Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at root s=0.9 and 2.36 TeV
(2010) The Journal of High Energy Physics — n° 2 (2010)
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- Measurements of inclusive charged-hadron transverse-momentum and pseudorapidity distributions are presented for proton-proton collisions at root 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, dN(ch)/d eta vertical bar(vertical bar eta vertical bar<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 confirm the expectation of near equal hadron production in p<(p)over bar> and pp collisions. The results at 2.36 TeV represent the highest-energy measurements at a particle collider to date.
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Khachatryan, V., Basegmez, S., Bruno, G., Caudron, J., Gil, E. C., De Jeneret, J. D. F., Delaere, C., Demin, P., Favart, D., Giammanco, A., Gregoire, G., Hollar, J., Lemaitre, V., Maltoni, F., Militaru, O., Ovyn, S., Piotrzkowski, K., Quertenmont, L., Schul, N., & et al. (2010). Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at root s=0.9 and 2.36 TeV. The Journal of High Energy Physics, 2. https://doi.org/10.1007/JHEP02(2010)041 (Original work published 2010)