scholarly journals Scaling quark gluon plasma by HBT interferometry with lepton pairs

2012 ◽  
Author(s):  
Payal Mohanty ◽  
Jane Alam
Keyword(s):  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Lepton Pairs ◽  
Hbt Interferometry

PION ELLIPTIC FLOW AND HBT INTERFEROMETRY IN A GRANULAR QUARK-GLUON PLASMA DROPLET MODEL

2007 ◽  
Vol 16 (07n08) ◽  
pp. 1832-1838
Author(s):  
WEI-NING ZHANG ◽  
YAN-YU REN ◽  
CHEUK-YIN WONG
Keyword(s):  
Transverse Momentum ◽  
Velocity Distribution ◽  
Quark Gluon Plasma ◽  
Elliptic Flow ◽  
Gluon Plasma ◽  
Droplet Model ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra ◽  
Hbt Interferometry

We use a model of quark-gluon plasma granular droplets that evolve hydrodynamically to investigate pion elliptic flow and Hanbury–Brown–Twiss interferometry. We find that the data of pion transverse momentum spectra, elliptic flows, and HBT radii in [Formula: see text] Au + Au collisions at RHIC can be described well by an expanding source of granular droplets with an anisotropic velocity distribution.

scholarly journals PROBING THE QUARK-GLUON PLASMA AT THE LHC WITH Z0-TAGGED JETS IN CMS

2007 ◽  
Vol 16 (07n08) ◽  
pp. 1950-1956 ◽  
Author(s):  
CAMELIA MIRONOV ◽  
MARIA CASTRO ◽  
PAUL CONSTANTIN ◽  
GERD J. KUNDE ◽  
RAMONA VOGT
Keyword(s):  
Quark Gluon Plasma ◽  
Hadron Collider ◽  
Gluon Plasma ◽  
Heavy Meson ◽  
Hard Scattering ◽  
Interacting Particles ◽  
Lepton Pairs ◽  
Electromagnetic Probe ◽  
Muon Pairs ◽  
Fragmentation Functions

An important tool in quark-gluon plasma studies at RHIC has been the measurement of dijets investigated via leading hadron correlations. With much higher rates for hard processes at the Large Hadron Collider, studies of Z0-tagged jets become possible. A clear experimental signature is provided by the measurement of muon pairs from the Z0 decays, for which CMS is an ideally suited detector. Instead of measuring back-to-back correlations of two strongly interacting particles, one side is replaced by an electromagnetic probe which propagates through the plasma undisturbed and provides a measurement of the energy of the initial hard scattering. We propose to use lepton-pair tagged jets to study medium-induced partonic energy loss and to measure in-medium parton fragmentation functions. The lepton pairs from semileptonic decays of heavy meson pairs ([Formula: see text] and [Formula: see text]) are a background source for the tagged dilepton-jet signal. We present the calculated signal rates (using PYTHIA) and background rates (using HVQMNR). We also discuss strategies for maximizing the signal-to-background ratio.

scholarly journals Thermal Photons and Lepton Pairs from Quark Gluon Plasma and Hot Hadronic Matter

2000 ◽  
Vol 286 (2) ◽  
pp. 159-248 ◽  
Author(s):  
Jan-e Alam ◽  
Sourav Sarkar ◽  
Pradip Roy ◽  
T. Hatsuda ◽  
Bikash Sinha
Keyword(s):  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Hadronic Matter ◽  
Lepton Pairs

Lepton pairs from a detonating quark-gluon plasma

1986 ◽  
Vol 168 (4) ◽  
pp. 405-408 ◽  
Author(s):  
J. Cleymans ◽  
J. Fingberg
Keyword(s):  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Lepton Pairs

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.

scholarly journals Quark Cluster Expansion Model for Interpreting Finite-T Lattice QCD Thermodynamics

Symmetry ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 514
Author(s):  
David Blaschke ◽  
Kirill A. Devyatyarov ◽  
Olaf Kaczmarek
Keyword(s):  
Lattice Qcd ◽  
Cluster Expansion ◽  
Quark Gluon Plasma ◽  
Degrees Of Freedom ◽  
Gluon Plasma ◽  
Polyakov Loop ◽  
Unified Approach ◽  
Narrow Temperature Interval ◽  
Levinson Theorem ◽  
Expansion Model

In this work, we present a unified approach to the thermodynamics of hadron–quark–gluon matter at finite temperatures on the basis of a quark cluster expansion in the form of a generalized Beth–Uhlenbeck approach with a generic ansatz for the hadronic phase shifts that fulfills the Levinson theorem. The change in the composition of the system from a hadron resonance gas to a quark–gluon plasma takes place in the narrow temperature interval of 150–190 MeV, where the Mott dissociation of hadrons is triggered by the dropping quark mass as a result of the restoration of chiral symmetry. The deconfinement of quark and gluon degrees of freedom is regulated by the Polyakov loop variable that signals the breaking of the Z(3) center symmetry of the color SU(3) group of QCD. We suggest a Polyakov-loop quark–gluon plasma model with O(αs) virial correction and solve the stationarity condition of the thermodynamic potential (gap equation) for the Polyakov loop. The resulting pressure is in excellent agreement with lattice QCD simulations up to high temperatures.

scholarly journals Medium induced QCD cascades: broadening and rescattering during branching

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
E. Blanco ◽  
K. Kutak ◽  
W. Płaczek ◽  
M. Rohrmoser ◽  
R. Straka
Keyword(s):  
Momentum Transfer ◽  
Quark Gluon Plasma ◽  
Evolution Equations ◽  
Gaussian Approximation ◽  
Gluon Plasma ◽  
Jet Quenching ◽  
Diffusive Approximation

Abstract We study evolution equations describing jet propagation through quark-gluon plasma (QGP). In particular we investigate the contribution of momentum transfer during branching and find that such a contribution is sizeable. Furthermore, we study various approximations, such as the Gaussian approximation and the diffusive approximation to the jet-broadening term. We notice that in order to reproduce the BDIM equation (without the momentum transfer in the branching) the diffusive approximation requires a very large value of the jet-quenching parameter $$ \hat{q} $$ q ̂ .

Sign in / Sign up

Export Citation Format

Share Document