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Mesonic and binding contributions to the nuclear Drell-Yan process
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Mesonic and binding contributions to the nuclear Drell-Yan process
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| Marco Rubio, Eugenio; Oset Báguena, Eulogio | |||
| Aquest document és un/a article, creat/da en: 1999 | |||
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| We have evaluated the Drell-Yan cross section in nuclei paying special attention to the meson cloud contribution from pion and rho-meson, for which an accurate calculation using the meson nuclear spectral functions is used. Similarly, the nucleonic contribution is evaluated in terms of a relativistic nucleon spectral function. Fair agreement with experiment is found for different nuclei and the results show a sizeable contribution from the renormalized meson cloud. In order to reproduce the experiment a novel element is introduced, consisting of a gradual energy loss of the incoming proton in its pass through the nucleus which produces a strong A dependence at x_1 large. | |||
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