Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at s√=0.9 and 2.36 TeV

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Issue Date
2010-02-10Author
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Grachov, Oleg A.
Murray, Michael J.
Radicci, Valeria
Sanders, Stephen J.
Wood, Jeffrey Scott
Zhukova, Victoria
Khachatryan, V.
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Bergauer, T.
Dragicevic, M.
Publisher
Springer-Verlag
Type
Article
Article Version
Scholarly/refereed, publisher version
Metadata
Show full item recordAbstract
Measurements 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, dN (ch)/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 confirm the expectation of near equal hadron production in p-bar p and pp collisions. The results at 2.36 TeV represent the highest-energy measurements at a particle collider to date.
Description
This is the publisher's version, also available electronically from http://link.springer.com/article/10.1007%2FJHEP02%282010%29041.
ISSN
1029-8479Collections
Citation
Khachatryan, V. et al. (2010). "Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at s√=0.9 and 2.36 TeV." Journal of High Energy Physics, 02(2010):041. http://www.dx.doi.org/10.1007/JHEP02(2010)041.
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