A search for large extra dimensions in particle collisions at the DZero experiment in events characterized by a single jet and missing transverse energy

Theories proposed involving extra dimensions beyond our standard 4D spacetime have garnered attention for solving outstanding issues in physics and providing testable consequences. One theory suggests the existence of "large extra dimensions" accessible only by gravity (and not by the particles of the standard model) could provide a solution to the hierarchy problem. A consequence of this theory is that there should be massive "Kaluza-Klein" gravitons that may be evident in particle collisions. The research presented here is a search for evidence of these gravitons in 327 pb-1 of data collected by the D0 detector at Fermilab from pp collisions at a center-of-mass energy of 1.96 TeV. Events where a real Kaluza-Klein graviton is produced in conjunction with a quark or gluon result in an experimental signature consisting of a single hadronic jet (monojet) and missing transverse energy (ET). This analysis searched for an excess of these events over standard model predictions.