Global properties of proton-proton collisions at s = 100 $$ sqrt{mathrm{s}}=100 $$ TeV

The global properties of the final states produced in hadronic interactions of protons at centre-of-mass energies of future hadron colliders (such as fcc-hh at cern, and sppc in china), are studied. the predictions of various monte carlo (mc) event generators used in collider physics (pythia 6, pythia 8, and phojet) and in ultrahigh-energy cosmic-rays studies (epos, and qgsjet) are compared. despite their different underlying modeling of hadronic interactions, their predictions for proton-proton (p-p) collisions at $$ sqrt{mathrm{s}}=100 $$ tev are quite similar. the average of all mc predictions (except phojet) for the different observables are: (i) p-p inelastic cross sections σ inel = 105 ± 2 mb; (ii) total charged multiplicity nch = 150 ± 20; (iii) charged particle pseudorapidity density at midrapidity dnch/dη| η=0 = 9.6 ± 0.2; (iv) energy density at midrapidity de/dη| η=0 = 13.6 ± 1.5 gev, and de/dη| η=5 = 670 ± 70 gev at the edge of the central region; and (v) average transverse momenta at midrapidities 〈pt〉 = 0.76 ± 0.07 gev/c. at midrapidity, epos and qgsjet-ii predict larger per-event multiplicity probabilities at very low (nch < 3) and very high (nch > 100) particle multiplicities, whereas pythia 6 and 8 feature higher yields in the intermediate region nch ≈ 30–80. these results provide useful information for the estimation of the detector occupancies and energy deposits from pileup collisions at the expected large fcc-hh/sppc luminosities.