Measurement of the forward energy flow in $pp$ collisions at $\sqrt{s}=7$ TeV with the LHCb detector

We present the results on the energy flow measured with minimum-bias data collected by the LHCb experiment in pp collisions at $\sqrt{s}=7$ TeV for inclusive minimum-bias interactions, hard scattering processes and events with enhanced or suppressed diffractive contribution. The measurements are performed in the pseudorapidity range $1.9<\eta<4.9$, which corresponds to the main detector acceptance of the LHCb spectrometer. The data are compared to predictions given by the PYTHIA-based and cosmic-ray Monte Carlo event generators, which model the underlying event activity in different ways.