Fate of the neutron–deuteron virtual state as an Efimov level

Gautam Rupak, Akshay Vaghani, Renato Higa, Ubirajara van Kolck

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The emergence of Efimov levels in a three-body system is investigated near the unitarity limit characterized by a resonant two-body interaction. No direct evidence of Efimov levels is seen in the three-nucleon system since the triton is the only physical bound state. We provide a model-independent analysis of nucleon–deuteron scattering at low energy by formulating a consistent effective field theory. We show that virtual states evolve into shallow bound states, which emerge as excited triton levels as we drive the system towards unitarity. Even though we consider this specific system, our results for the emergence of the Efimov levels are universal.

Original languageEnglish (US)
Pages (from-to)414-419
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - Apr 10 2019


  • Efimov levels
  • Neutron–deuteron scattering
  • Nuclear effective field theory

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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