Measurement of the Q2, W and t dependences of deeply virtual Compton scattering with ZEUS at HERA

Elastic deeply virtual Compton scattering, gamma* p -> gamma p, was measured 
with the ZEUS detector at HERA using an integrated luminosity of 61 pb-1. 
The data cover photon virtualities Q2 > 1.5 GeV2 and photon-proton 
centre-of-mass energies 40 < W < 170 GeV. The cross section is presented 
as a function of Q2 and W. The first direct measurement of the differential 
cross section as a function of the four-momentum transfer, t, is also 
presented. This was achieved using data from the ZEUS leading proton 
spectrometer available for an integrated luminosity of 31.1 pb-1.