scholarly journals Mixed higher-order anisotropic flow and nonlinear response coefficients of charged particles in $$\mathrm {PbPb}$$ collisions at $$\sqrt{\smash [b]{s_{_{\mathrm {NN}}}}} = 2.76$$ and 5.02$$\,\text {TeV}$$

2020 ◽  
Vol 80 (6) ◽  
Author(s):  
A. M. Sirunyan ◽  
◽  
A. Tumasyan ◽  
W. Adam ◽  
F. Ambrogi ◽  
...  
Keyword(s):  
Nonlinear Response ◽  
Charged Particles ◽  
Higher Order ◽  
Anisotropic Flow

scholarly journals CMS results on collectivity in PbPb collisions at √sNN = 2.76 and 5.02 TeV

2018 ◽  
Vol 182 ◽  
pp. 03010
Author(s):  
Jovan Milosevic
Keyword(s):  
Transverse Momentum ◽  
Nonlinear Response ◽  
Charged Particles ◽  
Theoretical Models ◽  
Higher Order ◽  
Initial State ◽  
Charm Quarks ◽  
High Extent ◽  
B Hadrons ◽  
Fine Splitting

Nonlinear response coeffcients of higher-order vn anisotropy harmonics for charged particles, as a function of transverse momentum (pT) and collision centrality, are measured in PbPb collisions at √sNN = 2.76 and 5.02 TeV. The nonlinear response coefficients are obtained using vn harmonics measured with respect to their own plane and the mixed harmonics. Using a fine splitting between v2{4} and v2{6} cumulants, the centrality dependence of the elliptic flow skewness is measured at 5.02 TeV PbPb collisions. The CMS also measured the v2 and v3 anisotropy harmonics of charged particles and prompt D0 mesons at |y| ≤ 1 as a function of pT and centrality in PbPb data at √sNN = 5.02 TeV collected with the CMS detector. Prompt D0 mesons, formed from the c quarks produced via initial hard scatterings, are separated up to a high extent from nonprompt D0 mesons emerged from decays of b hadrons. The results indicate that the charm quarks interact strongly with the QGP medium. Comparisons between theoretical models and data provide new constraints on the initial-state conditions and the interaction between charm quarks and the QGP medium.

scholarly journals Constraining the Chiral Magnetic Effect with charge-dependent azimuthal correlations in Pb-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}} $$ = 2.76 and 5.02 TeV

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
S. Acharya ◽  
◽  
D. Adamová ◽  
A. Adler ◽  
J. Adolfsson ◽  
...  
Keyword(s):  
Charged Particles ◽  
Magnetic Effect ◽  
Anisotropic Flow ◽  
Charge Conservation ◽  
Particle Correlations ◽  
Azimuthal Correlations ◽  
Chiral Magnetic Effect ◽  
Local Charge ◽  
Peripheral Collisions ◽  
Dependent Signal

Abstract Systematic studies of charge-dependent two- and three-particle correlations in Pb-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}} $$ s NN = 2.76 and 5.02 TeV used to probe the Chiral Magnetic Effect (CME) are presented. These measurements are performed for charged particles in the pseudorapidity (η) and transverse momentum (pT) ranges |η| < 0.8 and 0.2 < pT< 5 GeV/c. A significant charge-dependent signal that becomes more pronounced for peripheral collisions is reported for the CME-sensitive correlators γ1, 1 = 〈cos(φα + φβ − 2Ψ2)〉 and γ1, − 3 = 〈cos(φα − 3φβ + 2Ψ2)〉. The results are used to estimate the contribution of background effects, associated with local charge conservation coupled to anisotropic flow modulations, to measurements of the CME. A blast-wave parametrisation that incorporates local charge conservation tuned to reproduce the centrality dependent background effects is not able to fully describe the measured γ1,1. Finally, the charge and centrality dependence of mixed-harmonics three-particle correlations, of the form γ1, 2 = 〈cos(φα + 2φβ − 3Ψ3)〉, which are insensitive to the CME signal, verify again that background contributions dominate the measurement of γ1,1.

A test of higher order electroweak theory in Z0 decays to two leptons with an associated pair of charged particles

1992 ◽  
Vol 287 (4) ◽  
pp. 389-400 ◽  
Author(s):  
P.D. Acton ◽  
G. Alexander ◽  
J. Allison ◽  
P.P. Allport ◽  
K.J. Anderson ◽  
...  
Keyword(s):  
Charged Particles ◽  
Higher Order ◽  
Electroweak Theory ◽  
Associated Pair

Lagrangian for a system of charged particles to higher-order terms

1979 ◽  
Vol 26 (1) ◽  
pp. 5-8 ◽  
Author(s):  
D. D. Dionysiou ◽  
D. A. Vaiopoulos
Keyword(s):  
Charged Particles ◽  
Higher Order ◽  
Higher Order Terms

scholarly journals Some consequences of theories with maximal acceleration in laser–plasma acceleration

2019 ◽  
Vol 34 (15) ◽  
pp. 1950118 ◽  
Author(s):  
Ricardo Gallego Torromé
Keyword(s):  
Laser Plasma ◽  
Upper Bound ◽  
Charged Particles ◽  
Higher Order ◽  
Classical Electrodynamic ◽  
Plasma Acceleration ◽  
Maximal Acceleration ◽  
Jet Theory ◽  
Laser Plasma Acceleration

In this paper, we consider classical electrodynamic theories with maximal acceleration and some of their phenomenological consequences for laser–plasma acceleration. It is shown that in a recently proposed higher-order jet theory of electrodynamics, the maximal effective acceleration reachable by a consistent bunch of point-charged particles being accelerated by the wakefield is damped for bunches containing large number of charged particles. We argue that such a prediction of the theory is falsifiable. In the case of Born–Infeld kinematics, laser–plasma acceleration phenomenology provides an upper bound for the Born–Infeld parameter b. Improvements in the beam qualities will imply stronger constraints on b.

scholarly journals Measurements of Anisotropic Flow in Xe–Xe Collisions at √sNN = 5.44 TeV Using the ALICE Detector

Proceedings ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 41
Author(s):  
Jonatan Adolfsson
Keyword(s):  
Transport Properties ◽  
Charged Particles ◽  
Initial State ◽  
Anisotropic Flow ◽  
Hydrodynamical Models ◽  
Central Collisions ◽  
Two Systems

These proceedings summarise the first measurements of anisotropic flow coefficients v n , 2 ≤ n ≤ 4 , for inclusive charged particles at mid-rapidity in Xe–Xe collisions at s NN = 5 . 44 TeV . The results are compared with those from Pb–Pb collisions at s NN = 5 . 02 TeV , in order to test the initial state (IS) models and transport properties. The resulting differences in v 2 and v 3 between the two systems are consistent with two different hydrodynamical models. Moreover, it is expected that the ratios between v n and their corresponding eccentricities for n = 2 , 3 scale with transverse density. This is observed for some IS models, except for some deviations in central collisions. These results assist in constraining the initial state as well as the hydrodynamical propagation of the system.

scholarly journals Higher Harmonic Anisotropic Flow Measurements of Charged Particles in Pb-Pb Collisions atsNN=2.76  TeV

2011 ◽  
Vol 107 (3) ◽  
Author(s):  
K. Aamodt ◽  
B. Abelev ◽  
A. Abrahantes Quintana ◽  
D. Adamová ◽  
A. M. Adare ◽  
...  
Keyword(s):  
Charged Particles ◽  
Flow Measurements ◽  
Anisotropic Flow ◽  
Higher Harmonic
Sign in / Sign up

Export Citation Format

Share Document