A5001843477- 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
- Cold Atom Physics and Bose-Einstein Condensates
- Theoretical and Computational Physics
- Quantum chaos and dynamical systems
- Nuclear reactor physics and engineering
- Spectral Theory in Mathematical Physics
- Nuclear physics research studies
- Quantum many-body systems
- Superconducting Materials and Applications
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Nuclear Materials and Properties
- Computational Physics and Python Applications
- Advanced NMR Techniques and Applications
- Quantum, superfluid, helium dynamics
- Stochastic processes and statistical mechanics
- Quantum Mechanics and Non-Hermitian Physics
- Algebraic and Geometric Analysis
- Model Reduction and Neural Networks
- Matrix Theory and Algorithms
- Markov Chains and Monte Carlo Methods
University of Edinburgh
2005-2025
University of Bern
2016-2025
University of Bonn
2023-2025
TU Wien
2023
University of the Pacific
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre
2023
John von Neumann Institute for Computing
2005-2023
European Organization for Nuclear Research
2021-2022
Cyprus Institute
2017-2022
University of Southern Denmark
2022
We review lattice results related to pion, kaon, $D$-meson, $B$-meson, and nucleon physics with the aim of making them easily accessible nuclear particle communities. More specifically, we report on determination light-quark masses, form factor $f_+(0)$ arising in semileptonic $K \to \pi$ transition at zero momentum transfer, as well decay constant ratio $f_K/f_\pi$ its consequences for CKM matrix elements $V_{us}$ $V_{ud}$. Furthermore, describe obtained some low-energy constants...
Abstract We review lattice results related to pion, kaon, D -meson, B and nucleon physics with the aim of making them easily accessible nuclear particle communities. More specifically, we report on determination light-quark masses, form factor $$f_+(0)$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mi>f</mml:mi> <mml:mo>+</mml:mo> </mml:msub> <mml:mo>(</mml:mo> <mml:mn>0</mml:mn> <mml:mo>)</mml:mo> </mml:mrow> </mml:math> arising in semileptonic $$K...
We present a lattice QCD calculation of the up, down, strange and charm quark masses performed using gauge configurations produced by European Twisted Mass Collaboration with Nf = 2 + 1 dynamical quarks, which include in sea, besides two light mass degenerate also quarks close to their physical values. The simulations are based on unitary setup for mixed action approach quarks. analysis uses data at three values spacing pion range 210 - 450 MeV, allowing accurate continuum limit controlled...
We present a lattice determination of the leading-order hadronic vacuum polarization (HVP) contribution to muon anomalous magnetic moment, ${a}_{\ensuremath{\mu}}^{\mathrm{HVP}}$, in so-called short and intermediate time-distance windows, ${a}_{\ensuremath{\mu}}^{\mathrm{SD}}$ ${a}_{\ensuremath{\mu}}^{\mathrm{W}}$, defined by RBC/UKQCD Collaboration [Phys. Rev. Lett. 121, 022003 (2018)]. employ gauge ensembles produced Extended Twisted Mass (ETMC) with ${N}_{f}=2+1+1$ flavors Wilson-clover...
We present results of lattice QCD simulations with mass-degenerate up and down mass-split strange charm (N f = 2 + 1 1) dynamical quarks using Wilson twisted mass fermions at maximal twist. The tuning the quark masses is performed two values spacing a ≈ 0:078 fm 0:086 sizes ranging from L 1:9 to 2:8 fm. measure high statistical precision light pseudoscalar m PS decay constant in range 270 ≲ 510 MeV determine low energy parameters 0 $ {\bar{l}_{3,4}} SU(2) chiral perturbation theory. use...
We present a comprehensive investigation of light meson physics using maximally twisted mass fermions for N f = 2 mass-degenerate quark flavours. By employing four values the lattice spacing, spatial extents ranging from 2.0 fm to 2.5 and pseudo scalar masses in range 280 ≲ m PS 650MeV we control major systematic effects our calculation. This enables us confront data with SU(2) chiral perturbation theory extract low energy constants effective Lagrangian derived quantities, such as mass.
We present results on the nucleon scalar, axial, and tensor charges as well momentum fraction, helicity transversity moments. The pion fraction is also presented. computation of these key observables carried out using lattice QCD simulations at a physical value mass. evaluation based gauge configurations generated with two degenerate sea quarks twisted mass fermions clover term. investigate excited states contributions quantum numbers by analyzing three sink-source time separations. find...
We present a first-principles lattice QCD investigation of the R ratio between e^{+}e^{-} cross section into hadrons and muons. By using method Ref. [1], that allows one to extract smeared spectral densities from Euclidean correlators, we compute convoluted with Gaussian smearing kernels widths about 600 MeV central energies 220 up 2.5 GeV. Our theoretical results are compared corresponding quantities obtained by KNT19 compilation [2] R-ratio experimental measurements same and, centering...
We present results on the mass of nucleon and Delta using two dynamical degenerate twisted quarks tree-level Symanzik improved gauge action. The evaluation is performed at four quark masses corresponding to a pion in range about 300-600 MeV lattices 2.1-2.7 fm. check for cut-off effects by evaluating these baryon spatial size 2.1 fm beta=3.9 beta=4.05 lattice 2.4 beta=3.8. values we find are compatible within our statistical errors. Lattice extrapolated physical limit continuum chiral...
We present physics results from simulations of QCD using ${N}_{f}=2$ dynamical Wilson twisted mass fermions at the physical value pion mass. These are enabled by addition clover term to quark action. show evidence that compared previous without this term, splitting due isospin breaking is almost completely eliminated. Using new action, we compute masses and decay constants pseudoscalar mesons involving up down as well valence strange charm quarks one lattice spacing,...
We present a calculation of the up, down, strange and charm quark masses performed within lattice QCD framework. use twisted mass fermion action carry out simulations that include in sea two light mass-degenerate quarks, as well quarks. In analysis we gauge ensembles simulated at three values spacing with quarks correspond to pion range from 350 MeV physical value, while are tuned approximately their values. several quantities set scale order check for finite effects continuum limit get...
We study the infrared part of spectrum for UV-filtered staggered Dirac operators and compare them to overlap counterpart. With sufficient filtering at small enough lattice spacing spectra manage ``mimic'' version. They show a 4-fold near degeneracy, clear separation between would-be zero modes nonzero modes. This suggests an approximate index theorem filtered fermions correct sensitivity topology QCD. Moreover, it supports square-rooting determinant obtain dynamical ensembles with ${N}_{f}=2$.