Evidence for double diffractive excitation in pp (p+ ) + X at the CERN ISR and test of factorization
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In a magnetic spectrometer experiment at the CERN Intersecting Storage Rings (ISR), evidence is obtained for the existence of double diffractive excitation in the reaction pp (p+-) + X at pt2 = 0.03 GeV2 and S = 53 GeV. X is observed to be a multi-body low-mass system 12% of the time, in agreement with the same rate observed in pp p + X. 1975.