Measurements Of Charged Particle Transverse Momentum Spectra In Pbpb Collisions At Square Root Of Nn
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Measurements Of Charged Particle Transverse Momentum Spectra In Pbpb Collisions At Square Root Of Nn
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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.
Measurement Of Charged Particle Spectra In Pb Pb Collisions At Sqrt S Mathrm Nn
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Author :
language : en
Publisher:
Release Date : 2015
Measurement Of Charged Particle Spectra In Pb Pb 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.
Charged-particle spectra obtained in Pb+Pb interactions at \(\sqrt{s_{\mathrm{NN}}}=2.76 \) TeV and pp interactions at \(\sqrt{s_{\mathrm{NN}}}=2.76 \) TeV with the ATLAS detector at the LHC are presented, using data with integrated luminosities of 0.15 nb−1 and 4.2 pb−1, respectively, in a wide transverse momentum (0.5
Nuclear Effects On The Transverse Momentum Spectra Of Charged Particles In Ppb Collisions At Sqrt S Mathrm Nn
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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
Charged Particle Transverse Momentum Spectra In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2011
Charged Particle Transverse Momentum Spectra In Pp Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
The charged particle transverse momentum (pT) spectra are presented for pp collisions at sqrt(s)=0.9 and 7 TeV. The data samples were collected with the CMS detector at the LHC and correspond to integrated luminosities of 231 inverse microbarns and 2.96 inverse picobarns, respectively. Calorimeter-based high-transverse-energy triggers are employed to enhance the statistical reach of the high-pT measurements. The results are compared with both leading-order QCD and with an empirical scaling of measurements at different collision energies using the scaling variable xT = 2 pT/sqrt(s) over the pT range up to 200 GeV/c. Using a combination of xT scaling and direct interpolation at fixed pT, a reference transverse momentum spectrum at sqrt(s)=2.76 TeV is constructed, which can be used for studying high-pT particle suppression in the dense QCD medium produced in heavy-ion collisions at that centre-of-mass energy.
Multiplicity And Rapidity Dependence Of Strange Hadron Production In Pp Ppb And Pbpb Collisions At The Lhc
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Author :
language : en
Publisher:
Release Date : 2016
Multiplicity And Rapidity Dependence Of Strange Hadron Production In Pp Ppb And Pbpb 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.
Measurements of strange hadron (K0s, Lambda + anti-Lambda, and Xi+ + Xi- ) transverse momentum spectra in pp, pPb, and PbPb collisions are presented over a wide range of rapidity and event charged-particle multiplicity. The data were collected with the CMS detector at the CERN LHC in pp collisions at sqrt(s) = 7 TeV, pPb collisions at sqrt(s[NN]) = 5.02 TeV, and PbPb collisions at sqrt(s[NN]) = 2.76 TeV. The average transverse kinetic energy is found to increase with multiplicity, at a faster rate for heavier strange particle species in all systems. At similar multiplicities, the difference in average transverse kinetic energy between different particle species is observed to be larger for pp and pPb events than for PbPb events. In pPb collisions, the average transverse kinetic energy is found to be slightly larger in the Pb-going direction than in the p-going direction for events with large multiplicity. The spectra are compared to models motivated by hydrodynamics.
Azimuthal Anisotropy Of Charged Particles With Transverse Momentum Up To 100 Gev In Pbpb Collisions At Sqrt S Nn
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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
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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.
Measurement Of Transverse Momentum Relative To Dijet Systems In Pbpb And Pp Collisions At Sqrt S Nn
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Author :
language : en
Publisher:
Release Date : 2015
Measurement Of Transverse Momentum Relative To Dijet Systems In Pbpb And Pp 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 2015 with categories.
An analysis of dijet events in PbPb and pp collisions is performed to explore the properties of energy loss by partons traveling in a quark-gluon plasma. Data are collected at a nucleon-nucleon center-of-mass energy of 2.76 TeV at the LHC. The distribution of transverse momentum (pT) surrounding dijet systems is measured by selecting charged particles in different ranges of pT and at different angular cones of pseudorapidity and azimuth. The measurement is performed as a function of centrality of the PbPb collisions, the pT asymmetry of the jets in the dijet pair, and the distance parameter R used in the anti-kT jet clustering algorithm. In events with unbalanced dijets, PbPb collisions show an enhanced multiplicity in the hemisphere of the subleading jet, with the pT imbalance compensated by an excess of low-pT particles at large angles from the jet axes.
Measurement Of Charged Particle Spectra In Pb Pb Collisions At Arrow Nn
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Author :
language : en
Publisher:
Release Date : 2015
Measurement Of Charged Particle Spectra In Pb 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 2015 with categories.
Charged-particle spectra obtained in Pb+Pb interactions at [arrow]"NN = 2.76 TeV and pp interactions at [arrow]"NN = 2.76 TeV with the ATLAS detector at the LHC are presented, using data with integrated luminosities of 0.15 nb-1 and 4.2 pb-1, respectively, in a wide transverse momentum (0.5
Measurement Of Higher Order Harmonic Azimuthal Anisotropy In Pbpb Collisions At Sqrt S Nn
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Author :
language : en
Publisher:
Release Date : 2014
Measurement Of Higher Order Harmonic Azimuthal Anisotropy 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 2014 with categories.
Measurements are presented by the CMS Collaboration at the Large Hadron Collider (LHC) of the higher-order harmonic coefficients that describe the azimuthal anisotropy of charged particles emitted in sqrt(s[NN]) = 2.76 TeV PbPb collisions. Expressed in terms of the Fourier components of the azimuthal distribution, the n = 3-6 harmonic coefficients are presented for charged particles as a function of their transverse momentum (0.3