Abstract
We present the results of a search for the production of an excited state of the electron, , in proton-antiproton collisions at . The data were collected with the D0 experiment at the Fermilab Tevatron Collider and correspond to an integrated luminosity of approximately . We search for in the process , with the subsequently decaying to an electron plus photon. No excess above the standard model background is observed. Interpreting our data in the context of a model that describes production by four-fermion contact interactions and decay via electroweak processes, we set 95% C.L. upper limits on the production cross section ranging from 8.9 to 27 fb, depending on the mass of the excited electron. Choosing the scale for contact interactions to be , excited electron masses below 756 GeV are excluded at the 95% C.L.
- Received 6 January 2008
DOI:https://doi.org/10.1103/PhysRevD.77.091102
©2008 American Physical Society