Constituent quarks and g 1

Bass, Steven D.

doi:10.1007/s100500050252

Cited by 121 publications

(3 citation statements)

References 115 publications

(256 reference statements)

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“…The g p−n 1 data are consistent with quark model and perturbative QCD counting rules predictions in the valence region x > 0.2 (Bass, 1999a). The size of g…”

Section: Theoretical Understandingsupporting

confidence: 77%

The Spin Structure of the Nucleon

Aidala,

Bass,

Hasch

et al. 2012

Preprint

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“…The g p−n 1 data are consistent with quark model and perturbative QCD counting rules predictions in the valence region x > 0.2 (Bass, 1999a). The size of g…”

Section: Theoretical Understandingsupporting

confidence: 77%

The Spin Structure of the Nucleon

Aidala,

Bass,

Hasch

et al. 2012

Preprint

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“…data is consistent with quark model and perturbative QCD predictions in the valence region x > 0.2 [10]. The size of g…”

Section: The Spin Structure Of the Proton In Free Spacesupporting

confidence: 84%

Gamow-Teller transitions and the spin EMC effect: the Bjorken sum-rule in medium

Bass

2020

Preprint

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Gamow-Teller transitions in nuclei tell us that the nucleon's axial charge g(3)A is quenched in large nuclei by about 20%. This result tells us that the spin structure of the nucleon is modified in nuclei and disfavours models of the medium dependence of parton structure based only on nucleon short range correlations in nuclei. For polarized photoproduction the Gerasimov-Drell-Hearn integral is expected to be strongly enhanced in medium.

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“…About 50% of the sum-rule comes from x values less than about 0.15. The g p−n 1 data is consistent with quark model and perturbative QCD predictions in the valence region x > 0.2 [22]. The size of g…”

Section: Spin Dependent Regge Theorysupporting

confidence: 79%

Updating spin-dependent Regge intercepts

2018

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We use new high statistics data from CLAS and COMPASS on the nucleon's spin structure function at low Bjorken x and low virtuality, Q 2 < 0.5 GeV 2 , together with earlier measurements from the SLAC E-143, HERMES and GDH experiments to estimate the effective intercept(s) for spin dependent Regge theory. We find αa 1 = 0.31 ± 0.04 for the intercept describing the high-energy behaviour of spin dependent photoabsorption together with a new estimate for the high-energy part of the Gerasimov-Drell-Hearn sum-rule, −15 ± 2µb from photon-proton centre-of-mass energy greater than 2.5 GeV. Our value of αa 1 suggests QCD physics beyond a simple straight-line a1 trajectory.

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Constituent quarks and g 1

Abstract: We review the theory and present status of the proton spin problem with emphasis on the transition between current quarks and constituent quarks in

Cited by 121 publications

References 115 publications

The Spin Structure of the Nucleon

The Spin Structure of the Nucleon

Gamow-Teller transitions and the spin EMC effect: the Bjorken sum-rule in medium

Updating spin-dependent Regge intercepts

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