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Title: Electromagnetic and neutral-weak response functions of 4He and 12C

Abstract

A major goal of nuclear theory is to understand the strong interaction in nuclei as it manifests itself in terms of two- and many-body forces among the nuclear constituents, the protons and neutrons, and the interactions of these constituents with external electroweak probes via one- and many-body currents. The objective of the present work is to calculate the quasielastic electroweak response functions in light nuclei within the realistic dynamical framework outlined above. These response functions determine the inclusive cross section as function of the lepton momentum and energy transfers. Their ab initio calculation is a very challenging quantum many-body problem, since it requires summation over the entire excitation spectrum of the nucleus and inclusion in the electroweak currents of one- and many-body terms. Green's functions Monte Carlo methods allow one to circumvent both difficulties by computing the response in imaginary time (the so-called Euclidean response) and hence summing implicitly over the bound and continuum states of the nucleus, and by implementing specific algorithms designed to deal with the complicated spin-isospin structure of nuclear many-body operators. Theoretical predictions for 4He and 12C, confirmed by experiment in the electromagnetic case, show that two-body currents generate excess transverse strength from threshold to themore » quasielastic to the dip region and beyond. In conclusion, these results challenge the conventional picture of quasielastic inclusive scattering as being largely dominated by single-nucleon knockout processes.« less

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2];  [1];  [3]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States). Theory Center; Old Dominion Univ., Norfolk, VA (United States). Dept. of Physics
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1406196
Alternate Identifier(s):
OSTI ID: 1184690
Report Number(s):
LA-UR-15-20031
Journal ID: ISSN 0556-2813; TRN: US1702904
Grant/Contract Number:  
AC52-06NA25396; AC02-06CH11357; AC02-05CH11231; AC05-06OR23177
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C, Nuclear Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 6; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Atomic and Nuclear Physics

Citation Formats

Lovato, A., Gandolfi, Stefano, Carlson, Joseph Allen, Pieper, Steven C., and Schiavilla, R. Electromagnetic and neutral-weak response functions of 4He and 12C. United States: N. p., 2015. Web. doi:10.1103/PhysRevC.91.062501.
Lovato, A., Gandolfi, Stefano, Carlson, Joseph Allen, Pieper, Steven C., & Schiavilla, R. Electromagnetic and neutral-weak response functions of 4He and 12C. United States. https://doi.org/10.1103/PhysRevC.91.062501
Lovato, A., Gandolfi, Stefano, Carlson, Joseph Allen, Pieper, Steven C., and Schiavilla, R. Thu . "Electromagnetic and neutral-weak response functions of 4He and 12C". United States. https://doi.org/10.1103/PhysRevC.91.062501. https://www.osti.gov/servlets/purl/1406196.
@article{osti_1406196,
title = {Electromagnetic and neutral-weak response functions of 4He and 12C},
author = {Lovato, A. and Gandolfi, Stefano and Carlson, Joseph Allen and Pieper, Steven C. and Schiavilla, R.},
abstractNote = {A major goal of nuclear theory is to understand the strong interaction in nuclei as it manifests itself in terms of two- and many-body forces among the nuclear constituents, the protons and neutrons, and the interactions of these constituents with external electroweak probes via one- and many-body currents. The objective of the present work is to calculate the quasielastic electroweak response functions in light nuclei within the realistic dynamical framework outlined above. These response functions determine the inclusive cross section as function of the lepton momentum and energy transfers. Their ab initio calculation is a very challenging quantum many-body problem, since it requires summation over the entire excitation spectrum of the nucleus and inclusion in the electroweak currents of one- and many-body terms. Green's functions Monte Carlo methods allow one to circumvent both difficulties by computing the response in imaginary time (the so-called Euclidean response) and hence summing implicitly over the bound and continuum states of the nucleus, and by implementing specific algorithms designed to deal with the complicated spin-isospin structure of nuclear many-body operators. Theoretical predictions for 4He and 12C, confirmed by experiment in the electromagnetic case, show that two-body currents generate excess transverse strength from threshold to the quasielastic to the dip region and beyond. In conclusion, these results challenge the conventional picture of quasielastic inclusive scattering as being largely dominated by single-nucleon knockout processes.},
doi = {10.1103/PhysRevC.91.062501},
journal = {Physical Review C, Nuclear Physics},
number = 6,
volume = 91,
place = {United States},
year = {Thu Jun 04 00:00:00 EDT 2015},
month = {Thu Jun 04 00:00:00 EDT 2015}
}

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