Khachatryan VSirunyan AMTumasyan AAdam WBergauer TDragicevic MErö JFriedl MFrühwirth RGhete VMHammer JHänsel SHoch MHörmann NHrubec JJeitler MKasieczka GKrammer MLiko DMikulec IPernicka MRohringer HSchöfbeck RStrauss JTaurok ATeischinger FWaltenberger WWalzel GWidl EWulz CEMossolov VShumeiko NSuarez Gonzalez JBenucci LDe Wolf EAHashemi MJanssen XMaes TMucibello LOchesanu SRougny RSelvaggi MVan Haevermaet HVan Mechelen PVan Remortel NAdler VBeauceron SD’Hondt JDevroede OKalogeropoulos AMaes JMozer MUTavernier SVan Doninck WVan Mulders PVillella IChabert ECCharaf OClerbaux BDe Lentdecker GDero VGay APRHammad GHMarage PEVander Velde CVanlaer PWickens JGrunewald MKlein BMarinov ARyckbosch DThyssen FTytgat MVanelderen LVerwilligen PWalsh SBasegmez SBruno GCaudron JCortina Gil EDe Favereau De Jeneret JDelaere CDemin PFavart DGiammanco AGrégoire GHollar JLemaitre VMaltoni FMilitaru OOvyn SPiotrzkowski KQuertenmont LSchul NBeliy NCaebergs TDaubie EHerquet PAlves GAPol ME1/02/20101/01/2010JOURNAL OF HIGH ENERGY PHYSICS, 2010, (2), pp. ? - ? (35)1029-8479https://hdl.handle.net/10179/10021Measurements of inclusive charged-hadron transverse-momentum and pseudorapidity distributions are presented for proton-proton collisions at √s = 0.9 and 2.36 TeV. The data were collected with the CMS detector during the LHC commissioning in December 2009. For non-single-diffractive interactions, the average charged-hadron transverse momentum is measured to be 0:46 ± 0:01 (stat.) ± 0.01 (syst.) GeV/c at 0.9 TeV and 0:50 ± 0:01 (stat.) ± 0.01 (syst.) GeV/c at 2.36 TeV, for pseudorapidities between -2:4 and +2:4. At these energies, the measured pseudorapidity densities in the central region, dNch/dη| |η|>0.5, are 3:48±0:02 (stat.) ± 0.13 (syst.) and 4:47±0:04 (stat.) ± 0.16 (syst.), respectively. The results at 0.9 TeV are in agreement with previous measurements and con- firm the expectation of near equal hadron production in pp̄ and pp collisions. The results at 2.36 TeV represent the highest-energy measurements at a particle collider to date.? - ? (35)Science & TechnologyPhysical SciencesPhysics, Particles & FieldsPhysicsPHYSICS, PARTICLES & FIELDSHadron-Hadron ScatteringSQUARE-ROOT-SPARTICLE MULTIPLICITYCM ENERGIESDIFFRACTIONDEPENDENCEJournal article10.1007/JHEP02(2010)041249580Massey_Dark0105 Mathematical Physics0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics0206 Quantum Physics