Measurement of the pseudorapidity dependence of the energy and transverse energy density in pp collisions at $\sqrt{s}=13~\mathrm{TeV}$ with CMS

The measurement of the energy flow is presented in the pseudorapidity range $3.15 < |\eta| < 6.6$ in proton-proton collisions at the LHC for the centre-of-mass energy of $\sqrt{s}=13~\mathrm{TeV}$. The data have been obtained during several periods of low luminosity operation in 2015. The energy flow, $\mathrm{d}E/\mathrm{d}\eta$, as well as the transverse energy density, $\mathrm{d}E_\mathrm{T}/\mathrm{d}\eta$, are studied as a function of pseudorapidity for soft-inclusive-inelastic and non-single-diffractive-enhanced events. The results are compared to models tuned to describe high-energy hadronic interactions and to earlier pp data at $\sqrt{s}=900~\mathrm{GeV}$ and $7~\mathrm{TeV}$. Comparison to the earlier data allows to test the hypothesis of the limiting fragmentation.