Microscopic Optical Potentials from First Principles

J. Rotureau; P. Danielewicz; G. Hagen; G. Jansen; F. Nunes; T. Papenbrock

doi:10.1007/978-3-030-32357-8_32

Microscopic Optical Potentials from First Principles

J. Rotureau, P. Danielewicz, G. Hagen, G. Jansen, F. Nunes, T. Papenbrock

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Scopus citations

Abstract

We construct nucleonic microscopic optical potentials by combining the Green’s function approach with the coupled-cluster method for (formula presented) and (formula presented). We work with the chiral nucleon-nucleon and three-nucleon interaction (formula presented) which reproduces the charge radii of (formula presented)Ca and (formula presented)Ca. The overall form of the neutron scattering cross section is reproduced for both nuclei, but the imaginary part of the calculated potential, which reflects the loss of flux in the elastic channel, is negligible. The latter points to many-body correlations that would appear beyond the coupled-cluster truncation level considered in this work. We show that, by artificially increasing the parameter (formula presented) in the Green’s function, practical results can be further improved.

Original language	English
Title of host publication	Recent Progress in Few-Body Physics - Proceedings of the 22nd International Conference on Few-Body Problems in Physics, FB22 2018
Editors	N.A. Orr, F.M. Marqués, M. Ploszajczak, J. Carbonell
Publisher	Springer
Pages	183-190
Number of pages	8
ISBN (Print)	9783030323561
DOIs	https://doi.org/10.1007/978-3-030-32357-8_32
State	Published - 2020
Event	22nd International Conference on Few-Body Problems in Physics, FB22 2018 - Caen, France Duration: Jul 9 2018 → Jul 13 2018

Publication series

Name	Springer Proceedings in Physics
Volume	238
ISSN (Print)	0930-8989
ISSN (Electronic)	1867-4941

Conference

Conference	22nd International Conference on Few-Body Problems in Physics, FB22 2018
Country/Territory	France
City	Caen
Period	07/9/18 → 07/13/18

Funding

Acknowledgements We thank K. Hebeler for providing us with matrix elements in Jacobi coordinates for the NNN interaction at next-to-next-to-leading order. This work was supported by the National Science Foundation under Grant PHY-1403906, the Department of Energy under Contract No. DE-FG52-08NA28552, by the Office of Science, U.S. Department of Energy under Award Number DE-SC0013365 and by the Office of Nuclear Physics, U.S. Department of Energy, under Grants DE-SC0008499 (SciDAC-3 NUCLEI), DE-SC0018223 (SciDAC-4 NUCLEI), the Field Work Proposal ERKBP57 and ERKBP72 at Oak Ridge National Laboratory (ORNL). An award of computer time was provided by the Institute for Cyber-Enabled Research at Michigan State University and part of this research used resources of the Oak Ridge Leadership Computing Facility located at ORNL, which is supported by the Office of Science of the Department of Energy under Contract No. DE-AC05-00OR22725. We thank K. Hebeler for providing us with matrix elements in Jacobi coordinates for the NNN interaction at next-to-next-to-leading order. This work was supported by the National Science Foundation under Grant PHY-1403906, the Department of Energy under Contract No. DE-FG52-08NA28552, by the Office of Science, U.S. Department of Energy under Award Number DE-SC0013365 and by the Office of Nuclear Physics, U.S. Department of Energy, under Grants DE-SC0008499 (SciDAC-3 NUCLEI), DE-SC0018223 (SciDAC-4 NUCLEI), the Field Work Proposal ERKBP57 and ERKBP72 at Oak Ridge National Laboratory (ORNL). An award of computer time was provided by the Institute for Cyber-Enabled Research at Michigan State University and part of this research used resources of the Oak Ridge Leadership Computing Facility located at ORNL, which is supported by the Office of Science of the Department of Energy under Contract No. DE-AC05-00OR22725.

Funders	Funder number
Institute for Cyber-Enabled Research at Michigan State University
Office of Nuclear Physics
Office of Science of the Department of Energy	DE-AC05-00OR22725
National Science Foundation	PHY-1403906
U.S. Department of Energy	DE-FG52-08NA28552, DE-SC0013365
Office of Science
Nuclear Physics	DE-SC0018223, DE-SC0008499
Oak Ridge National Laboratory

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10.1007/978-3-030-32357-8_32

Cite this

Rotureau, J., Danielewicz, P., Hagen, G., Jansen, G., Nunes, F., & Papenbrock, T. (2020). Microscopic Optical Potentials from First Principles. In N. A. Orr, F. M. Marqués, M. Ploszajczak, & J. Carbonell (Eds.), Recent Progress in Few-Body Physics - Proceedings of the 22nd International Conference on Few-Body Problems in Physics, FB22 2018 (pp. 183-190). (Springer Proceedings in Physics; Vol. 238). Springer. https://doi.org/10.1007/978-3-030-32357-8_32

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abstract = "We construct nucleonic microscopic optical potentials by combining the Green{\textquoteright}s function approach with the coupled-cluster method for (formula presented) and (formula presented). We work with the chiral nucleon-nucleon and three-nucleon interaction (formula presented) which reproduces the charge radii of (formula presented)Ca and (formula presented)Ca. The overall form of the neutron scattering cross section is reproduced for both nuclei, but the imaginary part of the calculated potential, which reflects the loss of flux in the elastic channel, is negligible. The latter points to many-body correlations that would appear beyond the coupled-cluster truncation level considered in this work. We show that, by artificially increasing the parameter (formula presented) in the Green{\textquoteright}s function, practical results can be further improved.",

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Rotureau, J, Danielewicz, P, Hagen, G , Jansen, G, Nunes, F & Papenbrock, T 2020, Microscopic Optical Potentials from First Principles. in NA Orr, FM Marqués, M Ploszajczak & J Carbonell (eds), Recent Progress in Few-Body Physics - Proceedings of the 22nd International Conference on Few-Body Problems in Physics, FB22 2018. Springer Proceedings in Physics, vol. 238, Springer, pp. 183-190, 22nd International Conference on Few-Body Problems in Physics, FB22 2018, Caen, France, 07/9/18. https://doi.org/10.1007/978-3-030-32357-8_32

Microscopic Optical Potentials from First Principles. / Rotureau, J.; Danielewicz, P.; Hagen, G. et al.
Recent Progress in Few-Body Physics - Proceedings of the 22nd International Conference on Few-Body Problems in Physics, FB22 2018. ed. / N.A. Orr; F.M. Marqués; M. Ploszajczak; J. Carbonell. Springer, 2020. p. 183-190 (Springer Proceedings in Physics; Vol. 238).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Danielewicz, P.

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N2 - We construct nucleonic microscopic optical potentials by combining the Green’s function approach with the coupled-cluster method for (formula presented) and (formula presented). We work with the chiral nucleon-nucleon and three-nucleon interaction (formula presented) which reproduces the charge radii of (formula presented)Ca and (formula presented)Ca. The overall form of the neutron scattering cross section is reproduced for both nuclei, but the imaginary part of the calculated potential, which reflects the loss of flux in the elastic channel, is negligible. The latter points to many-body correlations that would appear beyond the coupled-cluster truncation level considered in this work. We show that, by artificially increasing the parameter (formula presented) in the Green’s function, practical results can be further improved.

AB - We construct nucleonic microscopic optical potentials by combining the Green’s function approach with the coupled-cluster method for (formula presented) and (formula presented). We work with the chiral nucleon-nucleon and three-nucleon interaction (formula presented) which reproduces the charge radii of (formula presented)Ca and (formula presented)Ca. The overall form of the neutron scattering cross section is reproduced for both nuclei, but the imaginary part of the calculated potential, which reflects the loss of flux in the elastic channel, is negligible. The latter points to many-body correlations that would appear beyond the coupled-cluster truncation level considered in this work. We show that, by artificially increasing the parameter (formula presented) in the Green’s function, practical results can be further improved.

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Rotureau J, Danielewicz P, Hagen G , Jansen G, Nunes F, Papenbrock T. Microscopic Optical Potentials from First Principles. In Orr NA, Marqués FM, Ploszajczak M, Carbonell J, editors, Recent Progress in Few-Body Physics - Proceedings of the 22nd International Conference on Few-Body Problems in Physics, FB22 2018. Springer. 2020. p. 183-190. (Springer Proceedings in Physics). doi: 10.1007/978-3-030-32357-8_32

Microscopic Optical Potentials from First Principles

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