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Compact Muon Solenoid
LHC, CERN

CMS-PAS-FSQ-18-001
Measurement of the average very forward energy as a function of the track multiplicity at central rapidities in proton-proton collisions at $\sqrt{s}=$ 13 TeV
Abstract: The average total energy as well as the hadronic and electromagnetic components of it are measured with the CMS detector at pseudorapidities $ -6.6<\eta<-5.2 $ in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=$ 13 TeV. The results are presented as a function of the multiplicity of charged particle tracks in the region $|\eta|< $ 2. This measurement is sensitive to correlations induced by the underlying event structure over very wide pseudorapidity regions. We test Monte Carlo event generator predictions commonly used in collider and ultra-high energy cosmic ray physics with respect to these new data. It is very interesting that some of the most recent event generator tunes have the largest tension with respect to the data.
CMS Publications
Compact Muon Solenoid
LHC, CERN