New Precision Limit on the Strange Vector Form Factors of the Proton
The parity-violating cross-section asymmetry in the elastic scattering of polarized electrons from unpolarized protons has been measured at a four-momentum transfer squared Q[superscript 2]=0.624 GeV[superscript 2] and beam energy E[subscript b]=3.48 GeV to be A[subscript PV]=-23.80±0.78(stat)±0.3...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/71565 https://orcid.org/0000-0001-9930-5063 https://orcid.org/0000-0001-7871-4108 https://orcid.org/0000-0003-3088-6060 |
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| author | Huang, J. Muangma, Navaphon Sulkosky, Vincent Zhan, X. Kowalski, Stanley B. Pan, Kai, Ph. D. Massachusetts Institute of Technology |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Huang, J. Muangma, Navaphon Sulkosky, Vincent Zhan, X. Kowalski, Stanley B. Pan, Kai, Ph. D. Massachusetts Institute of Technology |
| author_sort | Huang, J. |
| collection | MIT |
| description | The parity-violating cross-section asymmetry in the elastic scattering of polarized electrons from unpolarized protons has been measured at a four-momentum transfer squared Q[superscript 2]=0.624 GeV[superscript 2] and beam energy E[subscript b]=3.48 GeV to be A[subscript PV]=-23.80±0.78(stat)±0.36(syst) parts per million. This result is consistent with zero contribution of strange quarks to the combination of electric and magnetic form factors G[subscript E][superscript s]+0.517G[subscript M][superscript s]=0.003±0.010(stat)±0.004(syst)±0.009(ff), where the third error is due to the limits of precision on the electromagnetic form factors and radiative corrections. With this measurement, the world data on strange contributions to nucleon form factors are seen to be consistent with zero and not more than a few percent of the proton form factors. |
| first_indexed | 2024-09-23T10:11:42Z |
| format | Article |
| id | mit-1721.1/71565 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:11:42Z |
| publishDate | 2012 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/715652023-02-26T06:07:13Z New Precision Limit on the Strange Vector Form Factors of the Proton Huang, J. Muangma, Navaphon Sulkosky, Vincent Zhan, X. Kowalski, Stanley B. Pan, Kai, Ph. D. Massachusetts Institute of Technology Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Sulkosky, Vincent Huang, J. Muangma, Navaphon Pan, Kai Sulkosky, Vincent Zhan, X. Kowalski, Stanley B. The parity-violating cross-section asymmetry in the elastic scattering of polarized electrons from unpolarized protons has been measured at a four-momentum transfer squared Q[superscript 2]=0.624 GeV[superscript 2] and beam energy E[subscript b]=3.48 GeV to be A[subscript PV]=-23.80±0.78(stat)±0.36(syst) parts per million. This result is consistent with zero contribution of strange quarks to the combination of electric and magnetic form factors G[subscript E][superscript s]+0.517G[subscript M][superscript s]=0.003±0.010(stat)±0.004(syst)±0.009(ff), where the third error is due to the limits of precision on the electromagnetic form factors and radiative corrections. With this measurement, the world data on strange contributions to nucleon form factors are seen to be consistent with zero and not more than a few percent of the proton form factors. United States. Dept. of Energy (Contract No. DE-AC05- 060R23177) 2012-07-09T16:29:10Z 2012-07-09T16:29:10Z 2012-03 2011-07 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/71565 Ahmed, Z. et al. “New Precision Limit on the Strange Vector Form Factors of the Proton.” Physical Review Letters 108.10 (2012). © 2012 American Physical Society https://orcid.org/0000-0001-9930-5063 https://orcid.org/0000-0001-7871-4108 https://orcid.org/0000-0003-3088-6060 en_US http://dx.doi.org/10.1103/PhysRevLett.108.102001 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Huang, J. Muangma, Navaphon Sulkosky, Vincent Zhan, X. Kowalski, Stanley B. Pan, Kai, Ph. D. Massachusetts Institute of Technology New Precision Limit on the Strange Vector Form Factors of the Proton |
| title | New Precision Limit on the Strange Vector Form Factors of the Proton |
| title_full | New Precision Limit on the Strange Vector Form Factors of the Proton |
| title_fullStr | New Precision Limit on the Strange Vector Form Factors of the Proton |
| title_full_unstemmed | New Precision Limit on the Strange Vector Form Factors of the Proton |
| title_short | New Precision Limit on the Strange Vector Form Factors of the Proton |
| title_sort | new precision limit on the strange vector form factors of the proton |
| url | http://hdl.handle.net/1721.1/71565 https://orcid.org/0000-0001-9930-5063 https://orcid.org/0000-0001-7871-4108 https://orcid.org/0000-0003-3088-6060 |
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