Nucleon spin polarizability at order<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>O</mml:mi><mml:mo>(</mml:mo><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mo>)</mml:mo></mml:math>in chiral perturbation theory

Ji, Xiangdong; Kao, Cheng−Yan; Osborne, Jonathan

doi:10.1103/physrevd.61.074003

Cited by 52 publications

(89 citation statements)

References 8 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The origin of the problem is due to the fact that HBChPT relies on nonrelativistic expansions of the intermediate state propagators, which makes it difficult to separate the pole terms from the internal structure contributions that are related to the polarizabilities. The two results for γ 0 at O(p 4 ) read [26,23,24] …”

Section: Resultsmentioning

confidence: 99%

“…that the spin polarizabilities of Refs. [23,24] contain higher order contributions from the nucleon pole term. The origin of the problem is due to the fact that HBChPT relies on nonrelativistic expansions of the intermediate state propagators, which makes it difficult to separate the pole terms from the internal structure contributions that are related to the polarizabilities.…”

Section: Resultsmentioning

confidence: 99%

“…They find strong modifications due to the nextorder term, which even change the sign of the slope at the origin to negative values much below the phenomenological analysis. In a similar way the related forward spin polarizability γ 0 is changed substantially by going from O(p 3 ) to O(p 4 ) , which may cast some doubt on the convergence of the perturbation series [22][23][24]26]. Unfortunately there appears an additional problem concerning the decomposition of the Compton amplitude in the nucleon pole terms (contained in the real Born amplitude) and contributions of intermediate excited states (the complex residual amplitude).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gerasimov-Drell-Hearn sum rule and related integrals

2001

View full text Add to dashboard Cite

The spin structure of the nucleon resonance region is analyzed on the basis of our phenomenological model MAID. Predictions are given for the Gerasimov-Drell-Hearn sum rule as well as generalized integrals over spin structure functions. The dependence of these integrals on momentum transfer is studied and rigorous relationships between various definitions of generalized Gerasimov-Drell-Hearn integrals and spin polarizabilities are derived. These results are compared to the predictions of chiral perturbation theory and phenomenological models.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Gerasimov-Drell-Hearn sum rule and related integrals

2001

View full text Add to dashboard Cite

show abstract

“…Higher order derivatives at the photon point are, in principle, calculable via χPT [37,38]. Therefore, measuring Γ 1 over the whole range in Q 2 yields a stringent test of our understanding of strongly interacting matter at all length scales.…”

Section: F Momentsmentioning

confidence: 99%

“…Within the Operator Product Expansion formalism, these moments can be related to local operators [5,6]. They are constrained by several sum rules and can be calculated directly within lattice QCD or in effective field theories like Chiral Perturbation Theory (χPT) [37,38]. Determining these moments over a range of Q 2 allows us to study the transition from hadronic degrees of freedom at large distances (small Q 2 ) to partonic ones at small distances in our description of the nucleon, and to extract higher twist matrix elements that are sensitive to quark-gluon correlations in the nucleon.…”

Section: F Momentsmentioning

confidence: 99%

Precise determination of the deuteron spin structure at low to moderateQ2with CLAS and extraction of the neutron contribution

Guler¹,

Fersch²,

Kuhn³

et al. 2015

Phys. Rev. C

View full text Add to dashboard Cite

Precise determination of the deuteron spin structure at low to moderate Q^{2} with CLAS and extraction of the neutron contribution We present the final results for the deuteron spin structure functions obtained from the full data set collected with Jefferson Lab's CLAS in 2000-2001. Polarized electrons with energies of 1.6, 2.5, 4.2 and 5.8 GeV were scattered from deuteron ( 15 ND3) targets, dynamically polarized along the beam direction, and detected with CLAS. From the measured double spin asymmetry, the virtual photon absorption asymmetry A d 1 and the polarized structure function g d 1 were extracted over a wide kinematic range (0.05 GeV 2 < Q 2 < 5 GeV 2 and 0.9 GeV < W < 3 GeV). We use an unfolding procedure and a parametrization of the corresponding proton results to extract from these data the polarized structure functions A n 1 and g n 1 of the (bound) neutron, which are so far unknown in the resonance region, W < 2 GeV. We compare our final results, including several moments of the deuteron and neutron spin structure functions, with various theoretical models and expectations as well as parametrizations of the world data. The unprecedented precision and dense kinematic coverage of these data can aid in future extractions of polarized parton distributions, tests of perturbative QCD predictions for the quark polarization at large x, a better understanding of quark-hadron duality, and more precise values for higher-twist matrix elements in the framework of the Operator Product Expansion.

show abstract

The spin program with CLAS at JLab

Minehart

2005

Czech J Phys

View full text Add to dashboard Cite

We report on the status of an extensive program to study the scattering of longitudinally polarized electrons from longitudinally polarized NH3 and NDa targets using the CLAS detector at JLab. The data span a range in Q2 from 0.05-4.5 (GeV/c) 2 and a range in W, the "y*N invariant mass, up to about 3GeV. With the excellent particle identification available with the CLAS, both inclusive and exclusive scattering can be studied. The experimental techniques are reviewed and some preliminary results are presented. This paper focuses on extraction of the spin structure function gl for the proton and the deuteron.

show abstract

Nucleon spin polarizability at orderO(p4)in chiral perturbation theory

Cited by 52 publications

References 8 publications

Gerasimov-Drell-Hearn sum rule and related integrals

Gerasimov-Drell-Hearn sum rule and related integrals

Precise determination of the deuteron spin structure at low to moderateQ2with CLAS and extraction of the neutron contribution

The spin program with CLAS at JLab

Contact Info

Product

Resources

About