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 language||American English|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - 10 Sep 2023|
Bibliographical noteFunding Information:
The work of M. Bagnarol, N. Barnea, and M. Schäfer was supported by the Israel Science Foundation grant 1086/21 and by the European Union's Horizon 2020 research and innovation program under grant agreement No 824093 . The work of M.S. was also supported by the Czech Science Foundation GAČR grant 22-14497S . This research was supported in part by the Pazy foundation Grant No. 5067333 .
© 2023 The Author(s)