Andreas S. Kronfeld
A5077419504- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Physics of Superconductivity and Magnetism
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Medical Imaging Techniques and Applications
- Distributed and Parallel Computing Systems
- Nuclear physics research studies
- Cold Atom Physics and Bose-Einstein Condensates
- Particle accelerators and beam dynamics
- Scientific Computing and Data Management
- Radioactive Decay and Measurement Techniques
- Particle Detector Development and Performance
- Advanced Data Storage Technologies
- Quantum Mechanics and Applications
- Quantum chaos and dynamical systems
- Cosmology and Gravitation Theories
- Advanced NMR Techniques and Applications
- Nuclear Physics and Applications
Fermi National Accelerator Laboratory
2016-2025
Technical University of Munich
2014-2024
Institute for Advanced Study
2015-2024
Indiana University Bloomington
2005-2024
University of Illinois Urbana-Champaign
2001-2024
University of Utah
2012-2024
Universidad de Granada
2022-2024
Brookhaven National Laboratory
2022-2023
Michigan State University
2000-2023
University of Glasgow
2012-2023
This work is on the Physics of B Factories. Part A this book contains a brief description SLAC and KEK Factories as well their detectors, BaBar Belle, data taking related issues. discusses tools methods used by experiments in order to obtain results. The results themselves can be found C. Please note that version 3 archive auxiliary book. uses notation alpha, beta, gamma for angles Unitarity Triangle. nominal phi_1, phi_2 phi_3. cite Eur. Phys. J. C74 (2014) 3026.
This paper presents a formulation of lattice fermions applicable to all quark masses, large and small. We incorporate interactions from previous light-fermion heavy-fermion methods, thus ensure smooth connection these limiting cases. The couplings in improved actions are obtained for arbitrary fermion mass ${m}_{q},$ without expansions around small- or large-mass limits. treat both the action external currents. By interpreting on-shell improvement criteria through theory's Hamiltonian, one...
We present a new analysis of Langevin simulation techniques for lattice field theories, including general discussion errors and algorithm speed. introduce Fourier that greatly accelerate simulations on large lattices. also technique quark vacuum-polarization corrections admits any number flavors, odd or even, without the need nested Monte Carlo calculations. Our is supported by variety numerical experiments.
The recently developed Symanzik-improved staggered-quark discretization allows unquenched lattice-QCD simulations with much smaller (and more realistic) quark masses than previously possible. To test this formalism, we compare experiment a variety of nonperturbative calculations in QCD drawn from restricted set ``gold-plated'' quantities. We find agreement to within statistical and systematic errors $3%$ or less. discuss the implications for phenomenology and, particular, heavy-quark physics.
We present the physics program of Belle II experiment, located on intensity frontier SuperKEKB $e^+e^-$ collider. collected its first collisions in 2018, and is expected to operate for next decade. It anticipated collect 50/ab collision data over lifetime. This book outcome a joint effort collaborators theorists through theory interface platform (B2TiP), an that commenced 2014. The aim B2TiP was elucidate potential impacts program, which includes wide scope topics: B physics, charm, tau,...
We present the first unquenched lattice-QCD calculation of hadronic form factors for exclusive decay $\overline{B}\ensuremath{\rightarrow}D\ensuremath{\ell}\overline{\ensuremath{\nu}}$ at nonzero recoil. carry out numerical simulations on 14 ensembles gauge-field configurations generated with $2+1$ flavors asqtad-improved staggered sea quarks. The encompass a wide range lattice spacings (approximately 0.045 to 0.12 fm) and ratios light (up down) strange sea-quark masses ranging from 0.05...
We calculate the leptonic decay constants of heavy-light pseudoscalar mesons with charm and bottom quarks in lattice quantum chromodynamics on four-flavor QCD gauge-field configurations dynamical $u$, $d$, $s$, $c$ quarks. analyze over twenty isospin-symmetric ensembles six spacings down to $a\approx 0.03$~fm several values light-quark mass physical value $\frac{1}{2}(m_u+m_d)$. employ highly-improved staggered-quark (HISQ) action for sea valence quarks; finest spacings, discretization...
In the original version of this manuscript, an error was introduced on pp352. '2.7nb:1.6nb' has been corrected to '2.4nb:1.3nb' in current online and printed version. doi:10.1093/ptep/ptz106.
We calculate---for the first time in three-flavor lattice QCD---the hadronic matrix elements of all five local operators that contribute to neutral ${B}^{0}$- and ${B}_{s}$-meson mixing beyond Standard Model. present a complete error budget for each element also provide full set correlations among elements. corresponding bag parameters their correlations, as well specific combinations enter expression $B$-meson width difference. obtain most precise determination date SU(3)-breaking ratio...
We present a lattice-QCD calculation of the light-quark connected contribution to window observables associated with leading-order hadronic vacuum polarization anomalous magnetic moment muon, $a_\mu^{\mathrm{HVP,LO}}$. employ MILC Collaboration's isospin-symmetric QCD gauge-field ensembles, which contain four flavors dynamical highly-improved-staggered quarks lattice spacings between $a\approx 0.06$-$0.15$~fm and close-to-physical quark masses. consider several effective-field-theory-based...
We calculate the leptonic decay constants of ${B}_{(s)}$ and ${D}_{(s)}$ mesons in lattice QCD using staggered light quarks Fermilab bottom charm quarks. compute heavy-light-meson correlation functions on MILC Asqtad-improved gauge configurations, which include effects three dynamical sea simulate with several values valence- sea-quark masses (down to $\ensuremath{\sim}{m}_{s}/10$) at spacings ($a\ensuremath{\approx}0.15$, 0.12, 0.09 fm) extrapolate physical up down quark continuum...
We present a lattice-QCD calculation of the $B\to\pi\ell\nu$ semileptonic form factors and new determination CKM matrix element $|V_{ub}|$. use MILC asqtad 2+1-flavor lattice configurations at four spacings light-quark masses down to 1/20 physical strange-quark mass. extrapolate continuum using staggered chiral perturbation theory in hard-pion SU(2) limits. employ model-independent $z$ parameterization our from large-recoil momentum full kinematic range. introduce functional method propagate...
We compute the zero-recoil form factor for semileptonic decay ${\overline{B}}^{0}\ensuremath{\rightarrow}{D}^{*+}{\ensuremath{\ell}}^{\ensuremath{-}}\overline{\ensuremath{\nu}}$ (and modes related by isospin and charge conjugation) using lattice QCD with three flavors of sea quarks. use an improved staggered action light valence quarks (the MILC asqtad configurations), Fermilab heavy Our calculations incorporate higher statistics, finer spacings, lighter quark masses than our 2008 work. As a...
We compute the leptonic decay constants ${f}_{{D}^{+}}$, ${f}_{{D}_{s}}$, and ${f}_{{K}^{+}}$ quark-mass ratios ${m}_{c}/{m}_{s}$ ${m}_{s}/{m}_{l}$ in unquenched lattice QCD using experimentally determined value of ${f}_{{\ensuremath{\pi}}^{+}}$ for normalization. use MILC highly improved staggered quark ensembles with four dynamical flavors---up, down, strange, charm---and both physical unphysical values light sea-quark masses. The pions removes need a chiral extrapolation, thereby...
We calculate the form factor ${f}_{+}({q}^{2})$ for $B$-meson semileptonic decay in unquenched lattice QCD with $2+1$ flavors of light sea quarks. use Asqtad-improved staggered quarks and a Fermilab bottom quark on gauge configurations generated by MILC Collaboration. simulate several light-quark masses at two spacings, extrapolate to physical mass continuum limit using heavy-light meson chiral perturbation theory. then fit result simultaneously that measured BABAR experiment...
We compute the form factors for $B \to Kl^+l^-$ semileptonic decay process in lattice QCD using gauge-field ensembles with 2+1 flavors of sea quark, generated by MILC Collaboration. The span spacings from 0.12 to 0.045 fm and have multiple sea-quark masses help control chiral extrapolation. asqtad improved staggered action is used light valence quarks, clover Fermilab interpretation heavy $b$ quark. present results $f_+(q^2)$, $f_0(q^2)$, $f_T(q^2)$, where $q^2$ momentum transfer, together a...
We calculate the contribution to muon anomalous magnetic moment hadronic vacuum polarization from {the} connected diagrams of up and down quarks, omitting electromagnetism. employ QCD gauge-field configurations with dynamical $u$, $d$, $s$, $c$ quarks physical pion mass, analyze five ensembles lattice spacings ranging $a \approx 0.06$ to~0.15~fm. The up- down-quark masses in our simulations have equal $m_l$. obtain, this world where all pions mass $\pi^0$, $10^{10} a_\mu^{ll}({\rm conn.}) =...
As noted in Wikipedia, skin the game refers to having ‘incurred risk by being involved achieving a goal’, where ‘ is synecdoche for person involved, and metaphor actions on field of play under discussion’. For exascale applications development US Department Energy Exascale Computing Project, nothing could be more apt, with delivering comprehensive science-based computational that effectively exploit high-performance computing technologies provide breakthrough modelling simulation data...
We calculate the up-, down-, strange-, charm-, and bottom-quark masses using MILC highly improved staggered-quark ensembles with four flavors of dynamical quarks. use at six lattice spacings ranging from $a\approx0.15$~fm to $0.03$~fm both physical unphysical values two light strange sea-quark masses. a new method based on heavy-quark effective theory (HQET) extract quark heavy-light pseudoscalar meson Combining our analysis separate determination ratios light-quark we present up, down,...