Charge exchange and production of eta mesons and multiple neutral pions in pi- p reactions between 654 and 1247 mev/c

Bulos, F. ; Lanou, R.E. ; Piper, A.E. ; et al.
Phys.Rev. 187 (1969) 1827-1844, 1969.
Inspire Record 62084 DOI 10.17182/hepdata.5293

An experiment designed to study the π−p total neutral cross section and its breakdown into several channels has been performed at eleven incident pion momenta ranging from 654 to 1247 MeV/c. Angular distributions for the charge exchange π0 and for η0 production are given in terms of Legendre-polynomial expansion coefficients. Forward and backward differential cross sections are presented for the charge-exchange channel and comparisons with recent dispersion-relation predictions for the forward cross section are made.

34 data tables

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Study of the two-charged-particle final states of 3.9-gev/c pi+- p interactions including a longitudinal-momentum analysis of the one-pion- production channels

Bastien, P.L. ; Carmel, Z. ; Dao, F.T. ; et al.
Phys.Rev.D 3 (1971) 2047-2064, 1971.
Inspire Record 68000 DOI 10.17182/hepdata.23677

We have analyzed the two-prong final states in π+p interactions at 3.9 GeVc. Our result for elastic scattering is σ (elastic) = 6.50±0.1 mb (statistical error only). We find the elastic slope to be 6.61±0.14 (GeVc)−2. We find the elastic forward cross section to be 40.0±1.4 mb(GeVc)2. We have applied a longitudinal-momentum analysis to the one-pion-production channel. We find the cross section for the reaction π++p→π++π0+p to be 2.30±0.06 mb and that for π++p→π++π++n to be 1.45±0.05 mb. For resonance-production cross sections in these channels we find Δ(1236)=0.60±0.07 mb, ρ(760)=0.86±0.06 mb, and diffraction dissociation = 1.69±0.11 mb. We find that we can satisfactorily fit all distributions in the one-pion-production channel without assuming any phase-space production. In the missing-mass channel we observe dominant Δ++(1236) production plus evidence for A2+ production.

15 data tables

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Investigation of the reaction pi- p ---> p x- at the momentum of 3.25 gev/c with high momentum transfer

Baloshin, O.N. ; Vladimirskii, V.V. ; Dukhovskoi, I.A. ; et al.
Yad.Fiz. 14 (1971) 131-133, 1971.
Inspire Record 69451 DOI 10.17182/hepdata.19279

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1 data table

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Pi- p interactions at 3.25 gev/c. two-prong events

Guzhavin, V.M. ; Vetlitskii, I.A. ; Kaidalov, A.B. ; et al.
Yad.Fiz. 14 (1971) 354-366, 1971.
Inspire Record 69448 DOI 10.17182/hepdata.19292

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1 data table

BREIT-WIGNER RESONANCE FITS WITH BACKGROUND.


Prism plot - a new analysis of multibody final states

Brau, J.E. ; Dao, F.T. ; Hodous, M.F. ; et al.
Phys.Rev.Lett. 27 (1971) 1481-1485, 1971.
Inspire Record 68878 DOI 10.17182/hepdata.21501

We present a new technique for analyzing multibody states. This analysis makes possible the selection of samples of events that contain only resonances, particle correlations, or phase space. A unique feature of this analysis is that every event in the data is assigned to a particular sample. The three-body final state π++p→p+π++π0 is analyzed as an example.

1 data table

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Transmission regeneration of neutral k-mesons on hydrogen in the momentum region 14-42 gev/c

Birulev, V.K. ; Vovenko, A.S. ; Vestergombi, G. ; et al.
Yad.Fiz. 15 (1972) 959-965, 1972.
Inspire Record 76029 DOI 10.17182/hepdata.19284

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1 data table

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Transmission regeneration of neutral k-mesons on hydrogen in the momentum region of 14-42 gev/c

Birulev, V.K. ; Fadeev, N.G. ; Golovanov, L.B. ; et al.
Phys.Lett.B 38 (1972) 452-456, 1972.
Inspire Record 75815 DOI 10.17182/hepdata.28334

The measurements of the transmission regeneration amplitude on hydrogen in the momentum region of 14–42 GeV/ c indicate that in accordance with the Pomeranchuk theorem its magnitude |ƒ° − ƒ °|/k decreases as energy increases and its phase is approximately constant and equal to arg (ƒ° − ƒ °) = (−118 ± 13)° .

1 data table

THE REGENERATION AMPLITUDE DECREASES OVER THIS ENERGY RANGE.


Momentum dependence of the 180-degrees pi- p charge-exchange cross-section

Kistiakowsky, V. ; Feld, B.T. ; Triantis, F.A. ; et al.
Phys.Rev.D 6 (1972) 1882-1905, 1972.
Inspire Record 83145 DOI 10.17182/hepdata.3611

The π−+p→π0+n differential cross section at 180° has been measured for 52 values of π− momentum from 1.8 to 6.0 GeV/c using a constant-geometry detection system. The average statistical uncertainty is ∼5% and the systematic uncertainty is ∼10%. The details of the experiment and the data analysis are discussed. The data are compared with those of other experiments with which they are generally in agreement. One set of data disagrees with those presented here and a possible reason for this is discussed. A five-parameter fit of the predictions of a dual-resonance model to our data gave excellent agreement. The differential cross sections at 180° for π±p elastic scattering have been compiled and the moduli and relative phase of the T=12 and T=32 pion-nucleon s- and u-channel amplitudes (|A12|, |A32|, and cosδ) have a minimum at u=0.4 GeV/c and, in the s channel, a corresponding minimum at s=2.2 GeV/c.

53 data tables

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Study of the backward rho- meson production in reaction pi- p ---> p rho- within the incident momentum interval 1.80 to 3.25 gev/c.

Vladimirskii, V.V. ; Dzhelyadin, R.I. ; Dukhovskoi, I.A. ; et al.
Yad.Fiz. 17 (1973) 788-792, 1973.
Inspire Record 85120 DOI 10.17182/hepdata.19251

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1 data table

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Topological and Leading Particle Cross-Sections for 147-GeV/c $\pi^- p$ Interactions.

Fong, D.G. ; Heller, M. ; Shapiro, A.M. ; et al.
Phys.Lett.B 53 (1974) 290-296, 1974.
Inspire Record 93415 DOI 10.17182/hepdata.27916

Results are reported based on a study of π − p interactions at 147 GeV/ c in the FERMILAB 30-inch Proportional Wire Hybrid Bubble Chamber System. We have measured the topological cross sections and separated two-prong elastic and inelastic channels. In addition, we have extracted leading particle cross sections using the increased momentum resolution of the downstream proportional wire chambers. We have compared our results with experiments and predictions of a simple fragmentation hyphothesis.

1 data table

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