A5003814818- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Physics of Superconductivity and Magnetism
- Black Holes and Theoretical Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Theoretical and Computational Physics
- Scientific Research and Discoveries
- Cosmology and Gravitation Theories
- Rare-earth and actinide compounds
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Scientific Computing and Data Management
- Mathematical Approximation and Integration
- AI-based Problem Solving and Planning
- Chemical Thermodynamics and Molecular Structure
- Pulsars and Gravitational Waves Research
- Quantum chaos and dynamical systems
- Planetary Science and Exploration
- Spectral Theory in Mathematical Physics
- Light effects on plants
- Big Data Technologies and Applications
- Polymer Science and Applications
National Yang Ming Chiao Tung University
2022-2024
University of Southern Denmark
2022-2023
European Organization for Nuclear Research
2018-2023
University of Bern
2022-2023
Goethe University Frankfurt
2011-2023
Bielefeld University
2008-2023
University of Bonn
2023
Université de Toulon
2022-2023
Centre National de la Recherche Scientifique
2022-2023
Michigan State University
2022-2023
We describe a new set of gauge configurations generated within the CLS effort. These ensembles have N f = 2 + 1 flavors non-perturbatively improved Wilson fermions in sea with Lüscher-Weisz action used for gluons. Open boundary conditions time are to address problem topological freezing at small lattice spacings and twisted-mass reweighting stability simulations. give bare parameters which been how these chosen. Details algorithmic setup its performance presented as well measurements pion...
We calculate the vector current correlation function for light valence quarks in deconfined phase of QCD. The calculations have been performed quenched lattice QCD at T=1.45 Tc four values cut-off on lattices up to size 128^3x48. This allows perform a continuum extrapolation Euclidean time interval tau*T -in [0.2, 0.5], which extends largest temporal separations possible finite temperature, better than 1% accuracy. In this interval, value temperature investigated, we find that never deviates...
We investigate the possibility of qq^{'}b[over ¯]b[over ¯] tetraquark bound states using n_{f}=2+1 lattice QCD ensembles with pion masses ≃164, 299, and 415 MeV. Motivated by observations from heavy baryon phenomenology, we consider two interpolating operators, both which are expected to couple efficiently states: one a diquark-antidiquark meson-meson structure. Using nonrelativistic simulate bottom quarks, study udb[over ¯], ℓsb[over channels ℓ=u, d, find unambiguous signals for...
We study the properties of charmonium states at finite temperature in quenched QCD on large and fine isotropic lattices. perform a detailed analysis correlation spectral functions both below above ${T}_{c}$. Our suggests that $S$ wave ($J/\ensuremath{\psi}$ ${\ensuremath{\eta}}_{c}$) $P$ (${\ensuremath{\chi}}_{c0}$ ${\ensuremath{\chi}}_{c1}$) disappear already about $1.5{T}_{c}$. The charm diffusion coefficient is estimated through Kubo formula found to be compatible with zero ${T}_{c}$...
We estimate the momentum diffusion coefficient of a heavy quark within pure SU(3) plasma at temperature about $1.5{T}_{\mathrm{c}}$. Large-scale Monte Carlo simulations on series lattices extending up to ${192}^{3}\ifmmode\times\else\texttimes\fi{}48$ permit us carry out continuum extrapolation so-called color-electric imaginary-time correlator. The extrapolated correlator is analyzed with help theoretically motivated models for corresponding spectral function. Evidence nonzero transport...
We continue our study of heavy-light four-quark states and find evidence from lattice QCD for the existence a strong-interaction-stable $I({J}^{P})=0({1}^{+})$ $ud\overline{c}\overline{b}$ tetraquark with mass in range 15 to 61 MeV below $\overline{D}{B}^{*}$ threshold. Since this includes electromagnetic $\overline{D}B\ensuremath{\gamma}$ decay threshold, current uncertainties do not allow us determine whether such state would electromagnetically or only weakly. also perform at fixed pion...
We perform an $n_f=2+1$ lattice study of a number channels where past claims exist in the literature for existence strong-interaction-stable light-heavy tetraquarks. find no evidence any such deeply-bound states, beyond $J^P=1^+$, $I=0$ $ud\bar{b}\bar{b}$ and $I=1/2$ $ls\bar{b}\bar{b}$ states already identified earlier studies. also describe systematic improvements to our previous studies, including working with larger $m_\pi L$ better suppress possible finite volume effects, employing...
We propose and assess an alternative quantum generator architecture in the context of generative adversarial learning for Monte Carlo event generation, used to simulate particle physics processes at Large Hadron Collider (LHC). validate this methodology by implementing network on artificial data generated from known underlying distributions. The is then applied Carlo-generated datasets specific LHC scattering processes. new leads a generalization state-of-the-art implementations, achieving...
We address several aspects of lattice QCD calculations the hadronic vacuum polarization and associated Adler function. implement a representation derived previously which allows one to access these phenomenologically important functions for continuous set virtualities, irrespective flavor structure current. Secondly, we present theoretical analysis finite-size effects on our particular function, based operator product expansion at large momenta spectral Euclidean correlator small momenta....
We study the thermal transition of QCD with two degenerate light flavours by lattice simulations using O(a)-improved Wilson quarks. Temperature scans are performed at a fixed value N t = (aT)−1 16, where is spacing and T temperature, three zero-temperature pion masses between 200 MeV 540 MeV. In this range we find that consistent broad crossover. As probe restoration chiral symmetry, static screening spectrum. observe degeneracy transverse isovector vector axial-vector channels starting from...
We compute and analyze correlation functions in the isovector vector channel at vanishing spatial momentum across deconfinement phase transition lattice QCD. The simulations are carried out temperatures $T/{T}_{c}=0.156$, 0.8, 1.0, 1.25 1.67 with ${T}_{c}\ensuremath{\simeq}203\text{ }\text{ }\mathrm{MeV}$ for two flavors of Wilson-Clover fermions a zero-temperature pion mass $\ensuremath{\simeq}270\text{ }\mathrm{MeV}$. Exploiting exact sum rules applying phenomenologically motivated Ansatz...
We present a calculation of the hadronic vacuum polarization contribution to muon anomalous magnetic moment, hvp , in lattice QCD employing dynamical up and down quarks. focus on controlling infrared regime function. To this end we employ several complementary approaches, including Padé fits, time moments time-momentum representation. correct our results for finite-volume effects by combining Gounaris-Sakurai parameterization timelike pion form factor with Lüscher formalism. On subset...
We explore a method developed in statistical physics which has been argued to have exponentially small finite-volume effects, order determine the critical temperature Tc of pure SU(3) gauge theory close continuum limit. The allows us estimate coupling betac Wilson action for temporal extents up Nt ~ 20 with < 0.1% uncertainties. Making use scale setting parameters r0 and sqrt{t0} same range beta-values, these results lead independent extrapolations = 0.7457(45) 0.2489(14), latter originating...
We present a lattice QCD spectroscopy study in the isospin singlet, strangeness $\ensuremath{-}2$ sectors relevant for conjectured $H$ dibaryon. employ both local and bilocal interpolating operators to isolate ground state rest frame moving frames. Calculations are performed using two flavors of $O(a)$-improved Wilson fermions quenched strange quark. Our initial point-source method constructing correlators does not allow at source; nevertheless, results from these sink indicate that they...
We investigate the properties of pion quasiparticle in low-temperature phase two-flavor QCD on lattice with support from chiral effective theory. find that mass is significantly reduced compared to its value vacuum, contrast static screening mass, which increases temperature. By a simple argument, near limit two masses are expected determine dispersion relation. Analyzing two-point functions axial charge density at nonvanishing spatial momentum, we predicted relation and residue pole...
The shear and bulk viscosities in the Quark-Gluon Plasma are quantities of enormous interest for collisions heavy ions at RHIC LHC. Using lattices up to ${144}^{3}$ x $36$ size, applying gradient flow blocking methods with high precision, authors compute these $1.5$ times deconfining transition temperature pure glue theory. This shows that obtaining values dynamical quarks, which can be compared directly experiment, is feasible near future.
Doubly heavy tetraquarks have emerged as new probes to study the hadron spectrum. With experimental observation of $J^P=1^+$ $T_{cc}^+$, they pose a unique opportunity bring together efforts in experiment, phenomenology, and lattice QCD. In calculations are accessible ground states, unlike hidden flavor tetraquarks, this enables accurate determinations scattering parameters alongside binding energies these tetraquarks. Today, firmly predict $T_{bb}^{ud}$ $T_{bb}^{us}$ QCD bound while recent...
A bstract We study diquarks on the lattice in background of a static quark, gauge-invariant formalism with quark masses down to almost physical m π . determine mass differences between diquark channels as well diquark-quark differences. The lightest and next-to-lightest have “good” scalar, $$ {\overline{3}}_F <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mover> <mml:mn>3</mml:mn> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>F</mml:mi> </mml:msub> </mml:math> ,...
Some of the biggest achievements modern era particle physics, such as discovery Higgs boson, have been made possible by tremendous effort in building and operating large-scale experiments like Large Hadron Collider or Tevatron. In these facilities, ultimate theory to describe matter at most fundamental level is constantly probed verified. These often produce large amounts data that require storing, processing, analysis techniques push limits traditional information processing schemes. Thus,...