Searches for Extra Dimensions and for Heavy Resonances in Dilepton,\n Diphoton, Electron + Photon and Electron + Missing ET Final States with the\n D0 Detector

The high mass spectrum of lepton and photon pairs is sensitive to a broad\narray of new physics. Examples include searches for extra dimensions in the\ndielectron and diphoton channels. A direct search for electron compositeness is\npossible in the production of excited electrons decaying into an electron and a\nphoton. In addition, the electron plus missing transverse energy data sample\ncan be searched for a W' boson. Latest results in searches in the high mass\ndielectron, diphoton, electron plus photon, and electron plus missing\ntransverse energy channels obtained by the D0 experiment at the Tevatron are\nreported, using a data set corresponding to an integrated luminosity of about 1\ninverse femtobarn. Since no significant excess is observed in the data in all\ncases, limits are set which improve on previous searches.\n