High Statistics $\Sigma p$ Scattering Experiment Using High Intensity Pion Beams at J-PARC
Résumé
In order to test theoretical frameworks of the baryon–baryon (BB) interactions and to confirm the “Pauli effect between quarks” for the first time, we have proposed an experiment (J-PARC E40) to measure low-energy hyperon–proton scattering cross sections of the Σ^+p, Σ^−p elastic scatterings and the Σ^−p → Λn inelastic scattering in the momentum range of 400 < p (MeV/c) < 700 in the laboratory system. Experimentally, we detect two successive reactions of the Σ production (π^±p → K^+Σ^±) and the Σp scattering (Σp → Σp) in the same liquid hydrogen target. The former is measured with two magnetic spectrometers, and the latter with a scattered proton detector (CATCH). By using a high intensity π beam, we estimate that more than 10,000 scattering events can be identified. In this experiment, we aim to provide good quality scattering data to test the theoretical models of the BB interaction.
Mots clés
Hyperon proton scattering
$\Sigma$N interaction
pi: beam
Sigma: production
hydrogen: liquid: target
scattering
J-PARC Lab
magnetic spectrometer
baryon baryon: interaction
statistics
Pauli principle
p hyperon: elastic scattering
p hyperon: inelastic scattering
Sigma p --> Sigma p
Sigma- p --> Lambda n
pi p --> K Sigma