Abstract
We present the results of a search for the production of an excited state of the muon, , in proton antiproton collisions at . The data have been 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 a muon plus photon. No excess above the standard model expectation is observed in data. Interpreting our data in the context of a model that describes production by four-fermion contact interactions and decay via electroweak processes, we set a 95% confidence level production cross section upper limit ranging from 0.057 to 0.112 pb, depending on the mass of the excited muon. Choosing the scale for contact interactions to be , excited muon masses below 618 GeV are excluded.
- Received 19 April 2006
DOI:https://doi.org/10.1103/PhysRevD.73.111102
©2006 American Physical Society