TL;DR
This paper models the deuteron using meson exchange potentials, highlighting the importance of sigma(600) and omega(783) exchanges, and shows that slight changes in potential can unbind the deuteron, providing an anthropic constraint.
Contribution
It introduces a meson exchange model including sigma(600) and omega(783) to describe deuteron binding, emphasizing the sensitivity to potential variations.
Findings
Deuteron binding mainly due to sigma(600) and omega(783) exchange.
A 6% decrease in sigma(600) potential unbinds the deuteron.
Potential sensitivity constrains the stability of the deuteron.
Abstract
We consider a description of the deuteron based on meson exchange potentials. A key feature is the inclusion of the I=S=0 two-pion intermediate state ('sigma(600)') as a significant component of the inter-nucleon potential energy. In this approach, deuteron binding is seen to be predominantly a consequence of sigma(600) and omega(783) exchange, with a secondary tole played by rho(770). We explore sensitivity of two-nucleon binding to changes in the potential and thereby obtain an anthropic constraint -- that the deuteron unbinds for a modest decrease (about 6%) in the attractive sigma(600) potential.
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Taxonomy
TopicsNuclear physics research studies · Quantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies