Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at <span class="latex"><span class="ss">ace="symbol">脰s = 0.9span><span class="cs"><span class="math">\sqrt{s} = 0.9 span>span>span> an
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摘要
Measurements of inclusive charged-hadron transverse-momentum and pseudorapidity distributions are presented for proton-proton collisions at 脰s = 0.9\sqrt{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 卤 0.01 (stat.) 卤 0.01 (syst.) GeV/c at 0.9 TeV and 0.50 卤 0.01 (stat.) 卤 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, dN <sub>chsub>/dη|<sub>|η|sub><0.5, are 3:48 卤 0:02 (stat.) 卤 0.13 (syst.) and 4:47 卤 0:04 (stat.) 卤 0.16 (syst.), respectively. The results at 0.9 TeV are in agreement with previous measurements and confirm the expectation of near equal hadron production in [`(p)] p \overline p p and pp collisions. The results at 2.36 TeV represent the highest-energy measurements at a particle collider to date.

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