First measurement of the underlying event activity at the LHC with root s=0.9 TeV

Abstract

A measurement of the underlying activity in scattering processes with p (T) scale in the GeV region is performed in proton-proton collisions at root s = 0.9 TeV, using data collected by the CMS experiment at the LHC. Charged particle production is studied with reference to the direction of a leading object, either a charged particle or a set of charged particles forming a jet. Predictions of several QCD-inspired models as implemented in PYTHIA are compared, after full detector simulation, to the data. The models generally predict too little production of charged particles with pseudorapidity |eta|< 2, p (T) > 0.5 GeV/c, and azimuthal direction transverse to that of the leading object.


Tutti gli autori

  • SELVAGGI G.;NUZZO S.V.

Titolo volume/Rivista

Non Disponibile


Anno di pubblicazione

2010

ISSN

1434-6044

ISBN

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Numero di citazioni Wos

40

Ultimo Aggiornamento Citazioni

Non Disponibile


Numero di citazioni Scopus

44

Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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