993 DOI 10.17182/hepdata.21985

The missing-mass technique has been used to study the spectra of neutral mesons produced by 2- and 3-Gev protons in the reaction p+d→He3+x0. Cross sections (dσdΩc.m.) of about 10−34 cm2/sr were observed for the π, η, and ω for 3-GeV protons. A peak with a much smaller cross section was observed at a mass of 956 MeV. We have tentatively identified this peak as the η′. Cross sections for the π and η were nearly a factor of 10 larger at 2 GeV than at 3 GeV. Deviations from simple phase space were observed near the two-pion threshold in both 2-GeV and 3-GeV data. Details of the experimental method and of the results are presented.

1 data table
Table 1

Axis error includes +- 0.0/0.0 contribution (?////).


Production of f0 mesons in 4.5-gev/c pi- p interactions

Holloway, L.E. ; Huld, B. ; Jordan, M. ; et al.
Phys.Rev.D 9 (1974) 1161-1170, 1974.
Inspire Record 92997 DOI 10.17182/hepdata.21996

An optical spark chamber and neutron time-of-flight spectrometer experiment studied the reaction π−p→π+π−n at incident pion momentum of 4.5 GeVc in the mass region of the f0 meson. Analysis of the data shows no evidence for anomalous structure in the f0 mass spectrum. The two-pion differential cross section in the f0 region is consistent with Wolf's one-pion-exchange model for momentum transfers (squared) −t≲0.7 (GeVc))2. The differential cross section is larger than that predicted at high momentum transfer, and may be attributed to natural-parity-exchange contributions as evidenced in the f0 decay distribution.

2 data tables
Table 1

No description provided.

Table 2

DIPION PRODUCTION CROSS SECTION NORMALIZED AT LOW -T TO A WOLF-MODEL F CROSS SECTION OF 400 MUB.


Investigation of the reaction pi- p ---> omega0 n at 3.65, 4.50, and 5.50 gev/c

Holloway, L.E. ; Huld, B. ; Jordan, M. ; et al.
Phys.Rev.D 8 (1973) 2814-2826, 1973.
Inspire Record 93327 DOI 10.17182/hepdata.22060

An experiment using optical spark chambers and a neutron time-of-flight hodoscope has been performed at the Argonne National Laboratory on the reaction π−p→ω0n. The differential cross section and the experimentally accessible density-matrix elements were determined in the momentum transfer interval 0.05≤|t|≤1.0 (GeV/c)2 at each of three incident pion momenta 3.65, 4.50, and 5.50 GeV/c. Our results show the following general features: (1) a dip in the forward differential cross section for |t|≤0.2 (GeV/c)2, (2) a slope at larger momentum transfers which increases as the incident pion momentum increases, and (3) no dips in either dσdt or ρ11+ρ1−1, the natural-parity exchange combination, at |t|=0.6 (GeV/c)2.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Updated Charged-Particle Multiplicity Distribution from 205-GeV/c Proton Proton Interactions

Barish, S. ; Cho, Y. ; Colley, D.C. ; et al.
Phys.Rev.D 9 (1974) 2689, 1974.
Inspire Record 609 DOI 10.17182/hepdata.21974

The charged-particle multiplicity distribution in 205−GeVc proton-proton interactions is presented. In addition, the total diffractive contributions to each charged multiplicity are estimated assuming a factorizable Pomeron.

1 data table
Table 1

THE TOTAL CROSS SECTION NORMALIZATION COMES FROM THIS AND OTHER EXPERIMENTS.


The Discovery of a Second Narrow Resonance in e+ e- Annihilation

Abrams, G.S. ; Briggs, D. ; Chinowsky, William ; et al.
Phys.Rev.Lett. 33 (1974) 1453-1455, 1976.
Inspire Record 91611 DOI 10.17182/hepdata.21287

We have observed a second sharp peak in the cross section for e+e−→hadrons at a center-of-mass energy of 3.695±0.004 GeV. The upper limit of the full width at half-maximum is 2.7 MeV.

1 data table
Table 1

No description provided.


Multiplicities, topological cross-sections, and single particle inclusive distributions from p p interactions at 12-GeV/c and 24-GeV/c

The Bonn-Hamburg-Munich collaboration Blobel, V. ; Brandenburg, G.W. ; Fesefeldt, H. ; et al.
Nucl.Phys.B 69 (1974) 454-492, 1974.
Inspire Record 94379 DOI 10.17182/hepdata.32358

Results on multiplicities, topological cross sections, total particle production cross sections, and correlations between charged particle and π 0 production are presented for pp interactions at 12 and 24 GeV/ c incident laboratory momentum. Inclusive production of π ± , K s 0 , p , Λ, Σ ± and Λ is studied; particle spectra are shown in single and double differential form and are compared, in different kinematic regions, with data obtained at other incident momenta and with other beam particles.

2 data tables
Table 1

No description provided.

Table 2

No description provided.