Reevaluation of the Gottfried sum

Arneodo, M.; Arvidson, Adam Regn; Badełek, B.; Ballintijn@f, M.; Baum@f, G.; Beaufays, J.; Bird, I.; Björkholm, P.; Botje, M.; Broggini, C.; Brückner@f, W.; Brüll, A.; Burger, W. J.; Ciborowski, J.; Dantzig@f, R. van; Dyring, A.; Engelien, H.; Ferrero, M. I.; Fluri@f, L.; Gaul@f, U.; Granier, T.; Harrach, D. von; Heijden, M. van der; Heusch, C. A.; Ingram, Q.; Janson-Prytz, K.; Jong@f, M. de; Kabuß, E. M.; Kaiser@f, R.; Ketel@f, T. J.; Klein@f, F.; Kullander, S.; Landgraf@f, U.; Lindqvist, T.; Mallot, G.K.; Mariotti, C.; Middelkoop, G. van; Milsztajn, A.; Mizuno, Y.; Nassalski, J.; Oberski@f, J.; Nowotny, D.; Paic@f, A.; Peroni, C.; Povh, Bogdan; Rieger, R.; Rith, Klaus; Röhrich, K.; Rondio, E.; Ropelewski, L.; Sandacz, A.; Sanders, D. A.; Scholz@f, C.; Schumacher, R. A.; Seitz@f, R.; Sever, F.; Shibata@f, T.-A.; Siebler@f, M.; Simon@f, A.; Staiano, A.; Szleper, M.; Tzamouranis, Y.; Virchaux, M.; Vuilleumier@f, J. L.; Walcher@f, T.; Windmolders@f, R.; Witzmann@f, A.; Zetsche@f, F.

doi:10.1103/physrevd.50.r1

Cited by 329 publications

(186 citation statements)

References 9 publications

Supporting

Mentioning

165

Contrasting

Order By: Relevance

“…[43]. However, the lower x NMC data [38,39] showed that this idea was untenable. Other attempts to understand the sum rule violation centered around the extraction of the neutron distribution from deuterium or other light nuclear data.…”

Section: Current Experimental Studiesmentioning

confidence: 99%

“…Experiments have clearly shown that not only is u = d but also that the difference is a strong function of x [39,41]. A number of models have been proposed to describe this difference, including meson clouds, Pauli blocking, chiral models, and charge symmetry violation.…”

Section: Light Sea Summarymentioning

confidence: 99%

“…The Drell-Yan process provides an elegant way to obtain the ratio d/u by comparing Drell-Yan production on proton and deuterium targets [47]. Then measured by NMC [39] at Q 2 = 4 GeV 2 compared with calculations using the MRS (R2) [40] (dashed) and the MRST [26] (solid) parton distributions. The E866 [41] Drell-Yan results on the sea quark contribution to the difference are shown at the same Q 2 .…”

Section: Current Experimental Studiesmentioning

confidence: 99%

“…If charge symmetry is assumed to be violated, the difference between Eqs. (39) and (98) can be used to estimate the size of the violation [21] …”

Section: Charge Symmetry Violationmentioning

confidence: 99%

See 3 more Smart Citations

Physics of the Nucleon Sea Quark Distributions

Vogt¹

2000

Progress in Particle and Nuclear Physics

View full text Add to dashboard Cite

Sea quark distributions in the nucleon have naively been expected to be generated perturbatively by gluon splitting. In this case, there is no reason for the light quark and anti-quark sea distributions to be different. No asymmetries in the strange or heavy quark sea distributions are predicted in the improved parton model. However, recent experiments have called these naive expectations into question. A violation of the Gottfried sum rule has been measured in several experiments, suggesting that u < d in the proton. Additionally, other measurements, while not definitive, show that there may be an asymmetry in the strange and anti-strange quark sea distributions. These effects may require nonperturbative explanations. In this review we first discuss the perturbative aspects of the sea quark distributions. We then describe the experiments that could point to nonperturbative contributions to the nucleon sea. Current phenomenological models that could explain some of these effects are reviewed.

show abstract

Section: Current Experimental Studiesmentioning

confidence: 99%

Section: Light Sea Summarymentioning

confidence: 99%

Section: Current Experimental Studiesmentioning

confidence: 99%

“…If charge symmetry is assumed to be violated, the difference between Eqs. (39) and (98) can be used to estimate the size of the violation [21] …”

Section: Charge Symmetry Violationmentioning

confidence: 99%

See 2 more Smart Citations

Physics of the Nucleon Sea Quark Distributions

Vogt¹

2000

Progress in Particle and Nuclear Physics

View full text Add to dashboard Cite

show abstract

“…the non-singlet structure function F p 2 − F n 2 and the Gottfried sum S G = (F p 2 − F n 2 )dx/x can be determined. For the latter, it was shown that the simple quark-model expectation of 1/3 is not reached [42,43] and hence the light quark sea is not flavor-symmetric. We do not elaborate on these aspects here, as our data add only limited additional information in the DIS region.…”

Section: Jhep05(2011)126mentioning

confidence: 99%

Inclusive measurements of inelastic electron and positron scattering from unpolarized hydrogen and deuterium targets

Airapetian¹,

Акопов²,

Akopov³

et al. 2011

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

Results of inclusive measurements of inelastic electron and positron scattering from unpolarized protons and deuterons at the HERMES experiment are presented. The structure functions F p 2 and F d 2 are determined using a parameterization of existing data for the longitudinal-to-transverse virtual-photon absorption cross-section ratio. The HERMES results provide data in the ranges 0.006 ≤ x ≤ 0.9 and 0.1 GeV 2 ≤ Q 2 ≤ 20 GeV 2 , covering the transition region between the perturbative and the non-perturbative regimes of QCD in a so-far largely unexplored kinematic region. They are in agreement with existing world data in the region of overlap. The measured cross sections are used, in combination with data from other experiments, to perform fits to the photon-nucleon cross section using the functional form of the ALLM model. The deuteron-to-proton cross-section ratio is also determined.

show abstract

Untitled

Ji¹

2018

Light Cone 2016

View full text Add to dashboard Cite

Reevaluation of the Gottfried sum

Cited by 329 publications

References 9 publications

Physics of the Nucleon Sea Quark Distributions

Physics of the Nucleon Sea Quark Distributions

Inclusive measurements of inelastic electron and positron scattering from unpolarized hydrogen and deuterium targets

Untitled

Contact Info

Product

Resources

About