HEPData Search

pp interactions at 11 momenta in the range 0.9 to 2.0 GeV/ c have been studied. The elastic angular distributions, covering the c.m. angular range 22°–90°, agree in general with Hoshizaki's phase-shift analysis which shows the looping 1 D in and 3 F 3 amplitudes in the Argand diagram. About 80% of pn π + events come from the n Δ ++ state at all momenta above 1.2 GeV/ c . The behavior of the density matrix elements of the Δ ++ show no momentum or angular dependence. A large fraction of pp π 0 events also come from the p Δ + state at all momenta above 1.2 GeV/ c . The behavior of the Δ + density matrix elements is similar to that for the case of Δ ++ .

3 data tables

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CROSS-SECTION ASYMMETRY OF THE gamma n ---> pi- p REACTION BY POLARIZED PHOTONS IN THE THIRD AND FOURTH RESONANCE REGIONS

Adamian, F.V. ; Akopian, G.G. ; Galumian, P.I. ; et al.

EFI-722-37-84-YEREVAN, 1984.

Inspire Record 206944 DOI 10.17182/hepdata.18433

None

5 data tables

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A STUDY OF THE REACTION anti-p n ---> pi- pi- pi+ AT CENTER-OF-MASS ENERGIES BETWEEN 1.9-GeV AND 2.3-GeV

Darling, T. ; Opat, G.I. ; Tovey, S.N. ; et al.

Nuovo Cim.A 79 (1984) 181, 1984.

Inspire Record 14076 DOI 10.17182/hepdata.37516

We have studied the reactions$\bar pn \to \pi ^ -\pi ^ -\pi ^ +(\pi ^0 )$ at incident momenta between 0.42 and 1.65 GeV/c using two exposures in deuterium-filled bubble chambers. The ratio of the rates for 3π to 4π final states shows a sharp increase at a momentum of about 0.8 GeV/c. A full partial-wave analysis of the 3π final state has been made and complex structure is observed at approximately the same momentum, associated in particular with theJP=3+ final state.

2 data tables

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Isospin invariance in the reaction n p ---> pi0 d

Wilson, S.S. ; Longo, M.J. ; Young, K.K. ; et al.

Nucl.Phys.B 33 (1971) 253-280, 1971.

Inspire Record 68508 DOI 10.17182/hepdata.33111

A measurement of the differential cross section for the reaction np→ π 0 d has been made at the Lawrence Radiation Laboratory 184-inch cyclotron. A neutron beam with kinetic energies up to 720 MeV was incident on a liquid hydrogen target. The angle and momentum of the deuterons were measured using an analyzing magnet and wire spark chambers with a magnetostrictive readout. Deuterons were separated from protons by time-of-flight. The photons from the decaying π 0 were not detected. The neutron energy was calculated from the measured deuteron angle and momentum.

9 data tables

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Measurements of Cross-section Asymmetry by Polarized Photons and Models of Eta0 Meson Photoproduction in the Energy Range $E_\gamma = 1$-{GeV} to 2-{GeV}

Vartapetian, G.A. ; Piliposian, S.E. ;

Sov.J.Nucl.Phys. 32 (1980) 804, 1980.

Inspire Record 154948 DOI 10.17182/hepdata.18828

None

20 data tables

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Axis error includes +- 16/16 contribution.

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The photoproduction of eta mesons at small angles

Booth, P.S.L. ; Barton, J.S. ; Carroll, L.J. ; et al.

Nucl.Phys.B 25 (1971) 510-518, 1971.

Inspire Record 68819 DOI 10.17182/hepdata.33806

None

4 data tables

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Further evidence for the decay mode phi ---> eta gamma and measurement of the branching ratio gamma(phi ---> eta gamma)/gamma(phi ---> total)

Basile, M. ; Dalpiaz, P. ; Frabetti, P.L. ; et al.

Nucl.Phys.B 44 (1972) 605-617, 1972.

Inspire Record 75023 DOI 10.17182/hepdata.32854

The reaction π − p → ηφ has been studied at 1.8 GeV/ c incident pion momentum using the Bologna-CERN NBC set-up, in order to investigate the electromagnetic decay mode φ → ηγ . We observed (27 ± 6) events, yielding a branching ratio Γ(φ → ηγ) Γ(φ → total ) = (7.3 ± 1.9)% . The theoretical implications of this result are discussed.

1 data table

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ASSUMING THE TOTAL PHI CROSS SECTION IS 35 +- 5 MUB, THIS YIELDS THE BRANCHING RATIO OF (7.3 +- 1.9) PCT FOR PHI --> ETA GAMMA.

Electron-Proton Scattering at High Momentum Transfers

Chen, K.W. ; Cone, A.A. ; Dunning, J.R. ; et al.

Phys.Rev.Lett. 11 (1963) 561-564, 1963.

Inspire Record 945163 DOI 10.17182/hepdata.21832

None

4 data tables

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USE OF PI P ---> PI PI N REACTIONS TO STUDY PI PI SCATTERING IN THE ELASTIC INTERACTION REGION

Resonance states, including exotics in reactions pi+ p ---> n 4 pi+ 2 pi- at 4.2-GeV/c beam momentum

Study of $p p$ Interactions in the Momentum Range 0.9-{GeV}/$c$ to 2.0-{GeV}/$c$

CROSS-SECTION ASYMMETRY OF THE gamma n ---> pi- p REACTION BY POLARIZED PHOTONS IN THE THIRD AND FOURTH RESONANCE REGIONS

A STUDY OF THE REACTION anti-p n ---> pi- pi- pi+ AT CENTER-OF-MASS ENERGIES BETWEEN 1.9-GeV AND 2.3-GeV

Isospin invariance in the reaction n p ---> pi0 d

Measurements of Cross-section Asymmetry by Polarized Photons and Models of Eta0 Meson Photoproduction in the Energy Range $E_\gamma = 1$-{GeV} to 2-{GeV}

The photoproduction of eta mesons at small angles

Further evidence for the decay mode phi ---> eta gamma and measurement of the branching ratio gamma(phi ---> eta gamma)/gamma(phi ---> total)

Electron-Proton Scattering at High Momentum Transfers