New insights into the spin structure of the nucleon - INSPIRE

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New insights into the spin structure of the nucleon

Veronique Bernard
(
- Orsay, IPN
)
,
Evgeny Epelbaum
(
- Ruhr U., Bochum
)
,
Hermann Krebs
(
- Ruhr U., Bochum
)
,
Ulf-G. Meissner
(
- Bonn U., HISKP and
- Bonn U. and
- Julich, Forschungszentrum and
- IAS, Julich and
- JCHP, Julich
)

Sep, 2012

9 pages

Published in:

Phys.Rev.D 87 (2013) 5, 054032

Published: Mar 26, 2013

e-Print:

1209.2523 [hep-ph]

DOI:

10.1103/PhysRevD.87.054032

View in:

ADS Abstract Service

reference search73 citations

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Abstract: (APS)

We analyze the low-energy spin structure of the nucleon in a covariant effective field theory with explicit spin-3/2 degrees of freedom to third order in the small scale expansion. Using the available data on the strong and electromagnetic width of the Δ resonance, we give parameter-free predictions for various spin polarizabilities and moments of spin structure functions. We find an improved description of the nucleon spin structure at finite photon virtualities for some observables and point out the necessity of a fourth-order calculation.

Note:

13 pages, 6 figures

12.39.Fe
11.55.Fv
14.20.Dh
double virtual Compton scattering
nucleon spin structure
effective field theory
nucleon: spin
structure function: spin
effective field theory
higher-order: 4

References(47)

Figures(10)

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)

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)
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(
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)
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)
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)

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Michael C. Birse
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- Arizona U. and
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)
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)

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•
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[13]

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Robert P. Hildebrandt
(
- Munich, Tech. U.
)
,
Harald W. Griesshammer
(
- Munich, Tech. U. and
- ECT, Trento
)
,
Thomas R. Hemmert
(
- Munich, Tech. U. and
- ECT, Trento
)
,
Barbara Pasquini
(
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)

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•
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Robert P. Hildebrandt
(
- Munich, Tech. U.
)
,
Harald W. Griesshammer
(
- Munich, Tech. U. and
- ECT, Trento
)
,
Thomas R. Hemmert
(
- Munich, Tech. U. and
- ECT, Trento
)

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•
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•
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H.W. Griesshammer
(
- George Washington U.
)
,
J.A. McGovern
(
- Manchester U.
)
,
D.R. Phillips
(
- Ohio U.
)
,
G. Feldman
(
- George Washington U.
)

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•
e-Print:
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•
DOI:
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[16]

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Vadim Lensky
(
- Manchester U.
)
,
Judith A. McGovern
(
- Manchester U.
)
,
Daniel R. Phillips
(
- Ohio U.
)
,
Vladimir Pascalutsa
(
- Mainz U., Inst. Kernphys.
)

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•
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(
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- Ohio U.
)
,
Judith A. McGovern
(
- Manchester U.
)
,
Harald W. Griesshammer
(
- George Washington U.
)

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•
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(
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)
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)

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Thomas R. Hemmert
(
- TRIUMF
)
,
Barry R. Holstein
(
- Massachusetts U., Amherst
)
,
Germar Knochlein
(
- TRIUMF and
- Mainz U., Inst. Kernphys.
)
,
Stefan Scherer
(
- Mainz U., Inst. Kernphys.
)

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Michael C. Birse
(
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)
,
Judith A. McGovern
(
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)

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•
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•
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[24]

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