Speaker
Description
Our investigation of high energy pp and p ̅p elastic scattering over the last two decades has
led us to consider that the proton has three regions: i) an outer region consisting of a
quark-antiquark (qq ̅) condensate ground state (also described as quark-antiquark outer
cloud), ii) an inner shell of baryonic charge of size ~0.44 fm, and iii) a core of size ~0.2 fm, where the three valence quarks of a proton with baryonic charges are confined. The proton structure that has emerged leads to four main elastic scattering processes in pp scattering. The first process, which gives rise to diffraction scattering, is due to a glancing collision of the outer cloud of one proton with that of another proton. In a p ̅p glancing collision the corresponding process occurs. The second process involves multiple ω-exchanges. The third process in pp scattering is quark-quark scattering via gluon-gluon interaction. The fourth process – which appears for the first time in our investigation of pp scattering – is a glancing collision at the boundary of a proton with that of the other proton. To describe quantitatively the four processes, their parameters have been determined. For this purpose, we investigated pp 7 TeV dσ⁄dt measured by the TOTEM Collaboration and p ̅p 1.96 TeV dσ⁄dt measured by the D0 Collaboration.
Our calculated pp elastic dσ⁄dt at 13 TeV has no oscillations in the large |t| region, in good agreement with the preliminary TOTEM measurements.
