Achievements and challenges in understanding nucleon-deuteron reactions

Witała, H. and Golak, J. and Skibiński, R. and Topolnicki, K. (2019) Achievements and challenges in understanding nucleon-deuteron reactions. Il nuovo cimento C, 42 (2-3). pp. 1-4. ISSN 1826-9885

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Results on three-nucleon (3N) elastic scattering below the pion production threshold are discussed with an emphasis on a need for a three-nucleon force (3NF). The large discrepancies found between a theory based on numerical solutions of 3N Faddeev equations with (semi) phenomenological nucleon-nucleon (NN) potentials only and data point to the need for 3NF’s. This notion is supported by the fact that another possible reason for the discrepancies in elastic nucleondeuteron (Nd) scattering, relativistic effects, turned out to be small. Results based on a new generation of chiral NN forces (up to N4LO) alone or combined with N2LO 3NF support predictions found with standard interactions. To resolve higher energy discrepancies found in nucleon-deuteron (Nd) reactions requires application of a chiral 3NF up to at least N3LO order of chiral expansion.

Item Type: Article
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 01 Dec 2020 08:49
Last Modified: 01 Dec 2020 08:49

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