Results on two-particle angular correlations for charged particles produced in pp collisions at a center-of- mass energy of 13 TeV are presented. The data were taken with the CMS detector at the LHC and correspond to an integrated luminosity of about 270 nb(-1). The correlations are studied over a broad range of pseudorapidity (vertical bar eta vertical bar < 2.4) and over the full azimuth (phi) as a function of charged particle multiplicity and transverse momentum (p(T)). In high-multiplicity events, a long-range (vertical bar Delta eta vertical bar > 2.0), near-side (Delta phi approximate to 0) structure emerges in the two-particle Delta eta-Delta phi correlation functions. The magnitude of the correlation exhibits a pronounced maximum in the range 1.0 < p(T) < 2.0 GeV/c and an approximately linear increase with the charged particle multiplicity, with an overall correlation strength similar to that found in earlier pp data at root s = 7 TeV. The present measurement extends the study of near-side long-range correlations up to charged particle multiplicities N-ch similar to 180, a region so far unexplored in pp collisions. The observed longrange correlations are compared to those seen in pp, pPb, and PbPb collisions at lower collision energies.

Measurement of Long-Range Near-Side Two-Particle Angular Correlations in pp Collisions at root s=13 TeV / Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Ero, J., Flechl, M., Friedl, M., Fruhwirth, R., Ghete, V.M., Hartl, C., Hormann, N., Hrubec, J., Jeitler, M., Knunz, V., Konig, A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 116:17(2016). [10.1103/PhysRevLett.116.172302]

Measurement of Long-Range Near-Side Two-Particle Angular Correlations in pp Collisions at root s=13 TeV

MARZOCCHI, BADDER;BARONE, Luciano Maria;D'IMPERIO, GIULIA;DEL RE, Daniele;GELLI, SIMONE;LONGO, Egidio;MARGAROLI, Fabrizio;ORGANTINI, Giovanni;PARAMATTI, Riccardo;PREIATO, FEDERICO;RAHATLOU, SHAHRAM;SANTANASTASIO, FRANCESCO;
2016

Abstract

Results on two-particle angular correlations for charged particles produced in pp collisions at a center-of- mass energy of 13 TeV are presented. The data were taken with the CMS detector at the LHC and correspond to an integrated luminosity of about 270 nb(-1). The correlations are studied over a broad range of pseudorapidity (vertical bar eta vertical bar < 2.4) and over the full azimuth (phi) as a function of charged particle multiplicity and transverse momentum (p(T)). In high-multiplicity events, a long-range (vertical bar Delta eta vertical bar > 2.0), near-side (Delta phi approximate to 0) structure emerges in the two-particle Delta eta-Delta phi correlation functions. The magnitude of the correlation exhibits a pronounced maximum in the range 1.0 < p(T) < 2.0 GeV/c and an approximately linear increase with the charged particle multiplicity, with an overall correlation strength similar to that found in earlier pp data at root s = 7 TeV. The present measurement extends the study of near-side long-range correlations up to charged particle multiplicities N-ch similar to 180, a region so far unexplored in pp collisions. The observed longrange correlations are compared to those seen in pp, pPb, and PbPb collisions at lower collision energies.
2016
TRANSVERSE-MOMENTUM DEPENDENCE; PLUS PB COLLISIONS; ROOT-S(NN)=5.02 TEV; CHARGED-PARTICLES; ATLAS DETECTOR; FLOW; LHC
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of Long-Range Near-Side Two-Particle Angular Correlations in pp Collisions at root s=13 TeV / Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Ero, J., Flechl, M., Friedl, M., Fruhwirth, R., Ghete, V.M., Hartl, C., Hormann, N., Hrubec, J., Jeitler, M., Knunz, V., Konig, A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 116:17(2016). [10.1103/PhysRevLett.116.172302]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/897573
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