تقرير
J/psi production in proton-nucleus collisions at 158 and 400 GeV
| العنوان: | J/psi production in proton-nucleus collisions at 158 and 400 GeV |
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| المؤلفون: | Arnaldi, R., Banicz, K., Castor, J., Chaurand, B., Chen, W., Cicalo, C., Colla, A., Cortese, P., Damjanovic, S., David, A., de Falco, A., Devaux, A., Ducroux, L., En'yo, H., Fargeix, J., Ferretti, A., Floris, M., Foerster, A., Force, P., Guettet, N., Guichard, A., Gulkanian, H., Heuser, J. M., Keil, M., Li, Z., Lourenco, C., Lozano, J., Manso, F., Martins, P., Masoni, A., Neves, A., Ohnishi, H., Oppedisano, C., Parracho, P., Pillot, P., Poghosyan, T., Puddu, G., Radermacher, E., Ramalhete, P., Rosinsky, P., Scomparin, E., Seixas, J., Serci, S., Shahoyan, R., Sonderegger, P., Specht, H. J., Tieulent, R., Uras, A., Usai, G., Veenhof, R., Woehri, H. K. |
| سنة النشر: | 2010 |
| المجموعة: | Nuclear Experiment |
| مصطلحات موضوعية: | Nuclear Experiment |
| الوصف: | The NA60 experiment has studied J/psi production in p-A collisions at 158 and 400 GeV, at the CERN SPS. Nuclear effects on the J/psi yield have been estimated from the A-dependence of the production cross section ratios sigma_{J/psi}^{A}/sigma_{J/psi}^{Be} (A=Al, Cu, In, W, Pb, U). We observe a significant nuclear suppression of the J/psi yield per nucleon-nucleon collision, with a larger effect at lower incident energy, and we compare this result with previous observations by other fixed-target experiments. An attempt to disentangle the different contributions to the observed suppression has been carried out by studying the dependence of nuclear effects on x_2, the fraction of nucleon momentum carried by the interacting parton in the target nucleus. Comment: NA60 Collaboration, accepted for publication by Phys. Lett. B |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.physletb.2011.11.042 |
| URL الوصول: | http://arxiv.org/abs/1004.5523 |
| رقم الأكسشن: | edsarx.1004.5523 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.physletb.2011.11.042 |
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