Proton Electromagnetic Form Factor Ratios at Low Q**2 - INSPIRE

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Proton Electromagnetic Form Factor Ratios at Low Q**2

Gerald A. Miller
(
- Washington U., Seattle
)
,
E. Piasetzky
(
- Tel Aviv U.
)
,
G. Ron
(
- Tel Aviv U.
)

Nov, 2007

4 pages

Published in:

Phys.Rev.Lett. 101 (2008) 082002

e-Print:

0711.0972 [nucl-th]

DOI:

10.1103/PhysRevLett.101.082002

Report number:

NT@UW-07-16

View in:

ADS Abstract Service

reference search33 citations

Citations per year

Abstract: (arXiv)

The physical interpretation of a measurement of the ratio

R\equiv\mu G_E(Q^2)/G_M(Q^2)

of the proton at very small values of

Q^2

is presented. Radii commonly associated with these form factors are not moments of charge or magnetization densities. We show that the form factor

F_2

is correctly interpretable as the two-dimensional Fourier transformation of a magnetization density. A relationship between the measurable ratio and moments of true charge and magnetization densities is derived. We find that existing measurements show that the magnetization density extends further than the charge density, in contrast with expectations based on the measured reduction of

R

as

Q^2

increases.

13.60.-r
13.40.Em
13.40.Gp
14.20.Dh
form factors
charge densities
p: form factor
form factor: electric
form factor: magnetic
form factor: ratio

References(35)

Figures(0)

Nucleon electromagnetic form-factors

Hai-yan Gao
(
- TUNL, Durham and
- Duke U. and
- MIT, LNS
)

- Int.J.Mod.Phys.E 12 (2003) 1-40,
- Int.J.Mod.Phys.E 12 (2003) 567 (erratum)
•
e-Print:
- nucl-ex/0301002
•
DOI:
- 10.1142/S021830130300117X

Nucleon Electromagnetic Form Factors

C.F. Perdrisat
(
- William-Mary Coll.
)
,
V. Punjabi
(
- Norfolk State U.
)
,
M. Vanderhaeghen
(
- Jefferson Lab and
- William-Mary Coll.
)

- Prog.Part.Nucl.Phys. 59 (2007) 694-764
•
e-Print:
- hep-ph/0612014
•
DOI:
- 10.1016/j.ppnp.2007.05.001

Nucleon electromagnetic form-factors

- J.Phys.G 34 (2007) S23-S52
•
e-Print:
- nucl-th/0611050
•
DOI:
- 10.1088/0954-3899/34/7/S03

Electromagnetic form factors of the nucleon and Compton scattering

Charles Earl Hyde
(
- Old Dominion U.
)
,
Kees de Jager
(
- Jefferson Lab
)

- Ann.Rev.Nucl.Part.Sci. 54 (2004) 217-267
•
e-Print:
- nucl-ex/0507001
•
DOI:
- 10.1146/annurev.nucl.53.041002.110443

The Parton Model and the Bethe-Salpeter Wave Function

Davison E. Soper
(
- Princeton U.
)

- Phys.Rev.D 15 (1977) 1141
•
DOI:
- 10.1103/PhysRevD.15.1141

Impact parameter space interpretation for generalized parton distributions

Matthias Burkardt
(
- New Mexico State U.
)

- Int.J.Mod.Phys.A 18 (2003) 173-208
•
e-Print:
- hep-ph/0207047
•
DOI:
- 10.1142/S0217751X03012370

Generalized parton distributions in impact parameter space

M. Diehl
(
- Aachen, Tech. Hochsch.
)

- Eur.Phys.J.C 25 (2002) 223-232,
- Eur.Phys.J.C 31 (2003) 277-278 (erratum)
•
e-Print:
- hep-ph/0205208
•
DOI:
- 10.1007/s10052-002-1016-9

Charge Density of the Neutron

Gerald A. Miller
(
- Washington U., Seattle
)

- Phys.Rev.Lett. 99 (2007) 112001
•
e-Print:
- 0705.2409
•
DOI:
- 10.1103/PhysRevLett.99.112001

Quantum Electrodynamics in the Infinite Momentum Frame

John B. Kogut
(
- SLAC
)
,
Davison E. Soper
(
- SLAC
)

- Phys.Rev.D 1 (1970) 2901-2913
•
DOI:
- 10.1103/PhysRevD.1.2901

Impact parameter dependent parton distributions and transverse single spin asymmetries

Matthias Burkardt
(
- New Mexico State U.
)

- Phys.Rev.D 66 (2002) 114005
•
e-Print:
- hep-ph/0209179
•
DOI:
- 10.1103/PhysRevD.66.114005

Transverse deformation of parton distributions and transversity decomposition of angular momentum

Matthias Burkardt
(
- New Mexico State U.
)

- Phys.Rev.D 72 (2005) 094020
•
e-Print:
- hep-ph/0505189
•
DOI:
- 10.1103/PhysRevD.72.094020

Wave functions, evolution equations and evolution kernels from light ray operators of QCD

Dieter Müller
(
- Leipzig U.
)
,
D. Robaschik
(
- Leipzig U.
)
,
B. Geyer
(
- Leipzig U.
)
,
F.-M. Dittes
(
- Forschungszentrum Dresden Rossendorf
)
,
J. Hořejši
(
- Charles U.
)

- Fortsch.Phys. 42 (1994) 101-141
•
e-Print:
- hep-ph/9812448
•
DOI:
- 10.1002/prop.2190420202

Off forward parton distributions

Xiang-Dong Ji
(
- Maryland U.
)

- J.Phys.G 24 (1998) 1181-1205
•
e-Print:
- hep-ph/9807358
•
DOI:
- 10.1088/0954-3899/24/7/002

Nonforward parton distributions

A.V. Radyushkin
(
- Old Dominion U. and
- Jefferson Lab and
- Dubna, JINR
)

- Phys.Rev.D 56 (1997) 5524-5557
•
e-Print:
- hep-ph/9704207
•
DOI:
- 10.1103/PhysRevD.56.5524

Empirical transverse charge densities in the nucleon and the nucleon-to-Delta transition

Carl E. Carlson
(
- William-Mary Coll.
)
,
Marc Vanderhaeghen
(
- William-Mary Coll. and
- Jefferson Lab
)

- Phys.Rev.Lett. 100 (2008) 032004
•
e-Print:
- 0710.0835
•
DOI:
- 10.1103/PhysRevLett.100.032004

The Proton Elastic Form Factor Ratio mu(p) Gp(E)/Gp(M) at Low Momentum Transfer

G. Ron
(
- Tel Aviv U.
)
,
J. Glister
(
- St. Mary's U., Halifax and
- Dalhousie U.
)
,
B. Lee
(
- Seoul Natl. U.
)
,
K. Allada
(
- Kentucky U.
)
,
W. Armstrong
(
- Temple U.
)

et al.

- Phys.Rev.Lett. 99 (2007) 202002
•
e-Print:
- 0706.0128
•
DOI:
- 10.1103/PhysRevLett.99.202002

Measurement of the proton electric to magnetic form factor ratio from vector H-1(vector e, e' p)

Christopher B. Crawford
(
- MIT, LNS
)
,
A. Sindile
(
- New Hampshire U.
)
,
T. Akdogan
,
R. Alarcon
,
W. Bertozzi

et al.

- Phys.Rev.Lett. 98 (2007) 052301
•
e-Print:
- nucl-ex/0609007
•
DOI:
- 10.1103/PhysRevLett.98.052301

Measurements of the elastic electromagnetic form-factor ratio mu(p) G(Ep) / G(Mp) via polarization transfer

O. Gayou
(
- Clermont-Ferrand U. and
- William-Mary Coll.
)
,
K. Wijesooriya
(
- Argonne
)
,
A. Afanasev
(
- North Carolina Central U. and
- Jefferson Lab
)
,
M. Amarian
(
- INFN, Rome and
- Rome, ISS
)
,
K. Aniol
(
- Cal State, L.A.
)

et al.

- Phys.Rev.C 64 (2001) 038202
•
DOI:
- 10.1103/PhysRevC.64.038202

Polarization transfer in the He-4(e(pol.),e' p(pol.))H-3 reaction

Jefferson Lab E93-049 and
MAMI A1

Collaborations

•

S. Dieterich
(
- Rutgers U., Piscataway
)

for the collaborations.

- Nucl.Phys.A 690 (2001) 231-234
•
DOI:
- 10.1016/S0375-9474(01)00947-2

A Comparison of polarization observables in electron scattering from the proton and deuteron

Bates FPP

Collaboration

•

B.D. Milbrath
(
- Virginia U.
)

et al.

- Phys.Rev.Lett. 80 (1998) 452-455,
- Phys.Rev.Lett. 82 (1999) 2221 (erratum)
•
e-Print:
- nucl-ex/9712006
•
DOI:
- 10.1103/PhysRevLett.80.452

The Electron-Neutron Interaction

L.L. Foldy
(
- Case Western Reserve U.
)

- Phys.Rev. 83 (1951) 688-688
•
DOI:
- 10.1103/PhysRev.83.688

Implications of the discrepancy between proton form-factor measurements

J. Arrington
(
- Argonne, PHY
)

- Phys.Rev.C 69 (2004) 022201
•
e-Print:
- nucl-ex/0309011
•
DOI:
- 10.1103/PhysRevC.69.022201

The Role of color neutrality in nuclear physics: Modifications of nucleonic wave functions

M.R. Frank
(
- Washington U., Seattle
)
,
B.K. Jennings
(
- TRIUMF
)
,
G.A. Miller
(
- Washington U., Seattle
)

- Phys.Rev.C 54 (1996) 920-935
•
e-Print:
- nucl-th/9509030
•
DOI:
- 10.1103/PhysRevC.54.920

Light front cloudy bag model: Nucleon electromagnetic form-factors

Gerald A. Miller
(
- Washington U., Seattle
)

- Phys.Rev.C 66 (2002) 032201
•
e-Print:
- nucl-th/0207007
•
DOI:
- 10.1103/PhysRevC.66.032201

Dispersion analysis of the nucleon form-factors including meson continua

M.A. Belushkin
(
- Bonn U., HISKP
)
,
H.-W. Hammer
(
- Bonn U., HISKP
)
,
U.-G. Meissner
(
- Bonn U., HISKP and
- Julich, Forschungszentrum
)

- Phys.Rev.C 75 (2007) 035202
•
e-Print:
- hep-ph/0608337
•
DOI:
- 10.1103/PhysRevC.75.035202

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