Identification of the $D + P \to ^{3}$He + $\eta$ Reaction Very Near Threshold: Cross-section and Deuteron Tensor Analyzing Power

Berger, J.; Boivin, M.; Boudard, A.; Fleury, P.; Germond, J.F.; Goldzahl, L.; Kerboul, Cl.; Mayer, B.; Plouin, F.; Satta, L.

doi:10.1103/PhysRevLett.61.919

Identification of the $D + P \to ^{3}$ He + $\eta$ Reaction Very Near Threshold: Cross-section and Deuteron Tensor Analyzing Power

1988

4 pages

Published in:

Phys.Rev.Lett. 61 (1988) 919-922

DOI:

10.1103/PhysRevLett.61.919

Experiments:

SATURNE-157

View in:

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Citations per year

Abstract: (APS)

From the interactions of a deuteron beam in a liquid-hydrogen target at energies near the d+p→He3+η threshold, η events were selected on the basis of the momentum-analyzed He3 with a background of less than 2%. This opens the way to a He3-tagged η beam at Saturne, with a possible flux of 104-105 η's per pulse. The present data allow an evaluation of the cross section down to less than 0.5 MeV above threshold. The deuteron tensor analyzing power t20 has also been measured: The small negative value found at threshold (-0.15 ± 0.05) seems incompatible with models based on one-pion exchange.

P DEUTERON: NUCLEAR REACTION
ETA: HADROPRODUCTION
HADROPRODUCTION: ETA
POLARIZATION: ANALYZING POWER
ANALYZING POWER: POLARIZATION
POLARIZATION: TENSOR
TENSOR: POLARIZATION
MOMENTUM SPECTRUM: (HELIUM)
SPECTROMETER: EXPERIMENTAL RESULTS
SACLAY PS

References(6)

Figures(0)

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Identification of the D+P→3D + P \to ^{3}D+P→3He + η\etaη Reaction Very Near Threshold: Cross-section and Deuteron Tensor Analyzing Power

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