ELECTROMAGNETIC PROCESSES IN $$\chi$$EFT
Conference
·
OSTI ID:956215
Nuclear electromagnetic currents derived in a chiral-effective-field-theory framework including explicit nucleons, $$\Delta$$ isobars, and pions up to N$^2$$LO, {\it i.e.} ignoring loop corrections, are used in a study of neutron radiative captures on protons and deuterons at thermal energies, and of $$A$$=2 and 3 nuclei magnetic moments. With the strengths of the $$\Delta$$-excitation currents determined to reproduce the $$n$$-$$p$$ cross section and isovector combination of the trinucleon magnetic moments, we find that the cross section and photon circular polarization parameter, measured respectively in $$n$$-$$d$$ and $$\vec{n}$$-$$d$ processes, are significantly underpredicted by theory.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-060R23177
- OSTI ID:
- 956215
- Report Number(s):
- JLAB-THY-08-878; arXiv:0809.2555; DOE/OR/23177-0492; TRN: US1004944
- Resource Relation:
- Conference: Invited Talk compiled for Fourth Asia-Pacific Conference on Few-Body Problems in Physics
- Country of Publication:
- United States
- Language:
- English
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