We present a measurement of two-particle angular correlations in proton-proton collisions at root s = 900 GeV and 7 TeV. The collision events were collected during 2009 and 2010 with the ATLAS detector at the Large Hadron Collider using a single-arm minimum bias trigger. Correlations are measured for charged particles produced in the kinematic range of transverse momentum p(T) > 100 MeV and pseudorapidity vertical bar eta vertical bar < 2.5. A complex structure in pseudorapidity and azimuth is observed at both collision energies. Results are compared to PYTHIA 8 and HERWIG++ as well as to the AMBT2B, DW and Perugia 2011 tunes of PYTHIA 6. The data are not satisfactorily described by any of these models. RI Fazio, Salvatore /G-5156-2010; Livan, Michele/D-7531-2012; Alexa, Calin/F-6345-2010; Takai, Helio/C-3301-2012; Doyle, Anthony/C-5889-2009; Petrucci, Fabrizio/G-8348-2012; Smirnov, Sergei/F-1014-2011; Wemans, Andre/A-6738-2012; Jones, Roger/H-5578-2011; Fabbri, Laura/H-3442-2012; Kurashige, Hisaya/H-4916-2012; Villa, Mauro/C-9883-2009; valente, paolo/A-6640-2010; Delmastro, Marco/I-5599-2012

Measurement of inclusive two-particle angular correlations in pp collisions with the ATLAS detector at the LHC

CALDERINI, GIOVANNI;CAVASINNI, VINCENZO;Francavilla P;RODA, CHIARA MARIA ANGELA;Verducci, M.;
2012-01-01

Abstract

We present a measurement of two-particle angular correlations in proton-proton collisions at root s = 900 GeV and 7 TeV. The collision events were collected during 2009 and 2010 with the ATLAS detector at the Large Hadron Collider using a single-arm minimum bias trigger. Correlations are measured for charged particles produced in the kinematic range of transverse momentum p(T) > 100 MeV and pseudorapidity vertical bar eta vertical bar < 2.5. A complex structure in pseudorapidity and azimuth is observed at both collision energies. Results are compared to PYTHIA 8 and HERWIG++ as well as to the AMBT2B, DW and Perugia 2011 tunes of PYTHIA 6. The data are not satisfactorily described by any of these models. RI Fazio, Salvatore /G-5156-2010; Livan, Michele/D-7531-2012; Alexa, Calin/F-6345-2010; Takai, Helio/C-3301-2012; Doyle, Anthony/C-5889-2009; Petrucci, Fabrizio/G-8348-2012; Smirnov, Sergei/F-1014-2011; Wemans, Andre/A-6738-2012; Jones, Roger/H-5578-2011; Fabbri, Laura/H-3442-2012; Kurashige, Hisaya/H-4916-2012; Villa, Mauro/C-9883-2009; valente, paolo/A-6640-2010; Delmastro, Marco/I-5599-2012
2012
Aad, G; Abbott, B; Abdallah, J; Abdelalim, Aa; Abdesselam, A; Abdinov, O; Abi, B; Abolins, M; Abouzeid, Os; Abramowicz, H; Abreu, H; Acerbi, E; Achary...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/158392
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