Extracting Nucleon Magnetic Moments and Electric Polarizabilities from Lattice QCD in Background Electric Fields

Journal Article · Mon Mar 01 04:00:00 EST 2010 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.81.054502· OSTI ID:982216

Tiburzi, Brian C. ^[1]; Walker-Loud, Andre ^[2]

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1. Univ. of Maryland, College Park, MD (United States)
2. College of William and Mary, Williamsburg, VA (United States)

Nucleon properties are investigated in background electric fields. As the magnetic moments of baryons affect their relativistic propagation in constant electric fields, electric polarizabilities cannot be determined without knowledge of magnetic moments. We devise combinations of baryon two-point functions in external electric fields to isolate both observables. Using an ensemble of anisotropic gauge configurations with dynamical clover fermions, we demonstrate how magnetic moments and electric polarizabilities can be determined from lattice QCD simulations in background electric fields. We obtain results for both the neutron and proton. Our study is currently limited to electrically neutral sea quarks.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 982216
• Report Number(s): JLAB-THY-09-1111; DOE/OR/23177-1059
• Journal Information: Physical Review D, Journal Name: Physical Review D Journal Issue: 05 Vol. 81; ISSN PRVDAQ; ISSN 1550-7998
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
CLOVER
ELECTRIC FIELDS
FERMIONS
FUNCTIONS
MAGNETIC MOMENTS
NEUTRONS
NUCLEONS
QUANTUM CHROMODYNAMICS
QUARKS
SEAS