Abstract
Pseudorapidity, transverse momentum, and multiplicity distributions are measured in the pseudorapidity range |eta | < 2.4 for charged particles with transverse momenta satisfying p_{mathrm {T}} > 0.5,text {GeV} in proton–proton collisions at a center-of-mass energy of sqrt{s} = 13,text {TeV} . Measurements are presented in three different event categories. The most inclusive of the categories corresponds to an inelastic mathrm {p}mathrm {p} data set, while the other two categories are exclusive subsets of the inelastic sample that are either enhanced or depleted in single diffractive dissociation events. The measurements are compared to predictions from Monte Carlo event generators used to describe high-energy hadronic interactions in collider and cosmic-ray physics.
Highlights
Inclusive measurements of charged particle pseudorapidity distributions, dNch/dη, and transverse momentum distributions, dNch/d pT, as well as charged particle multiplicities have been previously performed in proton–proton and prarnogtoen√-asnt=ip0ro.2to–n8 collisions TeV and in in the various center-of-mass energy phase space regions [1–19]
Event samples obtained from the event generators pythia8, pythia8 mbr, and epos are passed through the CMS detector simulation based on Geant4 [51], and are processed and reconstructed in the same manner as collision data
The following sources of systematic uncertainty are taken into account: tracking efficiency, description of the pileup modeling, sensitivity to the specific value used for the energy threshold applied to the hadron forward (HF) towers, and the dependence on the model used for the corrections
Summary
Inclusive measurements of charged particle pseudorapidity distributions, dNch/dη, and transverse momentum distributions, dNch/d pT, as well as charged particle multiplicities have been previously performed in proton–proton and prarnogtoen√-asnt=ip0ro.2to–n8 collisions TeV and in in the various center-of-mass energy phase space regions [1–. The present work extends those studies, for charged particles with pT > 0.5 GeV measured over the range |η| < 2.4, to cover the pseudorapidity density, and the per-event multiplicity probability, P(Nch), as well as different transverse-momentum distributions, such as that of the leading charged particle dNch/d pT, and its corresponding integrated spectrum, D( pT,min). Nevents is the number of selected events, N is the number of events with a leading charged particle with transverse momentum pT,leading, and pT,min is the lower limit of the integral. The measured distributions are presented for three different event data sets: an inelastic sample, a sample dominated.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call