contributions/lhcf/lhcf.tex

@@ -26,7 +26,7 @@ The LHCf detector is made of two independent electromagnetic calorimeters placed
 \section{Results obtained in 2018}
 
 During 2018 no experimental operations were performed in LHC tunnel or SPS experimental area, so all the work was concentrated to the analysis of data collected during the 2015 operation in p-p collisions at 13 TeV and during 2016 operation in p-Pb collisions at 8.16 TeV.
-The final results of photon and neutron production spectra in proton-proton collisions at $\sqrt{s} =$ 13 TeV in the very forward region ($8.81 < \eta < 8.99$ and $\eta > 10.94$ for photons, $8.81 < \eta < 9.22$ and $\eta > 10.76$ for neutrons) were published on Physics Letters B and Journal of High Energy Physics, respectively \cite{LHCf_photons, LHCf_neutrons}.
+The final results of photon and neutron production spectra in proton-proton collisions at $\sqrt{s} =$ 13 TeV in the very forward region ($8.81 < \eta < 8.99$ and $\eta > 10.94$ for photons, $8.81 < \eta < 9.22$ and $\eta > 10.76$ for neutrons, where $\eta$ is the pseudorapidity of the particle\footnote{In accelerator experiments the pseudorapidity of a particle is defined as $\eta = - \ln [ \tan(\theta / 2) ]$, where $\theta$ is the angle between the particle momentum and the beam axis.}) were published on Physics Letters B and Journal of High Energy Physics, respectively \cite{LHCf_photons, LHCf_neutrons}.
 These are the first published results of the collaboration at the highest available collision energy of 13 TeV at the LHC.
 In addition to proton-proton results, preliminary results for photon spectrum in proton-lead collisions at $\sqrt{s_{NN}} = 8.16$ TeV were obtained and presented in several international conferences.