Abstract
We present an observation for (, or ) production in collisions at a center-of-mass energy of . Using of data collected by the D0 experiment at the Fermilab Tevatron Collider, we observe three candidate events with an expected background of events. The significance of this observation is 5.3 standard deviations. The combination of D0 results in this channel, as well as in , yields a significance of 5.7 standard deviations and a combined cross section of .
- Received 6 August 2008
DOI:https://doi.org/10.1103/PhysRevLett.101.171803
©2008 American Physical Society