Local chiral interactions and magnetic structure of few-nucleon systems
- Old Dominion Univ., Norfolk, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Univ. of South Carolina, Columbia, SC (United States)
- Washington Univ. in St. Louis, St. Louis, MO (United States)
- Univ. of Salento, Lecce (Italy); INFN-Lecce, Lecce (Italy)
- INFN-Pisa, Pisa (Italy)
- Argonne National Lab. (ANL), Argonne, IL (United States); INFN-TIFPA, Trento (Italy)
- Univ. of Pisa, Pisa (Italy); INFN-Pisa, Pisa (Italy)
- Argonne National Lab. (ANL), Argonne, IL (United States)
The magnetic form factors of 2H, 3 H, and 3He, deuteron photodisintegration cross sections at low energies, and deuteron threshold electrodisintegration cross sections at backward angles in a wide range of momentum transfers, are calculated with the chiral two-nucleon (and three-nucleon) interactions including intermediate states that have recently been constructed in configuration space. The = 3 wave functions are obtained from hyperspherical-harmonics solutions of the Schrödinger equation. The electromagnetic current includes one- and two-body terms, the latter induced by one- and two-pion exchange (OPE and TPE, respectively) mechanisms and contact interactions. The contributions associated with intermediate states are only retained at the OPE level, and are neglected in TPE loop (tree-level) corrections to two-body (three-body) current operators. Expressions for these currents are derived and regularized in configuration space for consistency with the interactions. The low-energy constants that enter the contact few-nucleon systems. The predicted form factors and deuteron electrodisintegration cross section are in excellent agreement with experiment for momentum transfers up to 2--3 fm . However, the experimental values for the deuteron photodisintegration cross section are consistently underestimated by theory, unless use is made of the Siegert form of the electric dipole transition operator. A complete analysis of the results is provided, including the clarification of the origin of the aforementioned discrepancy.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Michigan State Univ., East Lansing, MI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- AC02-06CH11357; AC05-06OR23177; SC0010300; SC0013617
- OSTI ID:
- 1504274
- Alternate ID(s):
- OSTI ID: 1502270; OSTI ID: 1505127; OSTI ID: 1542955; OSTI ID: 1607434
- Report Number(s):
- JLAB-THY-18-2807; arXiv:1809.10180; DOE/OR/23177-4541; PRVCAN; 147415
- Journal Information:
- Physical Review C, Vol. 99, Issue 3; ISSN 2469-9985
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Local Nucleon-Nucleon and Three-Nucleon Interactions Within Chiral Effective Field Theory
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journal | January 2020 |
Local nucleon-nucleon and three-nucleon interactions within chiral effective field theory | text | January 2020 |
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