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First measurement of the underlying event activity at the LHC with v = 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 s?=0.9?=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 |?|<2, p T >0.5 GeV/c, and azimuthal direction transverse to that of the leading object.

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Autoría: Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., Bergauer T., Dragicevic M., Erö J., Fabjan C., Friedl M., Frühwirth R., Ghete V.M., Hammer J., Hänsel S., Hoch M., Hörmann N., Hrubec J., Jeitler M., Kasieczka G., Kiesenhofer W., Krammer M., Liko D., Mikulec I., Pernicka M., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Teischinger F., Waltenberger W., Walzel G., Widl E., Wulz C.E., Mossolov V., Shumeiko N., Suarez Gonza

Fuente: European Physical Journal C, 2010, 70(3), 555-572

Editorial: Springer

Fecha de publicación: 01/12/2010

Nº de páginas: 18

Tipo de publicación: Artículo de Revista

DOI: 10.1140/epjc/s10052-010-1453-9

ISSN: 1434-6044,1434-6052

Url de la publicación: https://doi.org/10.1140/epjc/s10052-010-1453-9

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