Anomalies in the Nuclear Dissociation Cross Sections of 208Pb at 33 TeV
نویسندگان
چکیده
S. Datz,1 J. R. Beene,1 P. Grafström,2 H. Knudsen,3 H. F. Krause,1 R. H. Schuch,4 and C. R. Vane1 1Physics Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6377 2CERN, SPS/SL Division, Batiment 866, CH-1211, Geneva 23, Switzerland 3Institute of Physics and Astronomy, Aarhus University, DK-8000, Aarhus C, Denmark 4Atomic Physics Department, Stockholm University, Frescativägen 24, S-104 05, Stockholm, Sweden (Received 24 February 1997) We have measured total nuclear disintegration cross sections for 208Pb ions at 33 TeV s160-GeV Ad colliding with C, Si, Cu, Sn, and Pb. Using well established theory, we calculate the nuclear electromagnetic, electron electromagnetic, and the hadronic contributions and find that their sum underestimates the measured cross sections. An additive correction term linear in target ZT (i.e., 120ZT mb) is necessary to bring agreement between theory and experiment. The source of this additional term is unknown. [S0031-9007(97)04384-6]
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