Spires | EPJ C75,126 | CERN-PH-EP-2014-260 | arxiv:1411.4963
The the pseudorapidity density of charged particles dN$_{ch}$/d$\eta$ is measured by the TOTEM experiment in pp collisions at sqrt(s) = 8 TeV within the range 3.9 < $\eta$ < 4.7 and -6.95 < $\eta$ < -6.9. Data were collected in a low intensity LHC run with collisions occurring at a distance of 11.25 m from the nominal interaction point. The data sample is expected to include 96-97% of the inelastic proton-proton interactions. The measurement reported here considers charged particles with $P_T$ > 0 MeV/c, produced in inelastic interactions with at least one charged particle in -7 < $\eta$ < -6 or 3.7< $\eta$ < 4.8. The dN$_{ch}$/d$\eta$ has been found to decrease with |$\eta$|, from 5.11 +- 0.73 at $\eta$ = 3.95 to 1.81 +- 0.56 at $\eta$ = -6.925.
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