Abstract

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.

Autore Pugliese

• Pompili Alexis , Selvaggi Giovanna , Abbrescia Marcello , De Palma Mauro , Nuzzo Salvatore Vitale

Tutti gli autori

• POMPILI A.;SELVAGGI G.;ABBRESCIA M.;DE PALMA M.;NUZZO S.V.

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2010

ISSN

1126-6708

ISBN

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Numero di citazioni Wos

141

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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