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x_F-dependence of J/Psi suppression in pA collisions | | C.A. Salgado
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22 May 2001 | | Journal: | Phys.Lett. B521 (2001) 211-216 | | Subject: | hep-ph | | Abstract: | Coherence effects are important in the description of collisions with extended objects as nuclei. At fixed target energies and small x_F, the coherence length of the fluctuation containing the $car c$ is small and the usual nuclear absorption model is valid. However, at higher energies and/or x_F the nucleus is seen as a whole by the fluctuation. In this case, the total, not the absorptive, $car c-N$ cross section controls the suppression and also shadowing of gluons appears. We propose that the growth of the coherence length can explain the x_F-dependence of present experimental data. For this, we need a ratio of absorptive over total $car c-N$ cross section of 0.2. | | Source: | arXiv, hep-ph/0105231 | | Services: | Forum | Review | PDF | Favorites | |
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