Dirac and Pauli form factors from lattice QCD - INSPIRE

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Dirac and Pauli form factors from lattice QCD

S. Collins
(
- Regensburg U.
)
,
M. Gockeler
(
- Regensburg U.
)
,
Ph. Hagler
(
- Mainz U., Inst. Kernphys. and
- Regensburg U.
)
,
R. Horsley
(
- Edinburgh U.
)
,
Y. Nakamura
(
- JAERI-RIKEN, Hyogo
)

Jun, 2011

31 pages

Published in:

Phys.Rev.D 84 (2011) 074507

e-Print:

1106.3580 [hep-lat]

DOI:

10.1103/PhysRevD.84.074507

Report number:

DESY-11-102,
EDINBURGH-2011-18,
MKPH-T-11-13

View in:

ADS Abstract Service

reference search77 citations

Citations per year

Abstract: (arXiv)

We present a comprehensive analysis of the electromagnetic form factors of the nucleon from a lattice simulation with two flavors of dynamical O(a)-improved Wilson fermions. A key feature of our calculation is that we make use of an extensive ensemble of lattice gauge field configurations with four different lattice spacings, multiple volumes, and pion masses down to m_\pi ~ 180 MeV. We find that by employing Kelly-inspired parametrizations for the Q^2-dependence of the form factors, we are able to obtain stable fits over our complete ensemble. Dirac and Pauli radii and the anomalous magnetic moments of the nucleon are extracted and results at light quark masses provide evidence for chiral non-analytic behavior in these fundamental observables.

Note:

31 pages, 62 figures

12.38.Gc
13.40.Gp
14.20.Dh
nucleon: form factor
form factor: electromagnetic
fermion: Wilson
quark: mass
flavor: 2
nucleon: magnetic moment: calculated
pi: mass

References(51)

Figures(63)

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

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•
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Electromagnetic form factors of the nucleon and Compton scattering

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

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Nucleon Electromagnetic Form Factors

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

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•
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•
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)
,
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Charles F. Perdrisat
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)
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)
,
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)

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M.A. Belushkin
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)
,
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,
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R. Bijker
(
- Mexico U., ICN
)
,
F. Iachello
(
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)

- Phys.Rev.C 69 (2004) 068201
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The Role of Mesons in the Electromagnetic Form Factors of the Nucleon

C. Crawford
(
- Kentucky U.
)
,
T. Akdogan
(
- MIT, Bates Linear Accelerator
)
,
R. Alarcon
(
- Arizona State U.
)
,
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,
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)

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•
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J.J. Kelly
(
- Maryland U.
)

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•
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$G_{Ep}/G_{Mp}$ ratio by polarization transfer in $\vec ep\rightarrow e\vec p$

Jefferson Lab Hall A

Collaboration

•

M.K. Jones
(
- William-Mary Coll.
)

et al.

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•
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High-Precision Measurement of the Proton Elastic Form Factor Ratio $\mu_pG_E/G_M$ at low $Q^2$

X. Zhan
(
- MIT and
- Argonne, PHY
)
,
K. Allada
(
- Kentucky U.
)
,
D.S. Armstrong
(
- William-Mary Coll.
)
,
J. Arrington
(
- Argonne, PHY
)
,
W. Bertozzi
(
- MIT
)

et al.

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•
e-Print:
- 1102.0318
•
DOI:
- 10.1016/j.physletb.2011.10.002

Low $Q^2$ measurements of the proton form factor ratio $mu_p G_E / G_M$

Jefferson Lab Hall A

Collaboration

•

G. Ron
(
- Weizmann Inst. and
- LBL, Berkeley and
- Hebrew U.
)

et al.

- Phys.Rev.C 84 (2011) 055204
•
e-Print:
- 1103.5784
•
DOI:
- 10.1103/PhysRevC.84.055204

The size of the proton

et al.

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•
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Review of particle physics

K. Nakamura
(
- Tokyo U., IPMU and
- KEK, Tsukuba
)
,
K. Hagiwara
(
- KEK, Tsukuba
)
,
K. Hikasa
(
- Tohoku U.
)
,
H. Murayama
(
- LBL, Berkeley and
- UC, Berkeley and
- Tokyo U., IPMU
)
,
M. Tanabashi
(
- Nagoya U.
)

et al.

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•
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CODATA Recommended Values of the Fundamental Physical Constants: 2006

Peter J. Mohr
(
- NIST, Wash., D.C.
)
,
Barry N. Taylor
(
- NIST, Wash., D.C.
)
,
David B. Newell
(
- NIST, Wash., D.C.
)

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•
e-Print:
- 0801.0028
•
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High-precision determination of the electric and magnetic form factors of the proton

A1

Collaboration

•

J.C. Bernauer
(
- Mainz U., Inst. Kernphys.
)

et al.

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•
e-Print:
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•
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Chiral structure of the nucleon

Veronique Bernard
(
- Strasbourg, CRN
)
,
Norbert Kaiser
(
- Munich, Tech. U.
)
,
Joachim Kambor
(
- Munich, Tech. U.
)
,
Ulf G. Meissner
(
- Bern U.
)

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•
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Veronique Bernard
(
- Strasbourg, CRN
)
,
Harold W. Fearing
(
- TRIUMF
)
,
Thomas R. Hemmert
(
- TRIUMF
)
,
Ulf G. Meissner
(
- Julich, Forschungszentrum
)

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•
e-Print:
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•
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Chiral magnetism of the nucleon

Thomas R. Hemmert
(
- Munich, Tech. U. and
- Washington U., Seattle
)
,
Wolfram Weise
(
- Munich, Tech. U. and
- ECT, Trento
)

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•
e-Print:
- hep-lat/0204005
•
DOI:
- 10.1140/epja/i2002-10052-6

Nucleon electromagnetic form-factors on the lattice and in chiral effective field theory

QCDSF

Collaboration

•

M. Gockeler
(
- Leipzig U. and
- Regensburg U.
)

et al.

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•
e-Print:
- hep-lat/0303019
•
DOI:
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Leading quenching effects in the proton magnetic moment

Ross Daniel Young
(
- Adelaide U.
)
,
Derek Bruce Leinweber
(
- Adelaide U.
)
,
Anthony William Thomas
(
- Adelaide U. and
- Jefferson Lab
)

- Phys.Rev.D 71 (2005) 014001
•
e-Print:
- hep-lat/0406001
•
DOI:
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Precision electromagnetic structure of octet baryons in the chiral regime

S. Boinepalli
(
- Adelaide U.
)
,
D.B. Leinweber
(
- Adelaide U.
)
,
A.G. Williams
(
- Adelaide U.
)
,
J.M. Zanotti
(
- Adelaide U. and
- Edinburgh U.
)
,
J.B. Zhang
(
- Adelaide U. and
- Zhejiang U., Inst. Mod. Phys. and
- Zhejiang U.
)

- Phys.Rev.D 74 (2006) 093005
•
e-Print:
- hep-lat/0604022
•
DOI:
- 10.1103/PhysRevD.74.093005

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