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 - Článek v odborném periodiku
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
Grant CEP: GA ČR(CZ) GA22-14497S
Institucionální podpora: RVO:61389005
Klíčová slova: He-4 * scattering
Obor OECD: Particles and field physics
Impakt faktor: 4.3, rok: 2022
Způsob publikování: 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.
Trvalý link: https://hdl.handle.net/11104/0344959