A5033038808- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- stochastic dynamics and bifurcation
- Fractional Differential Equations Solutions
- Diffusion and Search Dynamics
- Medical Imaging Techniques and Applications
- Black Holes and Theoretical Physics
- Atmospheric and Environmental Gas Dynamics
- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Advanced Thermodynamics and Statistical Mechanics
- Cosmology and Gravitation Theories
Carnegie Mellon University
2022-2024
Missouri University of Science and Technology
2019-2020
Brookhaven National Laboratory
2020
This Letter presents the first lattice QCD computation of coupled channel <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mi>π</a:mi><a:mi mathvariant="normal">Σ</a:mi><a:mtext>−</a:mtext><a:mover accent="true"><a:mrow><a:mi>K</a:mi></a:mrow><a:mrow><a:mo stretchy="false">¯</a:mo></a:mrow></a:mover><a:mi>N</a:mi></a:mrow></a:math> scattering amplitudes at energies near 1405 MeV. These contain resonance <f:math xmlns:f="http://www.w3.org/1998/Math/MathML"...
A lattice QCD computation of the coupled channel <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>π</a:mi><a:mi mathvariant="normal">Σ</a:mi><a:mi>–</a:mi><a:mover accent="true"><a:mi>K</a:mi><a:mo stretchy="false">¯</a:mo></a:mover><a:mi>N</a:mi></a:math> scattering amplitudes in <f:math xmlns:f="http://www.w3.org/1998/Math/MathML" display="inline"><f:mi mathvariant="normal">Λ</f:mi><f:mo stretchy="false">(</f:mo><f:mn>1405</f:mn><f:mo...
We analyze the clustering of galaxies in first public data release HSC Subaru Strategic Program. Despite relatively small footprints observed fields, are an excellent proxy for deep photometric datasets that will be acquired by LSST, and therefore ideal test bed analysis methods being implemented LSST DESC. select a magnitude limited sample with $i<24.5$ it four redshift bins covering $0.15\lesssim z \lesssim1.5$. carry out Fourier-space two-point this sample, including all auto-...
Elastic nucleon-pion scattering amplitudes are computed using lattice QCD on a single ensemble of gauge field configurations with Nf=2+1 dynamical quark flavors and mπ=200MeV. The s-wave lengths both total isospins I=1/2 I=3/2 inferred from the finite-volume spectrum below inelastic threshold together p-wave containing Δ(1232) resonance. well-described by effective range expansion parameters constrained fits to energy levels, enabling determination length statistical errors 5%, while is...
We use lattice QCD calculations of the finite-volume spectra systems two and three mesons to determine, for first time, three-particle scattering amplitudes with physical quark masses. Our results are combinations $\pi^+$ $K^+$, at a spacing $a=0.063\;$fm, in isospin-symmetric limit. also obtain accurate maximal-isospin two-meson amplitudes, those $\pi^+ K^+$ $2K^+$ being determinations point. Dense obtained using stochastic Laplacian-Heaviside method, analysis leading is done relativistic...
Fractional Brownian motion (FBM), a non-Markovian self-similar Gaussian stochastic process with long-ranged correlations, represents widely applied, paradigmatic mathematical model of anomalous diffusion. We report the results large-scale computer simulations FBM in one, two, and three dimensions presence reflecting boundaries that confine to finite regions space. Generalizing earlier for semi-infinite one-dimensional intervals, we observe interplay between long-time correlations leads...
We investigate anomalous diffusion processes governed by the fractional Langevin equation and confined to a finite or semi-infinite interval reflecting potential barriers. As random damping forces in fulfill appropriate fluctuation-dissipation relation, probability density on converges for long times towards expected uniform distribution prescribed thermal equilibrium. In contrast, with wall at origin, shows pronounced deviations from Gaussian behavior observed normal diffusion. If...
Progress in computing various meson-baryon scattering amplitudes is presented on a single ensemble from the Coordinated Lattice Simulations (CLS) consortium with $m_\pi=200$ MeV and $N_f=2+1$ dynamical fermions. The finite-volume Luscher approach employed to determine lowest few partial waves ground- excited-state energies computed correlation matrices rotated pivot using generalized eigenvector solution. This analysis requires evaluating of functions between single- two-hadron interpolating...
This report summarizes results of the first lattice QCD calculation coupled-channel πΣ − K ¯ N scattering in Λ(1405) region. study was carried out using a single CLS ensemble with heavier-than-physical pion mass m π ≈ 200 MeV and lighter-than-physical kaon 487 MeV. Once finite-volume energy spectrum has been reliably extracted, Lüscher method employed to obtain amplitudes. Through variety parametrizations two-channel -matrix, final show virtual bound state below threshold resonance right .