Ab initio manybody calculations of nucleon ^{4}He scattering with threenucleon forces
We extend the ab initio nocore shell model/resonatinggroup method to include threenucleon (3N) interactions for the description of nucleonnucleus collisions. We outline the formalism, give algebraic expressions for the 3Nforce integration kernels, and discuss computational aspects of two alternative implementations. The extended theoretical framework is then applied to nucleon ^{4}He elastic scattering using similarityrenormalizationgroup (SRG)evolved nucleonnucleon plus 3N potentials derived from chiral effective field theory. We analyze the convergence properties of the calculated phase shifts and explore their dependence upon the SRG evolution parameter. We include up to six excited states of the ^{4}He target and find significant effects from the inclusion of the chiral 3N force, e.g., it enhances the spinorbit splitting between the 3/2 ^{–} and 1/2 ^{–} resonances and leads to an improved agreement with the phase shifts obtained from an accurate Rmatrix analysis of the fivenucleon experimental data. As a result, we find remarkably good agreement with measured differential cross sections at various energies below the d+ ^{3}H threshold, while analyzing powers manifest larger deviations from experiment for certain energies and angles.
 Authors:

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 Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
 Univ. Darmstadt, Darmstadt (Germany)
 TRIUMF, Vancouver, BC (Canada)
 Publication Date:
 Report Number(s):
 LLNLJRNL641544
Journal ID: ISSN 05562813; PRVCAN
 Grant/Contract Number:
 AC5207NA27344
 Type:
 Accepted Manuscript
 Journal Name:
 Physical Review. C, Nuclear Physics
 Additional Journal Information:
 Journal Volume: 88; Journal Issue: 5; Journal ID: ISSN 05562813
 Publisher:
 American Physical Society (APS)
 Research Org:
 Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
 Sponsoring Org:
 USDOE
 Country of Publication:
 United States
 Language:
 English
 Subject:
 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
 OSTI Identifier:
 1245723
Hupin, Guillaume, Langhammer, Joachim, Navratil, Petr, Quaglioni, Sofia, Calci, Angelo, and Roth, Robert. Ab initio manybody calculations of nucleon4He scattering with threenucleon forces. United States: N. p.,
Web. doi:10.1103/PhysRevC.88.054622.
Hupin, Guillaume, Langhammer, Joachim, Navratil, Petr, Quaglioni, Sofia, Calci, Angelo, & Roth, Robert. Ab initio manybody calculations of nucleon4He scattering with threenucleon forces. United States. doi:10.1103/PhysRevC.88.054622.
Hupin, Guillaume, Langhammer, Joachim, Navratil, Petr, Quaglioni, Sofia, Calci, Angelo, and Roth, Robert. 2013.
"Ab initio manybody calculations of nucleon4He scattering with threenucleon forces". United States.
doi:10.1103/PhysRevC.88.054622. https://www.osti.gov/servlets/purl/1245723.
@article{osti_1245723,
title = {Ab initio manybody calculations of nucleon4He scattering with threenucleon forces},
author = {Hupin, Guillaume and Langhammer, Joachim and Navratil, Petr and Quaglioni, Sofia and Calci, Angelo and Roth, Robert},
abstractNote = {We extend the ab initio nocore shell model/resonatinggroup method to include threenucleon (3N) interactions for the description of nucleonnucleus collisions. We outline the formalism, give algebraic expressions for the 3Nforce integration kernels, and discuss computational aspects of two alternative implementations. The extended theoretical framework is then applied to nucleon4He elastic scattering using similarityrenormalizationgroup (SRG)evolved nucleonnucleon plus 3N potentials derived from chiral effective field theory. We analyze the convergence properties of the calculated phase shifts and explore their dependence upon the SRG evolution parameter. We include up to six excited states of the 4He target and find significant effects from the inclusion of the chiral 3N force, e.g., it enhances the spinorbit splitting between the 3/2– and 1/2– resonances and leads to an improved agreement with the phase shifts obtained from an accurate Rmatrix analysis of the fivenucleon experimental data. As a result, we find remarkably good agreement with measured differential cross sections at various energies below the d+3H threshold, while analyzing powers manifest larger deviations from experiment for certain energies and angles.},
doi = {10.1103/PhysRevC.88.054622},
journal = {Physical Review. C, Nuclear Physics},
number = 5,
volume = 88,
place = {United States},
year = {2013},
month = {11}
}