Polarization observables in low-energy antiproton-proton scattering

Abstract

We investigate the polarization parameters in low-energy antiproton-proton elastic ($\bar{p}p\to \bar{p}p$) and charge-exchange ($\bar{p}p\to \bar{n}n$) scattering. The predictions for unmeasured observables are based on our new energy-dependent partial-wave analysis of all antiproton-proton scattering data below 925 MeV/$c$ antiproton laboratory momentum, which gives an optimal description of the existing database. Sizable and remarkable spin effects are observed, in particular for charge-exchange scattering. These result from the spin dependence of the long- and medium-range one- and two-pion exchange antinucleon-nucleon potential and the state dependence of the parametrized short-range interaction. We study the possibility of polarizing a circulating antiproton beam with a polarized proton target by exploiting the spin dependence of the $\bar{p}p$ total cross section. It appears feasible to achieve a significant transverse polarization of an antiproton beam within a reasonable time.

References in corpus (6)

• Energy-dependent partial-wave analysis of all antiproton-proton scattering data below 925 MeV/c
• Polarizing a stored proton beam by spin flip?
• Spin-dependent part of $p\bar{p}$ interaction cross section and Nijmegen potential
• Spin effects in $p\bar{p}$ interaction and their possible use to polarize antiproton beams
• Spin-dependent pbar-d cross sections at low and intermediate energies
• Spin dependence of the antinucleon-nucleon interaction

Cited by in corpus (5)

• Baryon-number violation by two units and the deuteron lifetime
• Toward polarized antiprotons: Machine development for spin-filtering experiments
• Real and virtual $N\bar{N}$ pair production near the threshold
• Renormalization of One-Pion Exchange in Chiral Effective Field Theory for Antinucleon-Nucleon Scattering
• Elastic pbar-d scattering and total pbar-d cross sections reexamined