Diffraction dissociation of nuclei in 450 GeV/c proton-nucleus collisions

Autor: Åkesson, T., Almehed, S., Angelis, A. L. S., Atherton, H., Aubry, P., Bartels, H. W., Beaudoin, G., Beaulieu, J. M., Beker, H., Benary, O., Bettoni, D., Bisi, V., Blevis, I., Bøggild, H., Cleland, W., Clemen, M., Collick, B., Corriveau, F., Dagan, S., Dederichs, K., Dell'Uomo, S., Depommier, P., Devenish, R. C. E., DiGiacomo, N., DiLiberto, S., Dodd, J. R., Dolgoshein, B., Drees, A., En'yo, H., Erlandsson, B., Esten, M. J., Fabjan, C. W., Faessler, M. A., Fischer, P., Fraenkel, Z., Gaidot, A., Gibrat-Debu, F., Giubellino, P., Glässel, P., Goerlach, U., Haglund, R., Hamel, L. A., van Hecke, H., Hedberg, V., Heifetz, R., Hölscher, A., Jacak, B., Jarlskog, G., Johanson, S., Kraner, H., Kroh, V., Lamarche, F., Leroy, C., Lisauer, D., London, G., Lorstad, B., Lounis, A., Martelli, F., marzari-Chiesa, A., Masera, M., Mazzoni, M. A., Mazzucato, E., McCubbin, N. A., McGaughey, P., Meddi, F., Mjornmark, U., Muciaccia, M. T., Muraviev, S., Murray, M., Neubert, M., Nilsson, S., Olsen, L., Oren, Y., Pansart, J. P., Park, Y. M., Pfeiffer, A., Piuz, F., Polychronakos, V., Poulard, G., Price, M., Rahm, D., Ramello, L., Riccati, L., Romano, G., Rosa, G., Sandor, L., Schukraft, J., Sekimoto, M., Seman, M., Shmeleva, A., Sidorov, V., Simone, S., Sirois, Y., Sletten, H., Smirnov, S., Sondheim, W., Specht, H. J., Stumer, I., Sunier, J. W., Tcherniatin, V., Thodberg, H. H., Thompson, J., Tikhomirov, V., Tserruya, I., Vasseur, G., Veenhof, R., Wigmans, R., Willis, W. J., Yepes, P.
Zdroj: Zeitschrift für Physik C Particles and Fields; September 1991, Vol. 49 Issue: 3 p355-366, 12p
Abstrakt: Diffractive dissociation of nuclei (Be, Al, W) in collisions with 450 GeV/c protons,pA?pX, has been measured with the HELIOS spectrometer at the CERN Super Proton synchrotron. The dependence of the single-diffraction cross-section on the nuclear massA can be parametrized as sSD mb×A0.35±0.02, showing the peripheral nature of the process. The differential cross-section dsSD=(3.8±0.3)mb ×A0.35±0.02, is exponential with the slope parameter, increasing from 6.2±0.4 (GeV/c)-2 for beryllium to 7.9±0.5 (GeV/c)-2 for tungsten. The slope parameter also increases with increasing massMX of the diffractively produced state. The rapidity, multiplicity, and transverse-momentum distributions of the particles of the diffractively produced stateX show a longitudinal phase-space population and are remarkably insensitive to the nuclear mass. This, together with theA1/3 dependence of sSD, suggests that the dominant process of nuclear diffractive excitation is the dissociation of single nucleons.
Databáze: Supplemental Index
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