Bulletin of the American Physical Society
APS April Meeting 2021
Volume 66, Number 5
Saturday–Tuesday, April 17–20, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session L13: Heavy Ion CollisionsLive
|
Hide Abstracts |
Sponsoring Units: DNP Chair: James Mulligan, LBNL |
Sunday, April 18, 2021 3:45PM - 3:57PM Live |
L13.00001: Angular Power Spectrum in Heavy Ion Collisions from Simulations Hannah Anderson, Shengquan Tuo The pixelization code HEALPix was created by the Jet Propulsion Laboratory to analyze the cosmic microwave background. As has been shown using public data from the ALICE experiment, its two-dimensional representation of a sphere containing pixels of equal area has a broader application to heavy ion collisions. The application of HEALPix includes the concept of the angular power spectrum which details the contribution of spherical harmonics to the distribution of particles over the detector. This angular power spectrum can be directly related to the density and distribution of particles, which in turn relates to the particle flow. Through the use of simulated heavy ion data, we explore different aspects of the angular power spectrum and how it relates to flow analysis. There are some important details not covered within this study, such as the influence of non-flow. Therefore, the influence of non-flow is discussed in relation to the flow analysis. The angular power spectrum and features within the odd modes are detailed along with their specific application in heavy ion collisions. Through this study, it has become clear that HEALPix is another viable tool to be used in heavy ion flow analysis. [Preview Abstract] |
Sunday, April 18, 2021 3:57PM - 4:09PM Live |
L13.00002: Two Particle Correlations of Neutral and Charged Kaons in Heavy-ion Collisions Anjaly Sasikumar Menon Measurements of two particle correlations are sensitive to several characteristics of the medium created in heavy ion collisions. Looking at the correlations of charged and neutral kaons might provide information about the potential formation of disoriented chiral condensates (DCCs). Previous ALICE measurements have indeed shown a strong anti-correlation between charged and neutral kaons, which is qualitatively consistent with the formation of DCCs. The initial goal of this analysis is to perform charged and neutral kaon identification with high purity using the ALICE detector. Once the neutral and charged kaons are cleanly identified, they can be used to construct the two-particle correlation function. We will show measurements of a more differential analysis of these correlations as function of $\Delta \varphi$ and $\Delta \eta$ from Pb-Pb collisions at $\sqrt{s_{\rm{NN}}} =$ 5.02 TeV. [Preview Abstract] |
Sunday, April 18, 2021 4:09PM - 4:21PM Live |
L13.00003: Current and coming activities of the RIKEN/BNL Research Center in NP David Morrison Since it was founded in 1997, the RIKEN/BNL Research Center (RBRC) has been at the forefront of many key areas of high-energy nuclear physics, from lattice QCD calculations to nuclear theory to experiment. Over more than two decades, the RBRC has hosted influential workshops, been an intellectual center to visiting researchers, established joint appointments with universities, and has produced many nuclear physics faculty worldwide. The RBRC is as active today as it has always been, with a major focus on RHIC and its heavy-ion and spin physics programs. This talk will describe highlights of current RBRC activities, with an emphasis on the efforts, theoretical, experimental, and computational, in support of the upcoming sPHENIX scientific program. Possible directions beyond sPHENIX will also be described. [Preview Abstract] |
Sunday, April 18, 2021 4:21PM - 4:33PM Live |
L13.00004: Developments in Rivet analyses and application as educational tool Antonio Carlos Oliveira da Silva, Christine Nattrass Rivet (Robust Independent Validation of Experiment and Theory) is a framework that facilitates the comparison between measurements from high-energy physics experiments and simulations. It is also an important repository for analyses and works as a documentation of the techniques and methods implemented by particle and nuclear physics collaborations. In this contribution the recent developments for analyses in heavy-ion collisions, including features such as centrality determination and jet background subtraction, will be presented. The application of Rivet as education tool in research classes between 2019 and 2020 showed to be positive among undergraduate. Results from the 2020 Rivetizing Heavy Ion Collisions at RHIC workshop will also be presented. [Preview Abstract] |
Sunday, April 18, 2021 4:33PM - 4:45PM Live |
L13.00005: Comparison of Monte Carlo Charged Particle Spectra to Measured RHIC Data using RIVET William Witt, Charles Hughes, Christine Nattrass, Antonio Silva RIVET (Robust Independent Validation of Experiment and Theory) is a coding framework for comparing MC (Monte Carlo) simulations to published data, in order to validate the models used in those MC event generators. New additions to the code have enabled better implementation of heavy ion physics analyses. At the recent workshop, Rivetizing Heavy Ion Collisions at RHIC, participants wrote new analyses based on previously published heavy ion physics papers, including comparisons to particle spectra and bulk observables. These RIVET analyses are important for testing different models' ability to reproduce physical observables. This talk will present results from these new RIVET analyses on simulated data from different MC event generators, as well as comparisons to published data. [Preview Abstract] |
Sunday, April 18, 2021 4:45PM - 4:57PM Live |
L13.00006: Simulating real-time dynamics of hard probes in nuclear matter on a quantum computer Felix Ringer, James Mulligan, Mateusz Ploskon, Xiaojun Yao, Wibe A. de Jong, Mekena Metcalf We present a framework to simulate the dynamics of hard probes such as heavy quarks or jets in a hot, strongly-coupled quark-gluon plasma (QGP) on a quantum computer [1]. Hard probes in the QGP can be treated as open quantum systems governed in the Markovian limit by the Lindblad equation. However, due to large computational costs, most current phenomenological calculations of hard probes evolving in the QGP use semiclassical approximations of the quantum evolution. Quantum computation can mitigate these costs, and offers the potential for a fully quantum treatment with exponential speedup over classical techniques. We report a simplified demonstration of our framework on IBM Q quantum devices, and apply recently developed error mitigation techniques. Our work demonstrates the feasibility of simulating open quantum systems on current and near-term quantum devices, which is of broad relevance to applications in both hot and cold nuclear matter. [1] https://arxiv.org/abs/2010.03571 [Preview Abstract] |
Sunday, April 18, 2021 4:57PM - 5:09PM Live |
L13.00007: Measurement of proton-Xi correlation function in Au+Au Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV by STAR experiment at RHIC Ke Mi The study of baryon-baryon interactions are important to understand existence of strangelets in heavy-ion collisions and various exotic hadrons, modeling of astronomical objects such as neutron stars. A detailed knowledge of nucleon-nucleon (NN) potentials exists in literature, however very little is known about interactions between anti-nucleons. Similarly lack of scattering data for hyperon-nucleon (YN) systems makes it difficult to construct YN potentials. In heavy-ion collisions, a large number of baryons are produced in each nucleus-nucleus collision, which allows us to study the NN and YN interactions. Measurements of two-particle correlation function are used to study the space-time dynamics of the source created in heavy-ion collisions. At low relative momentum, the two-particle correlations are effected by the Final State Interactions (FSI), making it possible to measure FSI between nucleon and multi-strange baryon Xi. The first measurement of proton-Xi correlation function from the STAR experiment at RHIC for the Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV will be presented. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700