Full jet evolution in quark–gluon plasma and nuclear modification of jet structure in Pb+Pb collisions at 2.76A TeV

2017 ◽  
Vol 289-290 ◽  
pp. 145-148
Author(s):  
Ning-Bo Chang ◽  
Guang-You Qin
Keyword(s):  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Nuclear Modification ◽  
Jet Structure

scholarly journals Jet quenching from heavy to light ion collisions

2021 ◽  
Vol 2021 (9) ◽  
Author(s):  
B. G. Zakharov
Keyword(s):  
Quark Gluon Plasma ◽  
Reasonable Agreement ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Jet Quenching ◽  
Light Nuclei ◽  
Nuclear Modification Factor ◽  
Nuclear Modification ◽  
Ion Collisions ◽  
Modification Factor

Abstract We perform an analysis of jet quenching in heavy and light ion collisions for scenarios without and with quark-gluon plasma formation in pp collisions. We find that the results for these scenarios are very similar, and both of them are in reasonable agreement with data for heavy ion collisions. However, their results become differ significantly for light nuclei. Using the parameters fitted to heavy ion data on the nuclear modification factor RAA, we make predictions for 0.2 and 7 TeV O+O collisions that can be verified by future experiments at RHIC and the LHC.

scholarly journals FERMI MOTION AND NUCLEAR MODIFICATION FACTOR

2004 ◽  
Vol 19 (22) ◽  
pp. 1669-1679 ◽  
Author(s):  
A. SZCZUREK ◽  
A. BUDZANOWSKI
Keyword(s):  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Fermi Motion ◽  
Nuclear Modification Factor ◽  
Nuclear Modification ◽  
Cronin Effect ◽  
Different Types ◽  
Low Energies ◽  
Modification Factor ◽  
The One

It has been argued recently that the so-called nuclear modification factor (RAA) is an observable useful for identifying the quark–gluon plasma. We discuss the effect of Fermi motion in nuclei on RAA at CERN SPS and BNL RHIC energies. Contrary to the simple intuition, rather large effects are found for CERN SPS. The Fermi motion in nuclei contributes significantly to the Cronin effect. The effect found is qualitatively similar to the one observed experimentally at CERN energies and similar to the one obtained in the models of multiple scattering of initial partons. We predict different size of the effect for different types of hadrons, especially at low energies.

scholarly journals Measurements of Λc+ in pp, p–Pb and Pb–Pb collisions with ALICE at the LHC

2020 ◽  
Vol 1643 (1) ◽  
pp. 012011
Author(s):  
C Hills
Keyword(s):  
Quark Gluon Plasma ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Lhcb Collaboration ◽  
Charm Quarks ◽  
Nuclear Modification Factor ◽  
Nuclear Modification ◽  
Ion Collisions ◽  
Model Predictions ◽  
Modification Factor

Abstract The baryon-to-meson ratio Λ c + / D 0 and the nuclear modification factor RAA in the charm sector are important observables to gain an understanding of how charm quarks hadronise and lose energy in the Quark-Gluon Plasma produced in heavy-ion collisions. In this contribution, recent measurements performed with the ALICE detector in pp, p–Pb and Pb–Pb collisions at 5.02 TeV are presented and compared with previous measurements in pp collisions at 7 TeV, measurements by the LHCb Collaboration and theoretical model predictions.

scholarly journals Nuclear modification factors for jet fragmentation

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
P. Caucal ◽  
E. Iancu ◽  
A. H. Mueller ◽  
G. Soyez
Keyword(s):  
Monte Carlo ◽  
Physical Interpretation ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Qualitative Behaviour ◽  
Nuclear Modification Factor ◽  
Nuclear Modification ◽  
Modification Factor ◽  
Nuclear Modification Factors ◽  
Jet Fragmentation

Abstract Using a recently-developed perturbative-QCD approach for jet evolution in a dense quark-gluon plasma, we study the nuclear modification factor for the jet fragmentation function. The qualitative behaviour that we find is in agreement with the respective experimental observations in Pb+Pb collisions at the LHC: a pronounced nuclear enhancement at both ends of the spectrum. Our Monte Carlo simulations are supplemented with analytic estimates which clarify the physical interpretation of the results. The main source of theoretical uncertainty is the sensitivity of our calculations to a low-momentum cutoff which mimics confinement. To reduce this sensitivity, we propose a new observable, which describes the jet fragmentation into subjets and is infrared-and-collinear safe by construction. We present Monte Carlo predictions for the associated nuclear modification factor together with their physical interpretation.

scholarly journals SUPPRESSION OF BOTTOMONIA STATES IN FINITE SIZE QUARK–GLUON PLASMA IN PbPb COLLISIONS AT LARGE HADRON COLLIDER

2013 ◽  
Vol 28 (21) ◽  
pp. 1350105 ◽  
Author(s):  
ABDULLA ABDULSALAM ◽  
PRASHANT SHUKLA
Keyword(s):  
Large Hadron Collider ◽  
Quark Gluon Plasma ◽  
Theoretical Calculations ◽  
Hadron Collider ◽  
Finite Size ◽  
Gluon Plasma ◽  
Binding Energies ◽  
Model Calculations ◽  
Nuclear Modification ◽  
Nuclear Modification Factors

The bottomonium states due to their varying binding energies dissolve at different temperatures and thus their nuclear modification factors and relative yields have potential to map the properties of Quark–Gluon Plasma (QGP). We estimate the suppression of bottomonia states due to color screening in an expanding QGP of finite lifetime and size with the conditions relevant for PbPb collisions at Large Hadron Collider. The properties of ϒ states and recent results on their dissociation temperatures have been used as ingredients in the study. The nuclear modification factors and the ratios of yields of ϒ states are then obtained as a function of transverse momentum and centrality. We compare our theoretical calculations with the bottomonia yields measured with CMS in PbPb collisions at [Formula: see text]. The model calculations explain the data very well.

scholarly journals SLAVNOV–TAYLOR IDENTITY FOR NONEQUILIBRIUM QUARK–GLUON PLASMA

2001 ◽  
Vol 16 (08) ◽  
pp. 531-540 ◽  
Author(s):  
K. OKANO
Keyword(s):  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Polarization Tensor ◽  
Gluon Polarization ◽  
Time Path

Within the closed-time-path formalism of nonequilibrium QCD, we derive a Slavnov–Taylor (ST) identity for the gluon polarization tensor. The ST identity takes the same form in both Coulomb and covariant gauges. Application to quasi-uniform quark–gluon plasma (QGP) near equilibrium or nonequilibrium quasistationary QGP is made.

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