Search forZ′→e+e−Using Dielectron Mass and Angular Distribution

A. Abulencia, D. Acosta, J. Adelman, T. Affolder, T. Akimoto, M. G. Albrow, D. Ambrose, S. Amerio, D. Amidei, A. Anastassov, K. Anikeev, A. Annovi (+616 others)
2006 Physical Review Letters  
We search for Z' bosons in dielectron events produced in ppbar collisions at sqrt{s}=1.96 TeV, using a 0.45 fb^(-1) dataset accumulated with the CDF II detector at the Fermilab Tevatron. To identify the Z' --> e^+e^- signal, both the dielectron invariant mass distribution and the angular distribution of the electron pair are used. No evidence of a signal is found, and 95% confidence level lower limits are set on the Z' mass for several models. Limits are also placed on the mass and gauge
more » ... ss and gauge coupling of a generic Z', as well as on the contact interaction mass scales for different helicity structure scenarios.
doi:10.1103/physrevlett.96.211801 pmid:16803227 fatcat:mppgbt3vhbgcliohp4h3f3cxwe