Measurement of the underlying event activity at the LHC with √s = 7 TeV and comparison with √s = 0:9 TeV
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
01/12/2011
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Resumo |
A measurement of the underlying activity in events with a jet of transverse momentum in the several GeV region is performed in proton-proton collisions at √ s = 0:9 and 7TeV, using data collected by the CMS experiment at the LHC. The production of charged particles with pseudorapidity |η|<2 and transverse momentum pT >0:5 GeV/c is studied in the azimuthal region transverse to that of the leading set of charged particles forming a track-jet. A significant growth of the average multiplicity and scalar-pT sum of the particles in the transverse region is observed with increasing pT of the leading trackjet, followed by a much slower rise above a few GeV/c. For track-jet pT larger than a few GeV/c, the activity in the transverse region is approximately doubled with a centreof- mass energy increase from 0:9 to 7TeV. Predictions of several QCD-inspired models as implemented in pythia are compared to the data. |
Identificador |
http://dx.doi.org/10.1007/JHEP09(2011)109 Journal of High Energy Physics, v. 2011, n. 9, 2011. 1126-6708 1029-8479 http://hdl.handle.net/11449/72831 10.1007/JHEP09(2011)109 2-s2.0-84863282065 2-s2.0-84863282065.pdf |
Idioma(s) |
eng |
Relação |
Journal of High Energy Physics |
Direitos |
openAccess |
Palavras-Chave | #Hadron-hadron scattering |
Tipo |
info:eu-repo/semantics/article |