A5055816526- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Physics of Superconductivity and Magnetism
- Superconducting Materials and Applications
- Black Holes and Theoretical Physics
- Coding theory and cryptography
- Sociology and Education Studies
- Scientific Computing and Data Management
- Neutrino Physics Research
- Advanced NMR Techniques and Applications
- Retinal Imaging and Analysis
- Quantum chaos and dynamical systems
- Arts, Culture, and Music Studies
- Psychology, Coaching, and Therapy
- Muon and positron interactions and applications
- Cryptography and Residue Arithmetic
- Cryptographic Implementations and Security
- Fluid Dynamics Simulations and Interactions
- Diagnosis and treatment of tuberculosis
- Structural Analysis of Composite Materials
- Quantum and Classical Electrodynamics
University of Connecticut
2015-2024
Brookhaven National Laboratory
2008-2023
RIKEN BNL Research Center
2007-2023
San Francisco State University
2014-2022
Institute for High Energy Physics
2019-2022
Fordham University
2014-2022
Technical University of Munich
2021
Universitat Autònoma de Barcelona
2019
Michigan State University
2019
Columbia University
2007-2017
We review the present status of Standard Model calculation anomalous magnetic moment muon. This is performed in a perturbative expansion fine-structure constant $\alpha$ and broken down into pure QED, electroweak, hadronic contributions. The QED contribution by far largest has been evaluated up to including $\mathcal{O}(\alpha^5)$ with negligible numerical uncertainty. electroweak suppressed $(m_\mu/M_W)^2$ only shows at level seventh significant digit. It two loops known better than one...
We report the first result for hadronic light-by-light scattering contribution to muon anomalous magnetic moment with all errors systematically controlled. Several ensembles using 2+1 flavors of physical mass Möbius domain-wall fermions, generated by RBC and UKQCD collaborations, are employed take continuum infinite volume limits finite lattice QED+QCD. find a_{μ}^{HLbL}=7.87(3.06)_{stat}(1.77)_{sys}×10^{-10}. Our value is consistent previous model results leaves little room this notoriously...
We have simulated QCD using 2+1 flavors of domain wall quarks on a $(2.74 {\rm fm})^3$ volume with an inverse lattice scale $a^{-1} = 1.729(28)$ GeV. The up and down (light) are degenerate in our calculations we used four values for the ratio light quark masses to strange (heavy) mass simulations: 0.217, 0.350, 0.617 0.884. measured pseudoscalar meson decay constants, kaon bag parameter $B_K$ vector couplings. SU(2) chiral perturbation theory, which assumes only small, SU(3) theory...
We present a first-principles lattice QCD+QED calculation at physical pion mass of the leading-order hadronic vacuum polarization contribution to muon anomalous magnetic moment. The total up, down, strange, and charm quarks including QED strong isospin breaking effects is a_{μ}^{HVP LO}=715.4(18.7)×10^{-10}. By supplementing data for very short long distances with R-ratio data, we significantly improve precision LO}=692.5(2.7)×10^{-10}. This currently most precise determination LO}.
We present results for several light hadronic quantities ($f_\pi$, $f_K$, $B_K$, $m_{ud}$, $m_s$, $t_0^{1/2}$, $w_0$) obtained from simulations of 2+1 flavor domain wall lattice QCD with large physical volumes and nearly-physical pion masses at two spacings. perform a short, O(3)%, extrapolation in mass to the values by combining our new data simultaneous chiral/continuum `global fit' number other ensembles heavier masses. use $m_\pi$, $m_K$ $m_\Omega$ determine quark scale - all are outputs...
We present a general class of unbiased improved estimators for physical observables in lattice gauge theory computations which significantly reduces statistical errors at modest computational cost. The idea can be easily adapted to other branches physics and science that employ Monte Carlo methods. error reduction techniques, referred as covariant approximation averaging, utilize approximations are under symmetry transformations. observe cost reductions from the new method compared...
We report the first lattice QCD calculation of complex kaon decay amplitude $A_0$ with physical kinematics, using a $32^3\times 64$ volume and single spacing $a$, $1/a= 1.3784(68)$ GeV. find Re$(A_0) = 4.66(1.00)(1.26) \times 10^{-7}$ GeV Im$(A_0) -1.90(1.23)(1.08) 10^{-11}$ GeV, where error is statistical second systematic. The value in approximate agreement experimental result: 3.3201(18) while can be used to compute direct CP violating ratio...
We compute the standard Euclidean window of hadronic vacuum polarization using multiple independent blinded analyses. improve continuum and infinite-volume extrapolations dominant quark-connected light-quark isospin-symmetric contribution address additional subleading systematic effects from sea-charm quarks residual chiral-symmetry breaking first principles. find ${a}_{\mathrm{\ensuremath{\mu}}}^{\mathrm{W}}=235.56(65)(50)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}10}$, which is...
The hadronic light-by-light scattering contribution to the muon anomalous magnetic moment, <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mo stretchy="false">(</a:mo><a:mi>g</a:mi><a:mo>−</a:mo><a:mn>2</a:mn><a:mo stretchy="false">)</a:mo><a:mrow><a:mo>/</a:mo><a:mn>2</a:mn></a:mrow></a:mrow></a:math>, is computed in infinite volume QED framework with lattice QCD. We report <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"...
It is widely recognized that security issues will play a crucial role in the majority of future computer and communication systems. Central tools for achieving system are cryptographic algorithms. For performance as well physical reasons, it often advantageous to realize algorithms hardware. In order overcome well-known drawback reduced flexibility associated with traditional ASIC solutions, this contribution proposes arithmetic architectures which optimized modern field programmable gate...
The Proceedings of the 2011 workshop on Fundamental Physics at Intensity Frontier. Science opportunities intensity frontier are identified and described in areas heavy quarks, charged leptons, neutrinos, proton decay, new light weakly-coupled particles, nucleons, nuclei, atoms.
The most compelling possibility for a new law of nature beyond the four fundamental forces comprising standard model high-energy physics is discrepancy between measurements and calculations muon anomalous magnetic moment. Until now key part calculation, hadronic light-by-light contribution, has only been accessible from models QCD, quantum description strong force, whose accuracy at required level may be questioned. A first principles calculation with systematically improvable errors needed,...
We present new results for the amplitude ${A}_{2}$ a kaon to decay into two pions with isospin $I=2$: $\mathrm{Re}{A}_{2}=1.50(4{)}_{\text{stat}}(14{)}_{\text{syst}}\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}8}\text{ }\text{ }\mathrm{GeV}$; $\mathrm{Im}{A}_{2}=\ensuremath{-}6.99(20{)}_{\text{stat}}(84{)}_{\text{syst}}\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}13}\text{ }\mathrm{GeV}$. These were obtained from ensembles generated at physical quark masses (in limit)...
We present a new class of statistical error reduction techniques for Monte-Carlo simulations. Using covariant symmetries, we show that correlation functions can be constructed from inexpensive approximations without introducing any systematic bias in the final result. introduce approximation averaging techniques, known as all-mode (AMA), which takes account contributions all eigenmodes through inverse Dirac operator computed conjugate gradient method with relaxed stopping condition. In this...
We present physical results for a variety of light hadronic quantities obtained via combined analysis three $2+1$ flavour domain wall fermion ensemble sets. For two our sets we used the Iwasaki gauge action with $\ensuremath{\beta}=2.13$ (${a}^{\ensuremath{-}1}=1.75(4)\text{ }\text{ }\mathrm{GeV}$) and $\ensuremath{\beta}=2.25$ (${a}^{\ensuremath{-}1}=2.31(4)\text{ lattice sizes ${24}^{3}\ifmmode\times\else\texttimes\fi{}64$ ${32}^{3}\ifmmode\times\else\texttimes\fi{}64$ respectively,...
We report on the computation of connected light-quark vacuum polarization with $2+1+1$ flavors highly improved staggered quarks [Follana et al., Phys. Rev. D 75, 054502 (2007).] fermions at physical point and its contribution to muon anomalous magnetic moment. Three ensembles, generated by MILC collaboration, are used take continuum limit. The finite-volume correction this result is computed in (Euclidean) time-momentum representation next-to-next-to-leading order (NNLO) chiral perturbation...
The quark-connected part of the hadronic light-by-light scattering contribution to muon's anomalous magnetic moment is computed using lattice QCD with chiral fermions. We report several significant algorithmic improvements and demonstrate their effectiveness through specific calculations which show a reduction in statistical errors by more than an order magnitude. most realistic these performed near-physical, $171$ MeV pion mass on $(4.6\;\mathrm{fm})^3$ spatial volume $32^3\times 64$...
We report a lattice QCD calculation of the hadronic light-by-light contribution to muon anomalous magnetic moment at physical pion mass. The includes connected diagrams and leading, quark-line-disconnected diagrams. incorporate algorithmic improvements developed in our previous work. was performed on 48^{3}×96 ensemble generated with mass 5.5 fm spatial extent by RBC UKQCD Collaborations using chiral, domain wall fermion formulation. find a_{μ}^{HLbL}=5.35(1.35)×10^{-10}, where error is...
We extend our previous work on the light-quark connected part, $a_μ^{\rm HVP,lqc}$, of leading order hadronic-vacuum-polarization (HVP) contribution to muon anomalous magnetic moment $a_μ$, using staggered fermions, in several directions. have collected more statistics ensembles with lattice spacings $0.06$, $0.09$ and $0.12$ fm, we added two new ensembles, both spacing $0.15$ but different volumes. The increased allow us reduce statistical errors HVP,lqc}$ related window quantities...
It is widely recognized that security issues will play a crucial role in the majority of future computer and communication systems. Central tools for achieving system are cryptographic algorithms. This contribution proposes arithmetic architectures which optimized modern field programmable gate arrays (FPGAs). The proposed perform modular exponentiation with very long integers. operation at heart many practical public-key algorithms such as RSA discrete logarithm schemes. We combine...
We present results for light meson masses and pseudoscalar decay constants from the first of a series lattice calculations with $2+1$ dynamical flavors domain wall fermions Iwasaki gauge action. The work reported here was done at fixed spacing about 0.12 fm on ${16}^{3}\ifmmode\times\else\texttimes\fi{}32$ lattice, which amounts to spatial volume $(2\text{ }\text{ }\mathrm{fm}{)}^{3}$ in physical units. number sites fifth dimension is 16, gives ${m}_{\mathrm{res}}=0.00308(4)$ these...
We present a lattice calculation of the hadronic vacuum polarization and lowest order contribution (HLO) to muon anomalous magnetic moment, ${a}_{\ensuremath{\mu}}=(g\ensuremath{-}2)/2$, using $2+1$ flavors improved staggered fermions. A precise fit low-${q}^{2}$ region is necessary accurately extract $g\ensuremath{-}2$. To obtain this fit, we use chiral perturbation theory, including model incorporate vector particles as resonances, compare these polynomial fits data. discuss results...
We report on the first realistic ab initio calculation of a hadronic weak decay, that amplitude A(2) for kaon to decay into two π mesons with isospin 2. find ReA(2)=(1.436±0.063(stat)±0.258(syst))10(-8) GeV in good agreement experimental result and hitherto unknown imaginary part we ImA(2)=-(6.83±0.51(stat)±1.30(syst))10(-13) GeV. Moreover combining our ImA(2) values ReA(2), ReA(0), ε'/ε, obtain following value ratio ImA(0)/ReA(0) within standard model:...
We describe the computation of amplitude ${A}_{2}$ for a kaon to decay into two pions with isospin $I=2$. The results presented in [T. Blum et al., Phys. Rev. Lett. 108, 141601 (2012)] from an analysis 63 gluon configurations are updated 146 giving $\mathrm{Re}{A}_{2}=1.381(46{)}_{\mathrm{stat}}(258{)}_{\mathrm{syst}}{10}^{\ensuremath{-}8}\text{ }\text{ }\mathrm{GeV}$ and $\mathrm{Im}{A}_{2}=\ensuremath{-}6.54(46{)}_{\mathrm{stat}}(120{)}_{\mathrm{syst}}{10}^{\ensuremath{-}13}\text{...