CMS Collaboration, Boulahouache, C., Ecklund, K.M., et al.. "Measurement of energy flow at large pseudorapidities in pp collisions at √s=0.9 and 7 TeV." Journal of High Energy Physics, 2011, no. 148 (2011) Springer: http://dx.doi.org/10.1007/JHEP11(2011)148.
The energy flow, dE/dη, is studied at large pseudorapidities in proton-proton collisions at the LHC, for centre-of-mass energies of 0.9 and 7 TeV. The measurements are made using the CMS detector in the pseudorapidity range 3.15 < |η| < 4.9, for both minimum-bias events and events with at least two high-momentum jets. The data are compared to various pp Monte Carlo event generators whose theoretical models and input parameter values are sensitive to the energy-flow measurements. Inclusion of multiple-parton interactions in the Monte Carlo event generators is found to improve the description of the energy-flow measurements.
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