Reactions<i>pd</i><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mo>→</mml:mo></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>He η and<i>pd</i><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mo>→</mml:mo></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>He<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">π</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">−</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>near the η threshold

1996124 citationsJournal Article

Authors

B. Mayer · Commissariat à l'Énergie Atomique et aux Énergies Alternatives

A. Boudard · CEA Paris-Saclay

B. Fabbro · Commissariat à l'Énergie Atomique et aux Énergies Alternatives

M. Garçon · CEA Paris-Saclay

C. Kerboul · Commissariat à l'Énergie Atomique et aux Énergies Alternatives

J. Poitou · CEA Paris-Saclay

F. Wellers

Abstract

The reaction pd${\ensuremath{\rightarrow}}^{3}$He\ensuremath{\eta} has been studied with the SPES2 spectrometer, for proton energies between 0.2 MeV and 11 MeV above threshold. The total cross section rises from 0.25 to 0.40 \ensuremath{\mu}b in this region. The observed energy dependence can be attributed to the strong final state interaction. The angular distribution is nearly isotropic, consistent with S wave production. A measurement of the pd${\ensuremath{\rightarrow}}^{3}$He${\mathrm{\ensuremath{\pi}}}^{+}$${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$ cross section in the threshold region is also presented. The setup, which is capable of producing ${10}^{5}$ tagged \ensuremath{\eta}/s with only a few percent background, is used to investigate rare \ensuremath{\eta} decays. \textcopyright{} 1996 The American Physical Society.

Topics & Keywords

Quantum, superfluid, helium dynamics Atomic and Subatomic Physics Research Quantum Chromodynamics and Particle Interactions

Publication Details

Published in: Physical Review C

Volume 53, Issue 5, pp. 2068-2074

DOI: 10.1103/physrevc.53.2068

Field-Weighted Citation Impact: 1.55

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