Study of Quark Substructure Using Proton-Proton Collisions

Two or more jets are frequently produced as a result of proton-proton collisions. The angular distribution of these jets can provide a wealth of information about the underlying interactions taking place as the protons collide. In this study, we use a simple observable called the dijet centrality ratio to examine this angular distribution, and search a 35.7 pb−1 sample of data at √s = 7 TeV from CERN’s Large Hadron Collider for evidence of quark substructure. We expect to set a 95% confidence limit on the energy scale of such interactions of Λ < 4.9 TeV and are in actuality able to set a limit of Λ < 4.6 TeV.