A5051155209- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Black Holes and Theoretical Physics
- Physics of Superconductivity and Magnetism
- Advanced Data Storage Technologies
- Matrix Theory and Algorithms
- Theoretical and Computational Physics
- Parallel Computing and Optimization Techniques
- Algorithms and Data Compression
- Electromagnetic Scattering and Analysis
- Mathematical Approximation and Integration
- Cold Atom Physics and Bose-Einstein Condensates
- Dark Matter and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Medical Imaging Techniques and Applications
- Quantum Mechanics and Non-Hermitian Physics
- Mathematical Dynamics and Fractals
- Superconducting Materials and Applications
- Scientific Research and Discoveries
- Random Matrices and Applications
- Numerical Methods and Algorithms
- Advanced NMR Techniques and Applications
- Quantum chaos and dynamical systems
- Rare-earth and actinide compounds
RIKEN Center for Computational Science
2020-2025
RIKEN Nishina Center
2024
Kyoto University
2022-2024
The Graduate University for Advanced Studies, SOKENDAI
2022-2024
Obayashi (Japan)
2024
High Energy Accelerator Research Organization
2022-2024
Osaka University
2022-2024
Nagoya University
2023-2024
Japan Atomic Energy Agency
2024
Advanced Science Research Center
2024
We present quark number susceptibilities and conserved charge fluctuations for (2+1)-flavor QCD using M\"obius Domain Wall fermions with a pion mass of \(135~\rm{MeV}\). Our results are compared hadron resonance gas models below the transition temperature \(\mathcal{O}(g^2)\) perturbation theory at high temperatures. Additionally, we compare our findings from staggered fermion discretizations. Furthermore, also leading order Kurtosis electric strangeness fluctuations.
We investigate spatial two-point correlation functions of mesonic operators in two-flavor lattice QCD at high temperatures. The simulated temperatures over the range $T \in [147, 330]$ MeV, where critical temperature is estimated around 165 MeV. To ensure a good control chiral symmetry we employ M\"obius domain-wall fermion action for two degenerate flavors quarks. With cut off $a^{-1}\sim 2.6$ GeV, residual mass reduced to 0.14 energy spectrum obtained from screening incremental values...
We present an updated study of the $N_f=3$ QCD phase transition using M\"{o}bius domain wall fermions. Simulations were performed on $N_t=12$ lattices with aspect ratios ranging from 2 to 4 for various quark masses, at a lattice spacing $a=0.1361(20)$ fm, corresponding temperature 121(2) MeV. To clarify nature transition, large-volume lattice, $48^3 \times 12\times 16$, was added analyze volume dependence disconnected chiral susceptibility. By examining condensate, susceptibility, and Binder...
The pseudoscalar meson light-cone distribution amplitudes (LCDAs) are essential non-perturbative inputs for a range of high-energy exclusive processes in quantum chromodynamics. In this proceedings, progress towards determination the low Mellin moments pion and kaon LCDAs by HOPE Collaboration is reported.
We propose a lattice action for two dimensional super Yang-Mills theory with twisted N=2 supersymmetry. The extended supersymmetry is fully and exactly realized on the lattice. method employed quite general its extension to N=4 in four dimensions briefly presented. has new type of ``fermionic'' links, where odd Grassmann variables, supercharges fermionic connections sit. Leibniz rule preserved lattice, although modified ``shifted'' form that takes into account link nature both derivatives...
Parton distribution functions (PDFs) and light-cone amplitudes (LCDAs) are central non-perturbative objects of interest in high-energy inelastic elastic scattering, respectively. As a result, an ab-initio determination these is highly desirable. In this paper we present theoretical details for the calculation PDFs LCDAs using heavy-quark operator product expansion method. This strategy was proposed previous [Phys. Rev. D 73, 014501 (2006)] computing higher moments lattice QCD. Its feature...
The pion light-cone distribution amplitude (LCDA) is a central nonperturbative object of interest for high-energy exclusive processes in quantum chromodynamics. In this article, the second Mellin moment LCDA determined as proof-of-concept calculation first numerical implementation heavy-quark operator product expansion method. resulting value moment, quenched QCD at mass ${m}_{\ensuremath{\pi}}=550\text{ }\text{ }\mathrm{MeV}$ factorization scale 2 GeV...
We present an update on the study of QCD phase transition with 3 flavors Möbius domain wall fermions at zero baryon density. performed simulations lattices size $36^3\times12\times16$ and $24^3\times12\times32$ a variety quark masses fixed lattice spacing $a=0.1361(20)$ fm, which correspond to temperature 121(2) MeV. By analyzing chiral condensate, susceptibilitities Binder cumulant together result obtained from our previous $24^3\times12\times16$ lattices, we identified crossover occurring...
We report an exploratory study of the current-current matrix elements that are relevant to extraction moments pion light-cone distribution amplitude, employing method introducing a valence relativistic heavy quark. The numerical investigation is carried out in quenched approximation with physical volume $L\approx 2.4$ fm at two values lattice spacing (0.05 and 0.075 fm). obtain clean signals for Euclidean hadronic tensor reasonable statistics, but observe artefacts non-negligible our...
Bridge++ is a general-purpose code set for numerical simulation of lattice QCD aiming at readable, extensible, and portable while keeping practically high performance. The previous version implemented in double precision with fixed data layout. To exploit the arithmetic capability new processor architecture, we extend so that optimized available as branch, i.e., an alternative to original code. This paper explains our strategy implementation displays application examples following...
We investigate the finite temperature QCD phase transition with three degenerate quark flavors using Mobius domain wall fermions. To explore order of on lower left corner Columbia plot and if possible, to locate critical endpoint we performed simulations at temperatures around 181 121 MeV lattice spacing $a=0.1361(20)$~fm corresponding temporal extent $N_{\tau}=8,12$ varying mass for two different volumes aspect ratios $N_{\sigma}/N_{\tau}$ ranging from 2 3. By analyzing volume dependence...
We study the spectra of heavy-light and heavy-heavy mesons containing charm quarks, including higher spin states. use two sets $N_f = 2 + 1$ gauge configurations, one set from QCDSF using SLiNC action, other configurations Budapest-Marseille-Wuppertal collaboration, HEX smeared clover action. To extract information about excited states, we choose a suitable basis operators to implement variational method.
We study the spectra of heavy-light and heavy-heavy mesons containing charm quarks, including higher spin states.We use two sets N f = 2 + 1 gauge configurations, one set from QCDSF using SLiNC action, other configurations Budapest-Marseille-Wuppertal collaboration, HEX smeared clover action.To extract information about excited states, we choose a suitable basis operators to implement variational method.
Based on simulations of 2+1 flavor lattice QCD with M\"obius domain wall fermions at high temperatures, we compute a series spatial correlation functions to study the screening masses in mesonic states. We compare these symmetry relations for various quark and sizes temperatures above critical point. Using examine $SU(2)_L \times SU(2)_R$ as well anomalously broken axial $U(1)_A$ symmetry. Additionally explore possible emergent chiral-spin $SU(2)_{CS}$.
Simulations for the thermodynamics of 2+1 flavor QCD are performed employing chiral fermions. The use Möbius domain-wall fermions with stout-link smearing is more effective on finer lattices where all relevant symmetries realized accurately. We report initial simulations near (pseudo) critical point using line constant physics an average $ud$ quark mass slightly heavier than physical at $a\lesssim 0.1$ fm.
We explore the feasibility of determining Mellin moments pion's light cone distribution amplitude using heavy quark operator product expansion (HOPE) method. As first step a proof principle study we pursue determination second moment. discuss our choice kinematics which allows us to successfully extract moment at low pion momentum. describe numerical simulation, and data analysis, leads preliminary in continuum limit quenched approximation as $\langleξ^2\rangle=0.19(7)$ $\bar{\text{MS}}$...
We investigate implementation of lattice Quantum Chromodynamics (QCD) code on the Intel Xeon Phi Knights Landing (KNL). The most time consuming part numerical simulations QCD is a solver linear equation for large sparse matrix that represents strong interaction among quarks. To establish widely applicable prescriptions, we examine rather general methods SIMD architecture KNL, such as using intrinsics and manual prefetching, to multiplication iterative algorithms. Based performance measured...
Bridge++ is a general-purpose code set for lattice QCD simulations aiming at readable, extensible, and portable while keeping practical high performance. The new version 2.0 employs machine-dependent optimization, enabling flexible data layout in float/double precision, it was fixed only with the double precision previous versions. We report performance on supercomputer Fugaku Arm A64FX-SVE architecture by Fujitsu.