Five-body calculation of s-wave n-4He scattering at next-to-leading order pionless effective field theory

Mirko Bagnarol, Martin Schäfer*, Betzalel Bazak, Nir Barnea

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We present the first five-body calculations of s-wave n-4He scattering within leading order and next-to-leading order (NLO) pionless effective field theory (π̸EFT). Using an harmonic oscillator trap technique and π̸EFT fitted to just six well-established experimental parameters, we predict the s-wave n-4He phase shifts, scattering length an4He 1/2(NLO)=2.47(4num.)(17theor.)fm, and effective range rn4He 1/2(NLO)=1.384(3num.)(211theor.)fm in agreement with experiment. The apparent cutoff independence of our results is used to estimate the theoretical errors coming as an integral part of our final results.

Original languageAmerican English
Article number138078
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume844
DOIs
StatePublished - 10 Sep 2023

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