دورية أكاديمية
Precision measurements of A n/1 in the deep inelastic regime
| العنوان: | Precision measurements of A n/1 in the deep inelastic regime |
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| المؤلفون: | Diana Marwick Seymour Parno, F. Benmokhtar, Gregg Franklin, M. Friend, V. Mamyan, Jefferson Lab Hall A Collaboration |
| سنة النشر: | 2018 |
| المجموعة: | KiltHub Research from Carnegie Mellon University |
| مصطلحات موضوعية: | Classical Physics not elsewhere classified, Spin structure functions, Nucleon structure, Parton distribution functions, Polarized electron scattering |
| الوصف: | We have performed precision measurements of the double-spin virtual-photon asymmetry A1 on the neutron in the deep inelastic scattering regime, using an open-geometry, large-acceptance spectrometer and a longitudinally and transversely polarized 3He target. Our data cover a wide kinematic range 0.277 ≤ x ≤ 0.548 at an average Q 2 value of 3.078 (GeV/c)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 An 1 zero crossing near x = 0.5. We find no evidence of a transition to a positive slope in (d + ¯ d)/(d + ¯ d) up to x = 0.548. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| العلاقة: | https://figshare.com/articles/Precision_measurements_of_A_n_1_in_the_deep_inelastic_regime/6507923Test |
| DOI: | 10.1184/r1/6507923.v1 |
| الإتاحة: | https://doi.org/10.1184/r1/6507923.v1Test https://figshare.com/articles/Precision_measurements_of_A_n_1_in_the_deep_inelastic_regime/6507923Test |
| حقوق: | CC BY 4.0 |
| رقم الانضمام: | edsbas.76215ECA |
| قاعدة البيانات: | BASE |
| DOI: | 10.1184/r1/6507923.v1 |
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