Low-energy theorems for nucleon-nucleon scattering at unphysical pion masses

Abstract

The longest-range part of the nuclear force due to the one-pion exchange governs the energy dependence of the scattering amplitude in the near-threshold region and imposes correlations between the coefficients in the effective range expansion. These correlations may be regarded as low-energy theorems and are known to hold to a high accuracy in the neutron-proton 3S1 partial wave. We generalize the low-energy theorems to the case of unphysical pion masses and provide results for the correlations between the coefficients in the effective range expansion in this partial wave for pion masses up to Mpi ~ 400 MeV. We discuss the implications of our findings for the available and upcoming lattice-QCD simulations of two-nucleon observables.

arXiv comment17 pages, 7 figures, 3 tables

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• The long and winding road from chiral effective Lagrangians to nuclear structure
• Low-energy Scattering and Effective Interactions of Two Baryons at $m_{\pi }\sim 450$ MeV from Lattice Quantum Chromodynamics
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• Producing the Deuteron in Stars: Anthropic Limits on Fundamental Constants
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• The Coulomb interaction in Helium-3: Interplay of strong short-range and weak long-range potentials
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• Improved Constraints on the Variation of the Weak Scale from Big Bang Nucleosynthesis