Precision measurements of A[n over 1] in the deep inelastic regime
We have performed precision measurements of the double-spin virtual-photon asymmetry A[subscript 1] on the neutron in the deep inelastic scattering regime, using an open-geometry, large-acceptance spectrometer and a longitudinally and transversely polarized [superscript 3]He target. Our data cover a...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Elsevier
2015
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| Online Access: | http://hdl.handle.net/1721.1/98202 https://orcid.org/0000-0001-7871-4108 https://orcid.org/0000-0003-2713-7800 https://orcid.org/0000-0002-6261-6172 |
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| author | Bertozzi, William Deconinck, Wouter Gilad, Shalev Huang, Jin Moffit, Bryan J. Muangma, Navaphon Sulkosky, Vincent Zhan, X. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Bertozzi, William Deconinck, Wouter Gilad, Shalev Huang, Jin Moffit, Bryan J. Muangma, Navaphon Sulkosky, Vincent Zhan, X. |
| author_sort | Bertozzi, William |
| collection | MIT |
| description | We have performed precision measurements of the double-spin virtual-photon asymmetry A[subscript 1] on the neutron in the deep inelastic scattering regime, using an open-geometry, large-acceptance spectrometer and a longitudinally and transversely polarized [superscript 3]He target. Our data cover a wide kinematic range 0.277 ≤ x ≤ 0.548 at an average Q[superscript 2] value of 3.078 (GeV/c)[superscript 2], doubling the available high-precision neutron data in this x range. We have combined our results with world data on proton targets to make a leading-order extraction of the ratio of polarized-to-unpolarized parton distribution functions for up quarks and for down quarks in the same kinematic range. Our data are consistent with a previous observation of an A[n over 1] zero crossing near x = 0.5. We find no evidence of a transition to a positive slope in (Δd + Δ[bar over d])/(d + [bar over d]) up to x = 0.548. |
| first_indexed | 2024-09-23T09:50:14Z |
| format | Article |
| id | mit-1721.1/98202 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:50:14Z |
| publishDate | 2015 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/982022023-02-26T11:13:52Z Precision measurements of A[n over 1] in the deep inelastic regime Bertozzi, William Deconinck, Wouter Gilad, Shalev Huang, Jin Moffit, Bryan J. Muangma, Navaphon Sulkosky, Vincent Zhan, X. Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Bertozzi, William Deconinck, Wouter Gilad, Shalev Huang, Jin Moffit, Bryan J. Muangma, Navaphon Sulkosky, Vincent Zhan, Xiaohui We have performed precision measurements of the double-spin virtual-photon asymmetry A[subscript 1] on the neutron in the deep inelastic scattering regime, using an open-geometry, large-acceptance spectrometer and a longitudinally and transversely polarized [superscript 3]He target. Our data cover a wide kinematic range 0.277 ≤ x ≤ 0.548 at an average Q[superscript 2] value of 3.078 (GeV/c)[superscript 2], doubling the available high-precision neutron data in this x range. We have combined our results with world data on proton targets to make a leading-order extraction of the ratio of polarized-to-unpolarized parton distribution functions for up quarks and for down quarks in the same kinematic range. Our data are consistent with a previous observation of an A[n over 1] zero crossing near x = 0.5. We find no evidence of a transition to a positive slope in (Δd + Δ[bar over d])/(d + [bar over d]) up to x = 0.548. 2015-08-24T15:27:35Z 2015-08-24T15:27:35Z 2015-04 2015-03 Article http://purl.org/eprint/type/JournalArticle 03702693 http://hdl.handle.net/1721.1/98202 “Precision Measurements of A[n over 1] in the Deep Inelastic Regime.” Physics Letters B 744 (May 2015): 309–314. https://orcid.org/0000-0001-7871-4108 https://orcid.org/0000-0003-2713-7800 https://orcid.org/0000-0002-6261-6172 en_US http://dx.doi.org/10.1016/j.physletb.2015.03.067 Physics Letters B Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Elsevier Elsevier |
| spellingShingle | Bertozzi, William Deconinck, Wouter Gilad, Shalev Huang, Jin Moffit, Bryan J. Muangma, Navaphon Sulkosky, Vincent Zhan, X. Precision measurements of A[n over 1] in the deep inelastic regime |
| title | Precision measurements of A[n over 1] in the deep inelastic regime |
| title_full | Precision measurements of A[n over 1] in the deep inelastic regime |
| title_fullStr | Precision measurements of A[n over 1] in the deep inelastic regime |
| title_full_unstemmed | Precision measurements of A[n over 1] in the deep inelastic regime |
| title_short | Precision measurements of A[n over 1] in the deep inelastic regime |
| title_sort | precision measurements of a n over 1 in the deep inelastic regime |
| url | http://hdl.handle.net/1721.1/98202 https://orcid.org/0000-0001-7871-4108 https://orcid.org/0000-0003-2713-7800 https://orcid.org/0000-0002-6261-6172 |
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