Neutron Charge Density from Simple Pion Cloud Models
Jun, 20098 pages
Published in:
- Phys.Rev.C 80 (2009) 025206
e-Print:
- 0906.5020 [nucl-th]
Report number:
- NT@UW-09-14
Citations per year
Abstract: (arXiv)
The physical nucleon is modeled as a bare nucleon surrounded by a pion cloud using a psuedoscalar pion-nucleon coupling to examine its implications for the neutron form factor, F_1, and the corresponding transverse charge density in the infinite momentum frame. Two versions, one with a tunable Pauli-Villars parameter, and one with light-front cloudy-bag pion-nucleon form factors, are examined. A qualitative agreement with the experimental form factor (negative definite for all Q^2) and transverse charge density are achieved when the nucleon is treated as having a finite extent. The bare nucleon must have a finite extent if this model is to account for a negative definite F_1, and consequently a negative transverse charge density of the neutron at its center.- 13.40.Gp
- 14.20.Dh
References(17)
Figures(5)
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