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

0575102 - ÚJF 2024 RIV NL eng J - Journal Article
Bagnarol, M. - Schäfer, Martin - Bazak, B. - Barnea, N.
Five-body calculation of s-wave n-⁴He scattering at next-to-leading order pionless effective field theory.
Physics Letters. B. Roč. 844, SEP (2023), č. článku 138078. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA ČR(CZ) GA22-14497S
Institutional support: RVO:61389005
Keywords : He-4 * scattering
OECD category: Particles and field physics
Impact factor: 4.3, year: 2022
Method of publishing: Open access
https://doi.org/10.1016/j.physletb.2023.138078

We present the first five-body calculations of s-wave n-He-4 scattering within leading order and next-toleading order (NLO) pionless effective field theory (pi/EFT). Using an harmonic oscillator trap technique and pi/EFT fitted to just six well-established experimental parameters, we predict the s-wave n-He-4 phase shifts, scattering length a(n4He)(1/2)( NLO) = 2.47(4 num.)(17 theor.) fm, and effective range r(n4He)(1/2)( NLO) = 1.384(3 num.)(211 theor.) fmin 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.
Permanent Link: https://hdl.handle.net/11104/0344959