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Inclusive eta Production at Large Transverse Momenta

Donaldson, G.J. ; Gordon, H.A. ; Lai, K.-W. ; et al.

Phys.Rev.Lett. 40 (1978) 684, 1978.

Inspire Record 122477 DOI 10.17182/hepdata.20917

We have measured the ratio of inclusive production of η to π0 at transverse momenta above 1.5 GeV/c. Results are presented for various meson and proton beams with momenta of 100, 200, and 300 GeV/c incident upon a hydrogen target. The ηπ0 production ratio is found to be independent of incident beam momentum and of the transverse and longitudinal momenta of production. The ratio for pion- and proton-induced reactions is 0.44 ± 0.05; for kaons, it is 0.74 ± 0.12.

11 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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PRISM Plot Analysis of the Reaction pi- p --> pi- pi- pi+ p at 13-GeV/c

Gaidos, J.A. ; Yen, W.L. ;

Phys.Rev.D 19 (1979) 22-42, 1979.

Inspire Record 135845 DOI 10.17182/hepdata.24296

Fourteen reaction channels contributing to the final state have been separated by a prism-plot analysis of π−p→π−π−π+p interactions at 13.2 GeV/c. The results of this study are presented in terms of partial and differential cross sections, invariant-mass and decay-angular distributions, and comparisons with other separation techniques for the various resonant states.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Resonance Production in K- n --> Sigma- pi+ pi- (pi0) Reactions at 2.87-GeV/c

Katsoufis, E. ; Canter, J. ; Mann, W.A. ; et al.

Phys.Rev.D 18 (1978) 16-26, 1978.

Inspire Record 135714 DOI 10.17182/hepdata.24373

A search for exotic I=2 hyperons decaying into Σ−π− or Σ−π−π0 has been completed in the final states Σ−π+π− and Σ−π+π−π0 produced in K−n interactions at 2.87 GeV/c. Cross sections for these two final states are 303±31 μb and 660±66 μb, respectively. Upper limits for exotic processes are σ(K−n→Y*−−π+, Y*−−→Σ−π−)<13 μb and σ(K−n→Y*−−π+, Y*−−→Σ−π−π0)<23 μb for Γ(Y*−−)<120 MeV; σ(K−n→Y*−−π+π0, Y*−−→Σ−π−)<28 μb for Γ(Y*−−)<80 MeV. Production cross sections have also been measured for all nonexotic resonances observed in the two final states.

1 data table

Table 1

No description provided.

Reaction K- n --> Lambda0 pi- from 1550-MeV to 1650-MeV

Morris, W.A. ; Albright, John R. ; Colleraine, A.P. ; et al.

Phys.Rev.D 17 (1978) 55-61, 1978.

Inspire Record 134419 DOI 10.17182/hepdata.24402

This paper presents the results of a study of the reaction K−d→(ps)Λ0π−. The cross section for the process K−n→Λ0π− has been measured as a function of the center-of-mass energy in the range from 1550 to 1650 MeV. An energy-dependent partial-wave analysis was performed for this reaction, and two acceptable solutions were found. The first solution indicated no resonant structure in this energy range below the Σ(1670). The second solution indicated resonant structure in the S11 partial wave with ER=1600±6 MeV/c2, Γ(ER)=87±19 MeV/c2, and x=0.12±0.02.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Partial, Total, and Resonance Production Cross-Sections for the Reactions pi+ p --> Four Prong Final States at 10.3-GeV/c

Kennedy, C.N. ; Zemany, P.D. ; Beaufays, J. ; et al.

Phys.Rev.D 17 (1978) 2888-2900, 1978.

Inspire Record 135353 DOI 10.17182/hepdata.24403

The major production channels of four-prong final states resulting from π+p interactions at a center-of-mass energy of 4.5 GeV are studied. In addition to total production cross sections, comprehensive listings of partial and resonance production cross sections are also given for each final state of interest. All final states, including nπ+π+π+π−, are found to exhibit copious resonance production.

2 data tables

Table 1

PARTIAL CROSS SECTIONS FROM PI+ P --> PI+ P PI+ PI-.

Table 2

PARTIAL CROSS SECTIONS FROM PI+ P --> PI+ P PI+ PI- PI0.

Backward Resonance Production in pi- p --> n pi+ pi- at 8-GeV/c

Eisenstein, Bob I. ; Elliott, J. ; Mollet, W. ; et al.

Phys.Rev.D 18 (1978) 1370-1381, 1978.

Inspire Record 136306 DOI 10.17182/hepdata.24374

We have studied backward meson and baryon production in π−p→nπ+π− at 8 GeV/c using a streamer chamber triggered by the detection of the interaction of the neutron in thick-plate optical spark chambers. Our data sample of 866 events is dominated by the quasi-two-body final states Δ−(1232)π+, nρ0, and nf0. We study the differential and total backward cross sections for these states and the decay angular distributions of the resonances. The results for the Δ− and ρ0 indicate that both nucleon and Δ exchange in the u channel are important in their production, while f0 production is, as expected, consistent with nucleon exchange.

5 data tables

Table 1

No description provided.

Table 2

BACKWARD DIP.

Table 3

No description provided.

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NEUTRAL CURRENT COUPLING IN HIGH-ENERGY NEUTRINO INTERACTIONS.

Merritt, F.S. ; Barish, B.C. ; Bartlett, J.F. ; et al.

Phys.Rev.D 17 (1978) 2199-2205, 1978.

Inspire Record 132560 DOI 10.17182/hepdata.24431

We present measured hadron energy distributions for the reactions ν(ν¯)+N→ν(ν¯)+hadrons at high energy, as well as for the similar charged-current interactions. Insofar as possible, the determination of these distributions avoids any a priori assumptions about either the neutral-current or the charged-current interactions. We further analyze the neutral-current distributions within the framework of specific models, particularly the scaling model, to obtain a positive-helicity component P=0.36±0.10, which lies between pure V−A and pure V or A, and a coupling strength of g0=0.31±0.03 relative to the charged-current interaction. These coupling parameters agree well with the predictions of the Weinberg-Salam model with sin2θW=0.33±0.07.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Study of the Reaction anti-p n --> pi+ pi- pi- Between 1.09-GeV/c and 1.43-GeV/c

Mountz, J.M. ; Ming, Ma Z. ; Zemany, P. ;

Phys.Rev.D 18 (1978) 2227-2234, 1978.

Inspire Record 136560 DOI 10.17182/hepdata.19429

We have analyzed the reaction p¯n→π+π−π− in a deuterium bubble-chamber experiment for incident antiproton momenta between 1.09 and 1.43 GeV/c. Data are analyzed in terms of the Veneziano model. The magnitudes of the spin-parity functions are determined independently in an analysis of the spin-state composition of the p¯n system. The amount of each spin-dependent Veneziano amplitude is contrained to these values in the construction of a Veneziano model. The model is found to be generally in good agreement with the data. This represents a more rigorous test of the Veneziano model than previously published works.

1 data table

Table 1

FITTED FRACTIONS IN INCOHERENT SUM OF RESONANT CHANNELS.