Study of superfast quarks using Jefferson Lab 11 GeV data
ORAL
Abstract
Measurements of the nuclear structure function F₂ at Bjorken x > 1 provide critical insights into the quark dynamics underlying the EMC effect. Inclusive scattering from nuclei in this region and at high Q² is particularly sensitive to the distribution of high-momentum, or “superfast,” quarks—partons carrying momentum exceeding that of a free nucleon. These quarks are connected to the short-distance structure of nuclei and offer a window into the transition from nucleonic to quark degrees of freedom.
The Hall C 11 GeV data from Jefferson Lab enable a more precise study than the previous 6 GeV program, as higher Q² values enhance the deep-inelastic regime while suppressing quasi-elastic contributions. In this work we examine target cross-section ratios as well as the scaling behavior of the nuclear structure function F₂ for different targets, studied as functions of Bjorken x and the Nachtmann variable ξ. These measurements probe scaling in the superfast-quark region and its evolution with Q².
The Hall C 11 GeV data from Jefferson Lab enable a more precise study than the previous 6 GeV program, as higher Q² values enhance the deep-inelastic regime while suppressing quasi-elastic contributions. In this work we examine target cross-section ratios as well as the scaling behavior of the nuclear structure function F₂ for different targets, studied as functions of Bjorken x and the Nachtmann variable ξ. These measurements probe scaling in the superfast-quark region and its evolution with Q².
*This work was supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contracts DE-AC02-05CH11231
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Presenters
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sebastian ignacio moran
- University of California, Riverside