Unbinding the Deuteron

Details Unbinding the Deuteron Unbinding the Deuteron

2008-03-23

arxiv.org/abs/0803.3329v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

References added; Conclusion slightly expanded

Scientific paper

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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