Speaker
Masahiro Kuze
Description
A search for events ep-> ep Z0 has been performed in ep collisions
at HERA using the ZEUS detector. The search is based on the entire HERA-I
and HERA-II data set, amounting to 0.49 fb-1 of integrated luminosity.
The Z0 was searched in the di-jet decay mode with elastic condition
defined by etamax < 3, where etamax
is defined as the pseudorapidity of the energy deposit in the calorimeter
closest to the proton beam direction.
A di-jet mass peak is observed at the Z0 mass and
the number of signal events is extracted from a fit to the mass spectrum.
The elastic Z0 production cross section is determined and compared to the SM
prediction.
