Charged particle transverse momentum spectra in pp collisions at root s=0.9 and 7 TeV

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Abstract

The charged particle transverse momentum (p(T)) spectra are presented for pp collisions at root s = 0.9 and 7 TeV. The data samples were collected with the CMS detector at the LHC and correspond to integrated luminosities of 231 mu b(-1) and 2.96 pb(-1), respectively. Calorimeter-based high-transverse-energy triggers are employed to enhance the statistical reach of the high-p(T) measurements. The results are compared with leading and next-to-leading order QCD and with an empirical scaling of measurements at different collision energies using the scaling variable x(T) equivalent to 2p(T)/root s over the p(T) range up to 200 GeV/e. Using a combination of xi, scaling and direct interpolation at fixed p(T), a reference transverse momentum spectrum at root s = 2.76 TeV is constructed, which can be used for studying high-p(T) particle suppression in the dense QCD medium produced in heavy-ion collisions at that centre-of-mass energy.

Autore Pugliese

Tutti gli autori

  • POMPILI A.;MARANGELLI B.;CALABRIA C.;SELVAGGI G.;BARBONE L.;ABBRESCIA M.;DE PALMA M.;PACIFICO N.;MY S.;NUZZO S.V.

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2011

ISSN

1029-8479

ISBN

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Numero di citazioni Wos

Nessuna citazione

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Numero di citazioni Scopus

43

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Settori ERC

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Codici ASJC

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