Measurement of the production cross section in 920 GeV fixed-target proton-nucleus collisionsThe HERA - B Collaboration
(Received: 6 June 2002 / Revised version: 2 September 2002 / Published online: 8 November 2002 )
Using the HERA - B detector, the production cross section has been measured in 920 GeV proton collisions on carbon and titanium targets. The production was tagged via inclusive bottom quark decays into by exploiting the longitudinal separation of decay vertices from the primary proton-nucleus interaction. Both e+e- and channels have been reconstructed and the combined analysis yields the cross section .
© Società Italiana di Fisica, Springer-Verlag 2003