Scaling and fragmentation distributions of beam remnants in high Et proton-proton collisions at √s =27.4 GeV

Abstract Charged particle trajectories have been reconstructed in pp collisions triggered by transverse energies ( E t ) ranging from 1 GeV to 20 GeV. The forward fragmentation function of negative particles in the beam jet is found to scale with E t in variable x =2 p L /√ s − E t , and the slope is near to that found for small jet triggers in an earlier experiment. Above about E t =8 GeV, positive particles scale and for 0.5 x E t do not show the behavior expected from the fragmentation of diquarks and are more like that from quarks. Multiplicity and energy flow in various forward polar angle regions are also presented; they are compared to the beam jet predictions of ISAJET and found to be greater at wide angles and less at small.