Evidence For Transverse Momentum And Pseudorapidity Dependent Event Plane Fluctuations In Pbpb And Ppb Collisions
DOWNLOAD
Download Evidence For Transverse Momentum And Pseudorapidity Dependent Event Plane Fluctuations In Pbpb And Ppb Collisions PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Evidence For Transverse Momentum And Pseudorapidity Dependent Event Plane Fluctuations In Pbpb And Ppb Collisions book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Evidence For Transverse Momentum And Pseudorapidity Dependent Event Plane Fluctuations In Pbpb And Ppb Collisions
DOWNLOAD
Author :
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.
Observation Of Charge Dependent Azimuthal Correlations In Ppb Collisions And Its Implication For The Search For The Chiral Magnetic Effect
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2016
Observation Of Charge Dependent Azimuthal Correlations In Ppb Collisions And Its Implication For The Search For The Chiral Magnetic Effect 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.
Charge-dependent azimuthal particle correlations with respect to the second-order event plane in pPb and PbPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV have been studied with the CMS experiment at the LHC. The measurement is performed with a three-particle correlation technique, using two particles with the same or opposite charge within the pseudorapidity range abs(eta)
Energy Dependence Of Transverse Momentum Fluctuations In Pb Pb Collisions At The Cern Super Proton Synchrotron Sps At 20a To 158a Gev
DOWNLOAD
Author :
language : en
Publisher:
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
Measurements Of Charged Particle Transverse Momentum Spectra In Pbpb Collisions At Square Root Of Nn
DOWNLOAD
Author : Eric Appelt
language : en
Publisher:
Release Date : 2014
Measurements Of Charged Particle Transverse Momentum Spectra In Pbpb Collisions At Square Root Of Nn written by Eric Appelt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Collisions (Nuclear physics) categories.
Studies Of Azimuthal Dihadron Correlations In Ultra Central Pbpb Collisions At Sqrt S Nn
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2014
Studies Of Azimuthal Dihadron Correlations In Ultra Central Pbpb Collisions At Sqrt S 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.
Azimuthal dihadron correlations of charged particles have been measured in PbPb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV by the CMS collaboration, using data from the 2011 LHC heavy-ion run. The data set includes a sample of ultra-central (0-0.2% centrality) PbPb events collected using a trigger based on total transverse energy in the hadron forward calorimeters and the total multiplicity of pixel clusters in the silicon pixel tracker. A total of about 1.8 million ultra-central events were recorded, corresponding to an integrated luminosity of 120 inverse microbarns. The observed correlations in ultra-central PbPb events are expected to be particularly sensitive to initial-state fluctuations. The single-particle anisotropy Fourier harmonics, from $v_2$ to $v_6$, are extracted as a function of particle transverse momentum. At higher transverse momentum, the $v_2$ harmonic becomes significantly smaller than the higher-order $v_n$ (n greater than or equal to 3). The pt-averaged $v_2$ and $v_3$ are found to be equal within 2%, while higher-order $v_n$ decrease as n increases. The breakdown of factorization of dihadron correlations into single-particle azimuthal anisotropies is observed. This effect is found to be most prominent in the ultra-central PbPb collisions, where the initial-state fluctuations play a dominant role. As a result, a comparison of the factorization data to hydrodynamic predictions with event-by-event fluctuating initial conditions is also presented.
Azimuthal Anisotropy Of Charged Particles With Transverse Momentum Up To 100 Gev In Pbpb Collisions At Sqrt S Nn
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2017
Azimuthal Anisotropy Of Charged Particles With Transverse Momentum Up To 100 Gev In Pbpb Collisions At Sqrt S 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 2017 with categories.
The Fourier coefficients v[2] and v[3] characterizing the anisotropy of the azimuthal distribution of charged particles produced in PbPb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV are measured with data collected by the CMS experiment. The measurements cover a broad transverse momentum range, pt= 1-100 GeV. The analysis focuses on pt> 10 GeV range, where anisotropic azimuthal distributions should reflect the path-length dependence of parton energy loss in the created medium. Results are presented in several bins of PbPb collision centrality, spanning the 60x% most central events. The v[2] coefficient is measured with the scalar product and the multiparticle cumulant methods, which have different sensitivities to the initial-state fluctuations. The values of both methods remain positive up to pt ~ 70 GeV, in all examined centrality classes. The v[3] coefficient, only measured with the scalar product method, tends to zero for pt>~ 20 GeV. Comparisons between theoretical calculations and data provide new constraints on the path-length dependence of parton energy loss in heavy ion collisions and highlight the importance of the initial-state fluctuations.
Azimuthal Anisotropy Of Charged Particles At High Transverse Momenta In Pbpb Collisions At Sqrt S Nn
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2012
Azimuthal Anisotropy Of Charged Particles At High Transverse Momenta In Pbpb Collisions At Sqrt S 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 2012 with categories.
The azimuthal anisotropy of charged particles in PbPb collisions at nucleon-nucleon center-of-mass energy of 2.76 TeV is measured with the CMS detector at the LHC over an extended transverse momentum (pt) range up to approximately 60 GeV. The data cover both the low-pt region associated with hydrodynamic flow phenomena and the high-pt region where the anisotropies may reflect the path-length dependence of parton energy loss in the created medium. The anisotropy parameter (v2) of the particles is extracted by correlating charged tracks with respect to the event-plane reconstructed by using the energy deposited in forward-angle calorimeters. For the six bins of collision centrality studied, spanning the range of 0-60% most-central events, the observed v2 values are found to first increase with pt, reaching a maximum around pt = 3 GeV, and then to gradually decrease to almost zero, with the decline persisting up to at least pt = 40 GeV over the full centrality range measured.
Studies Of Dijet Transverse Momentum Balance And Pseudorapidity Distributions In Ppb Collisions At Sqrt S Mathrm Nn
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2014
Studies Of Dijet Transverse Momentum Balance And Pseudorapidity Distributions In Ppb Collisions At Sqrt S Mathrm 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.
Dijet production has been measured in pPb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. A data sample corresponding to an integrated luminosity of 35 inverse-nanobarns was collected using the Compact Muon Solenoid detector at the Large Hadron Collider. The dijet transverse momentum balance, azimuthal angle correlations, and pseudorapidity distributions are studied as a function of the transverse energy in the forward calorimeters ($E_T^{4\lt.
Studies Of Dijet Pseudorapidity Distributions And Transverse Momentum Balance In Ppb Collisions At Sqrt S Nn
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2014
Studies Of Dijet Pseudorapidity Distributions And Transverse Momentum Balance In Ppb Collisions At Sqrt S 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.
Nuclear Effects On The Transverse Momentum Spectra Of Charged Particles In Ppb Collisions At Sqrt S Mathrm Nn
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2015
Nuclear Effects On The Transverse Momentum Spectra Of Charged Particles In Ppb Collisions At Sqrt S Mathrm 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 2015 with categories.
Transverse momentum spectra of charged particles are measured by the CMS experiment at the CERN LHC in pPb collisions at [arrow]"NN = 5.02 TeV, in the range 0.4