Measurement of the Antiquark Flavor Asymmetry in the Nucleon Sea
| dc.creator | Towell, Rusty S. | |
| dc.date | 2001-02-22 | |
| dc.date.accessioned | 2026-07-07T05:36:44Z | |
| dc.date.available | 2026-07-07T05:36:44Z | |
| dc.description | A precise measurement of the ratio of Drell-Yan yields from an 800 GeV/c proton beam incident on liquid hydrogen and deuterium targets is reported. Over 370,000 Drell-Yan muon pairs were recorded. From these data, the ratio of anti-down ($\bar{d}$) to anti-up ($\bar{u}$) quark distributions in the proton sea is determined over a wide range in Bjorken-x. A strong x dependence is observed in the ratio $\bar{d}/\bar{u}$. From this result, the integral of $(\bar{d}-\bar{u})$ is evaluated for 0.015<x<0.35 and compared with deep inelastic scattering results. The origin of this asymmetry is probably due to non-perturbative effects such as those contained in pion cloud models. This measurement has instigated new global fits since previous parameterizations of the proton could not accommodate this large asymmetry. | |
| dc.description | Ph.D. Dissertation, 127 pages, 34 figures | |
| dc.identifier | https://arxiv.org/abs/nucl-ex/0102012 | |
| dc.identifier | http://arxiv.org/abs/nucl-ex/0102012 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/81096 | |
| dc.subject | Nuclear Experiment | |
| dc.title | Measurement of the Antiquark Flavor Asymmetry in the Nucleon Sea | |
| dc.type | text |