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Opportunities with Drell-Yan scattering: Probing sea quarks in the nucleon and nuclei

  • QNP 2006
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Abstract.

The large ¯(x)/¯(x) ratio observed by Fermilab E866/NuSea convincingly demonstrated that the sea is not simply a result of pQCD. Moreover, meson cloud models also failed to explain fully the observed kinematic dependence. The Drell-Yan mechanism offers a unique, selective probe of antiquarks in the nucleon. Fermilab has approved a new Drell-Yan experiment, E906, that will exploit this feature to probe ¯(x)/¯(x) by measuring the ratio of cross-sections for the proton-induced Drell-Yan process on hydrogen to deuterium. When the nucleon is contained in a nucleus, the nucleon's parton distributions should to be modified; although this effect was not seen in the sea quark distributions obtained by Fermilab E772 with Drell-Yan scattering. The upcoming E906 Drell-Yan experiment will provide much more precise measurements over a wider kinematic range in order to guide and challenge the theoretical models.

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  1. Physics Division, Argonne National Laboratory, 60439, Argonne, IL, USA

    P. E. Reimer

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  1. P. E. Reimer
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Reimer, P.E. Opportunities with Drell-Yan scattering: Probing sea quarks in the nucleon and nuclei. Eur. Phys. J. A 31, 593–596 (2007). https://doi.org/10.1140/epja/i2006-10196-3

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  • DOI: https://doi.org/10.1140/epja/i2006-10196-3

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