A5105755098- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Nuclear reactor physics and engineering
- Nuclear physics research studies
- Dark Matter and Cosmic Phenomena
- Superconducting Materials and Applications
- Advanced Data Storage Technologies
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Statistical Methods and Bayesian Inference
- X-ray Spectroscopy and Fluorescence Analysis
- Pulsars and Gravitational Waves Research
- Stochastic processes and statistical mechanics
- Ion-surface interactions and analysis
- Manufacturing Process and Optimization
- Pediatric Urology and Nephrology Studies
- Atomic and Molecular Physics
- Particle Accelerators and Free-Electron Lasers
- Neutrino Physics Research
- Stochastic processes and financial applications
- Data Quality and Management
- Advanced Semiconductor Detectors and Materials
- advanced mathematical theories
Lawrence Berkeley National Laboratory
2016-2025
University of Bergen
2024
Universidad Nacional Autónoma de México
2017-2024
A. Alikhanyan National Laboratory
2015-2024
Thomas Jefferson National Accelerator Facility
2024
University of California, Riverside
2024
Central China Normal University
2019
Panjab University
2009
Goethe University Frankfurt
2006-2008
Jagiellonian University
2003-2006
We present simulations of non-equilibrium dynamics quantum field theories on digital computers. As a representative example, we consider the Schwinger model, 1+1 dimensional U(1) gauge theory, coupled through Yukawa-type interaction to thermal environment described by scalar theory. use Hamiltonian formulation model discretized spatial lattice. With fields traced out, can be treated as an open system and its real-time are governed Lindblad equation in Markovian limit. The with ultimately...
Abstract High-energy nuclear collisions encompass three key stages: the structure of colliding nuclei, informed by low-energy physics, initial condition , leading to formation quark–gluon plasma (QGP), and hydrodynamic expansion hadronization QGP, final-state hadron distributions that are observed experimentally. Recent advances in both experimental theoretical methods have ushered a precision era heavy-ion collisions, enabling an increasingly accurate understanding these stages. However,...
The invariant-mass spectrum of $e^+ e^-$ pairs produced in $^{12}$C+$^{12}$C collisions at an incident energy 2 GeV per nucleon has been measured for the first time. pair production probabilities span over five orders magnitude from $\pi^0$-Dalitz to $\rho/\omega$ region. Dalitz decays $\pi^0$ and $\eta$ account all yield up 0.15 GeV/c$^2$, but only about 50% above this mass. A comparison with model calculations shows that excess is likely due baryon-resonance vector-meson decays. Transport...
The past decade has seen huge advances in experimental measurements made heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) and more recently Large Hadron (LHC). These new data, combination with theoretical from calculations a variety of frameworks, have led to broad deep knowledge properties thermal QCD matter. Increasingly quantitative descriptions quark-gluon plasma (QGP) created these established that QGP is strongly coupled liquid lowest value specific viscosity ever...
We present a framework to simulate the dynamics of hard probes such as heavy quarks or jets in hot, strongly coupled quark-gluon plasma (QGP) on quantum computer. Hard QGP can be treated open systems governed Markovian limit by Lindblad equation. However, due large computational costs, most current phenomenological calculations evolving use semiclassical approximations evolution. Quantum computation mitigate these costs and offers potential for fully treatment with exponential speed-up over...
A bstract We explore machine learning-based jet and event identification at the future Electron-Ion Collider (EIC). study effectiveness of classifiers relatively low EIC energies, focusing on (i) identifying flavor (ii) underlying hard process event. propose applications our in key research areas current Relativistic Heavy Ion program, including enhancing constraints (transverse momentum dependent) parton distribution functions, improving experimental access to transverse spin asymmetries,...
This paper summarizes the yields and emission patterns of ${K}^{+}$ ${K}^{\ensuremath{-}}$ mesons measured in inclusive C+C, Ni+Ni, Au+Au collisions at incident energies from $0.6A$ to $2.0A$ GeV using Kaon Spectrometer KaoS GSI. For Ni+Ni $1.5A$ $1.93A$ as well for GeV, detailed results are presented multiplicities, inverse slope parameters, anisotropies angular a function collision centrality. When comparing transport-model calculations production yields, an agreement is only obtained soft...
An exclusive measurement of the Coulomb breakup 8B into 7Be+p at 254A MeV allowed study angular correlations particles. These demonstrate clearly that E1 multipolarity dominates and E2 can be neglected. By using a simple single-particle model for treating in first-order perturbation theory, we extract zero-energy S factor S17(0)=18.6±1.2±1.0 eV b, where first error is experimental second one reflects theoretical uncertainty extrapolation.Received 4 March...
The Future Circular Collider (FCC) Study is aimed at assessing the physics potential and technical feasibility of a new collider with centre-of-mass energies, in hadron-hadron collision mode, seven times larger than nominal LHC energies. Operating such machine heavy ions an option that being considered accelerator design studies. It would provide, for example, Pb-Pb p-Pb collisions sqrt{s_NN} = 39 63 TeV, respectively, per nucleon-nucleon collision, integrated luminosities above 30 nb^-1...
A bstract Machine learning-based jet classifiers are able to achieve impressive tagging performance in a variety of applications high-energy and nuclear physics. However, it remains unclear many cases which aspects jets give rise this discriminating power, whether observables that tractable perturbative QCD such as those obeying infrared-collinear (IRC) safety serve sufficient inputs. In article, we introduce new classifier, Jet Flow Networks (JFNs), an effort address the question IRC unsafe...
Using a novel observable that relies on the momentum difference of two most energetic subjets within jet $$\varDelta S_{12}$$ we study internal structure high-energy jets simulated by several Monte Carlo event generators implement partonic energy-loss in dense medium. Based inclusive and dijet production demonstrate is an effective tool to discriminate between different models modifications over broad kinematic range. The new quantity, while preserving collinear infrared safety modern...
The `dead cone' effect is a predicted suppression of radiation from charged particle at small angles, but it difficult to measure in practice. In this Editors' Suggestion the authors demonstrate iterative declustering techniques which help reveal dead cone Monte Carlo simulations.
Measurements of jet substructure in heavy-ion collisions may provide key insight into the nature quenching quark-gluon plasma. Jet grooming techniques from high-energy physics have been applied to order isolate theoretically controlled observables and explore possible modification hard jets. However, algorithms used not tailored unique considerations collisions, particular experimental challenge reconstructing jets presence a large underlying event. We report set simple studies illustrating...
A bstract Jets produced in high-energy heavy-ion collisions are modified compared to those proton-proton due their interaction with the deconfined, strongly-coupled quark-gluon plasma (QGP). In this work, we employ machine learning techniques identify important features that distinguish jets from collisions. We formulate problem using binary classification and focus on leveraging ways inform theoretical calculations of jet modification: (i) quantify information content terms Infrared...
An exclusive measurement of the Coulomb breakup B8 into Be7+p at 254A MeV was used to infer low-energy Be7(p,γ)B8 cross section. The radioactive beam produced by projectile fragmentation 350A C12 and separated with FRagment Separator (FRS) Gesellschaft für Schwerionenforschung in Darmstadt, Germany. Coulomb-breakup products were momentum-analyzed KaoS magnetic spectrometer; particular emphasis placed on angular correlations particles. These demonstrate clearly that E1 multipolarity dominates...
The on-line event reconstruction in ALICE is performed by the High Level Trigger, which should process up to 2000 events per second proton-proton collisions and 300 central heavy-ion collisions, corresponding an input data stream of 30 GB/s. In order fulfill time requirements, a fast tracker has been developed. algorithm combines Cellular Automaton method being used for pattern recognition Kalman Filter fitting found trajectories final track selection. was adapted run on Graphics Processing...
We present an implementation of explainable and physics-aware machine learning model capable inferring the underlying physics high-energy particle collisions using information encoded in energy-momentum four-vectors final state particles. demonstrate proof-of-concept our White Box AI approach a Generative Adversarial Network (GAN) which learns from DGLAP-based parton shower Monte Carlo event generator. show, for first time, that leads to network is able learn not only distribution particles,...
In preparation for the 2023 NSAC Long Range Plan (LRP), members of Nuclear Science community gathered to discuss current state of, and plans further leveraging opportunities in, QIST in NP research at Quantum Information U.S. Physics Planning workshop, held Santa Fe, New Mexico on January 31 - February 1, 2023. The workshop included 45 in-person participants 53 remote attendees. outcome identified strategic requirements next 5-10 years advance quantum sensing simulations within NP, develop a...
A major goal of the hot QCD program, extraction properties quark gluon plasma (QGP), is currently limited by our poor knowledge initial condition QGP, in particular how it shaped from colliding nuclei. To attack this limitation, we propose to exploit collisions selected species precisely assess changes under variations structure ions. This knowledge, combined with event-by-event measures particle correlations final state heavy-ion collisions, will provide turn a new way probe collective...
For the ALICE experiment at Large Hadron Collider (LHC) CERN/Geneva, a high level trigger system (HLT) for online event selection and data compression has been developed computing cluster of several hundred dual-processor nodes is being installed. A major integration test was carried out during commissioning time projection chamber (TPC), where HLT also provides monitoring system. All parts like small cluster, hardware input devices, transportation framework, analysis could be tested...