Detailed comparison of the pp -> π^+pn and pp -> π^+d reactions at 951 MeV

Abstract

The positively charged pions produced in proton-proton collisions at a beam momentum of 1640 MeV/c were measured in the forward direction with a high resolution magnetic spectrograph. The missing mass distribution shows the bound state (deuteron) clearly separated from the $pn$ continuum. Despite the very good resolution, there is no evidence for any significant production of the $pn$ system in the spin-singlet state. However, the $\sigma (pp\to {\pi }^{+}pn)/\sigma (pp\to {\pi }^{+}d)$ cross section ratio is about twice as large as that predicted from $S$-wave final-state-interaction theory and it is suggested that this is due to $D$-state effects in the $pn$ system.

8 pages, 3 figures

References in corpus (7)

• The high-precision, charge-dependent Bonn nucleon-nucleon potential (CD-Bonn)
• Scattering Wave Functions at Bound State Poles
• Cross section and analyzing power of pol{p}p -> pn pi+ near threshold
• Triplet np Final State Interactions at Large Momentum Transfers
• Observation of strong final-state effects in pi+ production in pp collisions at 400 MeV
• Model-independent analysis of the neutron-proton final-state interaction region in the pp -> pn pi^+ reaction
• Spin-triplet final-state dominance in the pp -> pn pi+ reaction at 492 MeV

Cited by in corpus (6)

• Production of the 1S0 diproton in the pp -> pp pi0 reaction at 0.8 GeV
• Energy dependence of forward 1S0 diproton production in the pp -> pp pi0 reaction
• Impacts of Hawking Radiation from Primordial Black Holes in Critical Collapse Model on the Light Element Abundances
• Precision measurements of the pp\to π^+pn and pp\to π^+d reactions: importance of long-range and tensor force effects
• Comparison of the pp -> pi+ pn and pp -> pi+ d production rates
• Phenomenological study of the pp -> pi+ pn reaction