Multiplicity And Transverse Momentum Evolution Of Charge Dependent Correlations In Pp P U2013 Pb And Pb U2013 Pb Collisions At The Lhc

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Multiplicity And Transverse Momentum Evolution Of Charge Dependent Correlations In Pp P U2013 Pb And Pb U2013 Pb Collisions At The Lhc

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Author :
language : en
Publisher:
Release Date : 2016

Multiplicity And Transverse Momentum Evolution Of Charge Dependent Correlations In Pp P U2013 Pb And Pb U2013 Pb Collisions At The Lhc written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

Here, we report on two-particle charge-dependent correlations in pp, p–Pb, and Pb–Pb collisions as a function of the pseudorapidity and azimuthal angle difference, ?? and ?? respectively. These correlations are studied using the balance function that probes the charge creation time and the development of collectivity in the produced system. The dependence of the balance function on the event multiplicity as well as on the trigger and associated particle transverse momentum (pT) in pp, p–Pb, and Pb–Pb collisions at √sNN = 7, 5.02, and 2.76 TeV, respectively, are presented. In the low transverse momentum region, for 0.2 psubT/sub 2.0 GeV/c, the balance function becomes narrower in both ?? and ?? directions in all three systems for events with higher multiplicity. The experimental findings favor models that either incorporate some collective behavior (e.g. AMPT) or different mechanisms that lead to effects that resemble collective behavior (e.g. PYTHIA8 with color reconnection). For higher values of transverse momenta the balance function becomes even narrower but exhibits no multiplicity dependence, indicating that the observed narrowing with increasing multiplicity at low p

Multiplicity Dependence Of Jet Like Two Particle Correlation Structures In P U2013 Pb Collisions At U221a Snn

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language : en
Publisher:
Release Date : 2014

Multiplicity Dependence Of Jet Like Two Particle Correlation Structures In P U2013 Pb Collisions At U221a Snn written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

Two-particle angular correlations between unidentified charged trigger and associated particles are measured by the ALICE detector in p–Pb collisions at a nucleon–nucleon centre-of-mass energy of 5.02 TeV. The transverse-momentum range 0.7 psubT,assoc/sub p

Multiplicity Dependence Of Jet Like Two Particle Correlation Structures In P Pb Collisions At Arrow Nn

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language : en
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Release Date : 2014

Multiplicity Dependence Of Jet Like Two Particle Correlation Structures In P Pb Collisions At Arrow Nn written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

Two-particle angular correlations between unidentified charged trigger and associated particles are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The transverse-momentum range 0.7

Multiplicity Dependence Of Jet Like Two Particle Correlation Structures In P Pb Collisions At Mml

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Author :
language : en
Publisher:
Release Date : 2014

Multiplicity Dependence Of Jet Like Two Particle Correlation Structures In P Pb Collisions At Mml written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

Two-particle angular correlations between unidentified charged trigger and associated particles are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The transverse-momentum range 0.7

Multiparticle Azimuthal Correlations In P Pb And Pb Pb Collisions At The Cern Large Hadron Collider

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language : en
Publisher:
Release Date : 2014

Multiparticle Azimuthal Correlations In P Pb And Pb Pb Collisions At The Cern Large Hadron Collider written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

Our measurements of multiparticle azimuthal correlations (cumulants) for charged particles in p-Pb at √sNN=5.02 TeV and Pb-Pb at √sNN=2.76 TeV collisions are presented. They help address the question of whether there is evidence for global, flowlike, azimuthal correlations in the p-Pb system. These comparisons are made to measurements from the larger Pb-Pb system, where such evidence is established. In particular, the second harmonic two-particle cumulants are found to decrease with multiplicity, characteristic of a dominance of few-particle correlations in p-Pb collisions. However, when a.

Evidence For Collective Multiparticle Correlations In P Pb Collisions

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language : en
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Release Date : 2015

Evidence For Collective Multiparticle Correlations In P Pb Collisions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

The second-order azimuthal anisotropy Fourier harmonics, v2, are obtained in p-Pb and PbPb collisions over a wide pseudorapidity ([eta]) range based on correlations among six or more charged particles. The p-Pb data, corresponding to an integrated luminosity of 35 nb-1, were collected during the 2013 LHC p-Pb run at a nucleon-nucleon center-of-mass energy of 5.02 TeV by the CMS experiment. A sample of semiperipheral PbPb collision data at √sNN=2.76 TeV, corresponding to an integrated luminosity of 2.5 [mu]b-1 and covering a similar range of particle multiplicities as the p-Pb data, is also analyzed for comparison. The six- and eight-particle cumulant and the Lee-Yang zeros methods are used to extract the v2 coefficients, extending previous studies of two- and four-particle correlations. For both the p-Pb and PbPb systems, the v2 values obtained with correlations among more than four particles are consistent with previously published four-particle results. These data support the interpretation of a collective origin for the previously observed long-range (large [Delta][eta]) correlations in both systems. The ratios of v2 values corresponding to correlations including different numbers of particles are compared to theoretical predictions that assume a hydrodynamic behavior of a p-Pb system dominated by fluctuations in the positions of participant nucleons. These results provide new insights into the multiparticle dynamics of collision systems with a very small overlapping region.

Energy Dependence Of Transverse Momentum Fluctuations In Pb Pb Collisions At The Cern Super Proton Synchrotron Sps At 20a To 158a Gev

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language : en
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Release Date : 2009

Energy Dependence Of Transverse Momentum Fluctuations In Pb Pb Collisions At The Cern Super Proton Synchrotron Sps At 20a To 158a Gev written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

Results are presented on event-by-event fluctuations of transverse momenta p{sub T} in central Pb+Pb interactions at 20A, 30A, 40A, 80A, and 158A GeV. The analysis was performed for charged particles at forward center-of-mass rapidity (1.1

Correlations Between The Production Of Prompt Positrons At Low Transverse Momentum And The Associated Charged Multiplicity

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language : en
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Release Date : 1986

Correlations Between The Production Of Prompt Positrons At Low Transverse Momentum And The Associated Charged Multiplicity written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.

The production of prompt positrons in pp-collisions at .sqrt.s = 63 GeV and y - 0 has been measured as a function of the associated charged particle multiplicity over the P/sub T/ internal 0.12

Rapidity And Transverse Momentum Dependence Of The Inclusive J Psi Nuclear Modification Factor In P Pb Collisions At Sqrt S N N

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language : en
Publisher:
Release Date : 2015

Rapidity And Transverse Momentum Dependence Of The Inclusive J Psi Nuclear Modification Factor In P Pb Collisions At Sqrt S N N written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

Here we have studied the transverse-momentum (pT) dependence of the inclusive J/$\psi$ production in p-Pb collisions at root $\sqrt{s_{N\ N}}$ = 5.02 TeV, in three center-of-mass rapidity (ycms) regions, down to zero pT. Results in the forward and backward rapidity ranges (2.03

Evidence For Transverse Momentum And Pseudorapidity Dependent Event Plane Fluctuations In Pbpb And Ppb Collisions

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language : en
Publisher:
Release Date : 2015

Evidence For Transverse Momentum And Pseudorapidity Dependent Event Plane Fluctuations In Pbpb And Ppb Collisions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

A systematic study of the factorization of long-range azimuthal two-particle correlations into a product of single-particle anisotropies is presented as a function of pT and [eta] of both particles and as a function of the particle multiplicity in PbPb and pPb collisions. The data were taken with the CMS detector for PbPb collisions at √sNN=2.76 TeV and pPb collisions at √sNN=5.02 TeV, covering a very wide range of multiplicity. Factorization is observed to be broken as a function of both particle pT and [eta]. When measured with particles of different pT, the magnitude of the factorization breakdown for the second Fourier harmonic reaches 20% for very central PbPb collisions but decreases rapidly as the multiplicity decreases. The data are consistent with viscous hydrodynamic predictions, which suggest that the effect of factorization breaking is mainly sensitive to the initial-state conditions rather than to the transport properties (e.g., shear viscosity) of the medium. The factorization breakdown is also computed with particles of different [eta]. The effect is found to be weakest for mid-central PbPb events but becomes larger for more central or peripheral PbPb collisions, and also for very-high-multiplicity pPb collisions. The [eta]-dependent factorization data provide new insights to the longitudinal evolution of the medium formed in heavy ion collisions.