Conveners
Quark Matter and High Energy Heavy Ion Collisions: Parallel 5 — Small Systems and the Limits of the Quark Gluon Plasma
- Marta Verweij (Vanderbilt University)
- Jacquelyn Noronha-Hostler (Rutgers University)
Quark Matter and High Energy Heavy Ion Collisions: Parallel 6 — Heavy Ions at the LHC
- Marta Verweij (Vanderbilt University)
- Jacquelyn Noronha-Hostler (Rutgers University)
Quark Matter and High Energy Heavy Ion Collisions: Parallel 8 — Jet Substructure and Quenching / Flavor
- Marta Verweij (Vanderbilt University)
- Jacquelyn Noronha-Hostler (Rutgers University)
Quark Matter and High Energy Heavy Ion Collisions: Parallel 9 — QCD Phase Transition | New Instrumentation
- Marta Verweij (Vanderbilt University)
- Jacquelyn Noronha-Hostler (Rutgers University)
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Prof. Jacquelyn Noronha-Hostler (Rutgers University)31/05/2018, 14:00QMHIParallelA long standing question in the field of heavy-ion collisions is whether charm quarks are thermalized within the Quark Gluon Plasma. In recent years, progress in lattice QCD simulations has led to reliable results for the equation of state of a system of 2+1 flavors (up, down, and strange) and 2+1+1 flavors (up, down, strange, and charm). We find that the equation of state strongly affects...Go to contribution page
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Zhenyu Chen (Rice University)31/05/2018, 14:20QMHIParallelIn recent years, a wealth of experimental evidence has suggested the presence of novel collectivity in small collision systems such as $p$–$p$ and $p$–Pb with high-multiplicity final states. The origin of the observed collectivity is under intense debate, i.e., whether a strongly coupled quark-gluon medium is formed, similar to that in large heavy ion collisions. Latest results at CMS in small...Go to contribution page
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Sylvia Morrow (Vanderbilt University)31/05/2018, 14:40QMHIParallelTo answer the question of how small a system can be while still exhibiting collective behavior, the PHENIX experiment has used RHIC's extraordinary versatility to design a set of experiments controlling the initial geometry of the collisions by selecting different colliding species, $p/d/^3$He+Au. In addition, a beam energy scan with $d$+Au collisions was done to vary the lifetime of the...Go to contribution page
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Giuliano Giacalone (IPhT Saclay)31/05/2018, 15:00QMHIParallelA well-established hydrodynamic framework has been developed over the last couple of decades to describe the dynamics of the fluidlike system (potentially, a quark-gluon plasma) created in relativistic heavy-ion collisions. This framework predicts in particular the nontrivial patterns of long-range azimuthal correlations which are observed in the final states of nucleus-nucleus collisions, and...Go to contribution page
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Ryan Weller (MIT)31/05/2018, 15:20QMHIParallelIn recent years, suggestive signatures of collective flow-like behavior have been observed in $p$+$p$ collisions at the LHC and also in light+heavy-ion collisions. We review hydrodynamic model calculations that reasonably describe the experimentally measured $dN_\mathrm{ch}/d\eta$ and $v_2,v_3,v_4$ at $\eta=0$ in collisions from Pb+Pb down to $p$+$p$. Nevertheless, it is still uncertain...Go to contribution page
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Brian Cole (Columbia University)31/05/2018, 16:10QMHIParallelThe heavy-ion program in the ATLAS experiment at the LHC originated as an extensive program to probe and characterize the hot, dense matter created in relativistic lead-lead collisions. In recent years, the program has also broadened to a detailed study of collective behaviour in smaller systems. In particular, the techniques used to study larger systems are also applied to proton-proton and...Go to contribution page
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Prof. Manuel Calderon de la Barca Sanchez (UC Davis)31/05/2018, 16:40QMHIParallelWe present a summary of recent heavy ion results with CMS, including several topics of interest to the study of quark matter. Our interest involves characterizing the properties of the quark-gluon plasma, such as its temperature and transport coefficients, and the dynamical properties leading to collective behavior. We have explored the onset of collectivity in small systems via azimuthal...Go to contribution page
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Wladyslaw Henryk Trzaska (University of Jyvaskyla)31/05/2018, 17:10QMHIParallelThe upcoming upgrade of the CERN LHC is a challenge and opportunity for ALICE (A Large Ion Collider Experiment). By sustaining a Pb–Pb readout rate of 50 kHz, ALICE will gain two orders of magnitude in statistics and conduct high-precision measurements of rare probes at low $p_\mathrm{T}$ values. ALICE is refitting the Time Projection Chamber with new, GEM-based readout chambers with...Go to contribution page
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Mr Davide Caffarri (NIKHEF - Amsterdam)31/05/2018, 17:30QMHIParallelThe heavy-ion physics program at the LHC aims at characterizing the high energy density, high temperature, deconfined partonic state of matter called Quark-Gluon Plasma. Hard probes are very useful tools to study the QGP properties since they are abundantly produced at the LHC energy regime, via hard scattering processes, and they experience the full evolution of the system, losing energy...Go to contribution page
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Ms Barbara Trzeciak (Utrecht Univeristy)31/05/2018, 17:50QMHIParallelThe ALICE experiment is dedicated to investigate properties of the Quark-Gluon Plasma (QGP) created in high-energy Pb–Pb collisions at the LHC. Heavy quarks (charm and beauty) are a unique tool to study and characterise the QGP properties. They are produced in the early stage of the heavy-ion collisions and traverse the hot and dense medium losing energy due to collisional and radiative...Go to contribution page
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Dr LongGang Pang (UC Berkeley and LBNL)31/05/2018, 18:10QMHIParallelThe state-of-the-art pattern recognition method in machine learning (deep convolution neural network) has been used to classify two different phase transitions between normal nuclear matter and hot-dense quark gluon plasma. Large amounts of training data have been prepared by simulating heavy ion collisions with event-by-event relativistic hydrodynamics. High level correlations of particle...Go to contribution page
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Dr Christine Nattrass (University of Tennessee, Knoxville)01/06/2018, 16:10QMHIParallelThe Quark-Gluon Plasma (QGP) is created in high energy heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). This medium is transparent to electromagnetic probes but nearly opaque to colored probes. Hard partons produced early in the collision fragment and hadronize into a collimated spray of particles called a jet. The partons lose energy...Go to contribution page
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Dr Abhijit Majumder (Wayne State University)01/06/2018, 16:40QMHIParallelThe quenching of hard jets in relativistic heavy-ion collisions has become the leading probe of the properties of the Quark-Gluon-Plasma (QGP) formed in these collisions. Formed in rare hard interactions, jets traverse the entire space-time profile of the exploding plasma and are modified by it. The detailed study of these modifications reveals clues about the internal structure of the QGP. In...Go to contribution page
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Prof. Saskia Mioduszewski (Texas A&M University)01/06/2018, 17:10QMHIParallelRHIC at Brookhaven National Laboratory has been providing high energy heavy-ion collisions since the year 2000. Hard probes are often analyzed to study the properties of the matter created in heavy-ion collisions, by comparing the measurements to those in $p+p$ collisions. Direct photons, those produced during the collision rather than from decays of hadrons, are particularly interesting...Go to contribution page
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Kyle Lee (Stony Brook University)01/06/2018, 17:30QMHIParallelIn this talk, I will develop the theoretical framework of jet substructure measurements in the semi-inclusive jet production. The talk will mainly be focused on the recent work on jet mass measurements, with and without grooming, as a particular substructure of interest. I will discuss factorization, nonperturbative effects, and joint resummations of several classes of logarithmic corrections...Go to contribution page
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Shanshan Cao (Wayne State University)01/06/2018, 17:50QMHIParallelHeavy quarks serve as valuable probes of the QGP properties as well as the mass hierarchy of parton energy loss. In this talk, different model calculations of heavy quark energy loss inside the QGP are compared to each other within the same framework, from which we narrow down the systematical uncertainty of the extracted heavy quark transport coefficients from model to data comparison. In...Go to contribution page
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Dr Xuan Li (Los Alamos National Lab)01/06/2018, 18:10QMHIParallelHeavy flavor and quarkonium production are important hard probes to test Quantum Chromodynamics (QCD) and measure the properties of the Quark Gluon Plasma (QGP) created in high energy heavy ion collisions. Unlike LHC experiments, heavy flavor production at RHIC has its unique kinematic region and different production mechanisms. The PHENIX experiment has collected large data sets of 200/510...Go to contribution page
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Mikhail Stephanov (University of Illinois at Chicago)02/06/2018, 16:10QMHIParallelThe crucial properties of the QCD vacuum — confinement and chiral symmetry breaking — undergo qualitative changes at sufficiently high temperatures and/or baryon densities. Determining where on the phase diagram and how the transitions between QCD phases are accomplished is the major goal of heavy-ion collision experiments, as well as of theoretical efforts including first-principle lattice...Go to contribution page
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Dr Alexei Bazavov (Michigan State University)02/06/2018, 16:40QMHIParallelThe physics of the transition from the hadronic to quark-gluon plasma phase is non-perturbative and lattice QCD provides a framework for $\textit{ab initio}$ calculations in this regime of QCD. It is expected that the QCD phase diagram in the temperature-baryon chemical potential plane contains a line of first-order phase transitions that ends at a critical point. $\textit{Ab initio}$...Go to contribution page
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Roli Esha (UCLA)02/06/2018, 17:10QMHIParallelFluctuations and correlations of conserved quantities (baryon number, strangeness, and charge) can be used to probe phases of strongly interacting QCD matter and the possible existence of a critical point in the phase diagram. The cumulants of the multiplicity distributions related to these conserved quantities are expected to be sensitive to possible increased fluctuations near a critical...Go to contribution page
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Prof. Che-Ming Ko (Texas A&M University)02/06/2018, 17:30QMHIParallelSince the pioneering study by Matsui and Satz on $J/\psi$ suppression by quark-gluon plasma formation in relativistic heavy ion collisions, there have been a large number of theoretical and experimental studies on this topic. These studies have significantly enhanced our understanding of the properties of $J/psi$, its excited states, and other quarkonium states consisting of bottom quarks at...Go to contribution page
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Dr Ron Soltz (Lawrence Livermore National Laboratory)02/06/2018, 17:50QMHIParallelsPHENIX is a large-acceptance, high-rate jet and $\Upsilon$ detector designed to study the structure of the quark-gluon plasma in heavy ion collisions at RHIC. It consists of full calorimeter over the full azimuth for $|\eta|<1.1$ with tracking and precision vertexing. These components will provide full jet reconstruction, heavy-flavor jet tagging, and $\Upsilon$ spectroscopy. We will...Go to contribution page
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David Tlusty (Rice University)02/06/2018, 18:10QMHIParallelThe exploration of the QCD phase diagram has been one of the main drivers of contemporary nuclear physics. The Relativistic Heavy Ion Collider (RHIC) at BNL is uniquely suited for this task through its Beam Energy Scan (BES) program which allowed for a large range in baryon chemical potential $\mu_B$ as was successfully demonstrated after the completion of Phase 1 in 2014. Phase 2 of the BES...Go to contribution page