Parton distributions from SMC and SLAC data

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We have extracted spin-weighted parton distributions in a proton from recent data at CERN and SLAC. The valence, sea quark and Antiquark spin-weighted distributions are determined separately. The data are all consistent with a small to moderate polarized gluon distribution, so that the anomaly term is not significant in the determination of the constituent contributions to the spin of the proton. We have analyzed the consistency of the results obtained from various sets of data and the Biorken sum rule. Although all data are consistent with the sum rule, the polarized distributions from different experiments vary, even with higher order ... continued below

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13 p.

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Ramsey, G. P. & Goshtasbpour, M. January 4, 1996.

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  • Ramsey, G. P. Argonne National Lab., IL (United States). High Energy Physics Div.
  • Goshtasbpour, M. Center for Theoretical Physics and Mathematics, Tehran (Iran, Islamic Republic of)

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We have extracted spin-weighted parton distributions in a proton from recent data at CERN and SLAC. The valence, sea quark and Antiquark spin-weighted distributions are determined separately. The data are all consistent with a small to moderate polarized gluon distribution, so that the anomaly term is not significant in the determination of the constituent contributions to the spin of the proton. We have analyzed the consistency of the results obtained from various sets of data and the Biorken sum rule. Although all data are consistent with the sum rule, the polarized distributions from different experiments vary, even with higher order QCD corrections taken into account. Results split into two models, one set implying a large polarized strange sea which violates the positivity bound, and the other set yielding a smaller polarized strange sea. Only further experiments which extract information about the polarized sea will reconcile these differences. We suggest specific experiments which can be performed to determine the size of the polarized sea and gluons.

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13 p.

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INIS; OSTI as DE96006910

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  • 6. workshop on high energy spin phenomena, Protvino (Russian Federation), 18-23 Sep 1995

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  • Other: DE96006910
  • Report No.: ANL-HEP-CP--95-71
  • Report No.: CONF-9509325--1
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 204252
  • Archival Resource Key: ark:/67531/metadc672886

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  • January 4, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 2, 2016, 1:02 p.m.

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Ramsey, G. P. & Goshtasbpour, M. Parton distributions from SMC and SLAC data, article, January 4, 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc672886/: accessed July 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.