Results on two-particle angular correlations for charged particles emitted in proton-proton collisions at center-of-mass energies of 0.9, 2.36, and 7TeV are presented, using data collected with the CMS detector over a broad range of pseudorapidity (eta) and azimuthal angle (phi). Short-range correlations in Delta(eta), which are studied in minimum bias events, are characterized using a simple "independent cluster" parametrization in order to quantify their strength (cluster size) and their extent in eta (cluster decay width). Long-range azimuthal correlations are studied differentially as a function of charged particle multiplicity and particle transverse momentum using a 980 nb(-1) data set at 7TeV. In high multiplicity events, a pronounced structure emerges in the two-dimensional correlation function for particle pairs with intermediate p(T) of 1-3 GeV/c, 2.0
Observation of long-range, near-side angular correlations in proton-proton collisions at the LHC
A. Pin;A. Santoro;Z. Wang;M. Galanti;F. Ferri;L. Bianchini;E. Conte;C. Ferro;M. Weber;S. Jain;S. Jain;M. Maggi;F. Romano;A. M. Rossi;S. Paoletti;L. Di Matteo;A. Ghezzi;M. Paganoni;C. Viviani;M. Grassi;E. Longo;A. Palma;R. Arcidiacono;M. Arneodo;C. Mariotti;E. Migliore;M. M. Obertino;M. Ruspa;V. Sola;A. David;G. Polese;M. Weber;P. Bell;M. A. Borgia;F. Giordano;S. Shrestha;E. Barberis;G. Bolla;
2010-01-01
Abstract
Results on two-particle angular correlations for charged particles emitted in proton-proton collisions at center-of-mass energies of 0.9, 2.36, and 7TeV are presented, using data collected with the CMS detector over a broad range of pseudorapidity (eta) and azimuthal angle (phi). Short-range correlations in Delta(eta), which are studied in minimum bias events, are characterized using a simple "independent cluster" parametrization in order to quantify their strength (cluster size) and their extent in eta (cluster decay width). Long-range azimuthal correlations are studied differentially as a function of charged particle multiplicity and particle transverse momentum using a 980 nb(-1) data set at 7TeV. In high multiplicity events, a pronounced structure emerges in the two-dimensional correlation function for particle pairs with intermediate p(T) of 1-3 GeV/c, 2.0File | Dimensione | Formato | |
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