70 citations · 285 across the 27 of their papers we have counts for
27 papers
Form factors for semileptonic B-decays with HISQ light quarks and clover b-quarks in Fermilab interpretation
Hwancheol Jeong, Carleton DeTar, Aida El-Khadra +7
We compute the vector, scalar, and tensor form factors for the , , and amplitudes, which are needed to describe semileptonic -meson decay rates for bo…
Two-link Staggered Quark Smearing in QUDA
Steven Gottlieb, Hwancheol Jeong, Alexei Strelchenko
Gauge covariant smearing based on the 3D lattice Laplacian can be used to create extended operators that have better overlap with hadronic ground states. For staggered quarks, we m…
Light-quark connected intermediate-window contributions to the muon hadronic vacuum polarization from lattice QCD
Alexei Bazavov, Christine Davies, Carleton DeTar +18
We present a lattice-QCD calculation of the light-quark connected contribution to window observables associated with the leading-order hadronic vacuum polarization contribution to…
Calculating the QED correction to the hadronic vacuum polarisation on the lattice
Gaurav Ray, Alexei Bazavov, Christine Davies +11
Isospin-breaking corrections to the hadron vacuum polarization component of the anomalous magnetic moment of the muon are needed to ensure the theoretical precision of is b…
D-meson semileptonic decays to pseudoscalars from four-flavor lattice QCD
Alexei Bazavov, Carleton DeTar, Aida X. El-Khadra +16
We present lattice-QCD calculations of the hadronic form factors for the semileptonic decays , , and . Our calculation uses the highly impro…
Deep learning study on the Dirac eigenvalue spectrum of staggered quarks
Hwancheol Jeong, Chulwoo Jung, Seungyeob Jwa +8
We study the chirality of staggered quarks on the Dirac eigenvalue spectrum using deep learning (DL) techniques. The Kluberg-Stern method to construct staggered bilinear operators…
Performance of several Lanczos eigensolvers with HISQ fermions
Hwancheol Jeong, Carleton DeTar, Steven Gottlieb
We investigate the state-of-the-art Lanczos eigensolvers available in the Grid and QUDA libraries. They include Implicitly Restarted Lanczos, Thick-Restart Lanczos, and Block Lancz…
Progress report on computing the disconnected QCD and the QCD plus QED hadronic contributions to the muon's anomalous magnetic moment
Alexei Bazavov, Christine Davies, Carleton DeTar +10
We report progress on calculating the contribution to the anomalous magnetic moment of the muon from the disconnected hadronic diagrams with light and strange quarks and the valenc…
Chiral symmetry and taste symmetry from the eigenvalue spectrum of staggered Dirac operators
Hwancheol Jeong, Chulwoo Jung, Seungyeob Jwa +8
We investigate general properties of the eigenvalue spectrum for improved staggered quarks. We introduce a new chirality operator and a new shift operator $[1 \ot…
Chiral Ward identities for Dirac eigenmodes with staggered fermions
Hwancheol Jeong, Chulwoo Jung, Sunghee Kim +2
We study chiral properties of eigenvalue spectrum for staggered quarks. We present a new method to identify would-be zero modes and nonzero modes using their symmetry and chiral pr…
Update on form factor at zero-recoil using the Oktay-Kronfeld action
Tanmoy Bhattacharya, Rajan Gupta, Sungwoo Park +9
We present an update on the calculation of semileptonic form factor at zero recoil using the Oktay-Kronfeld bottom and charm quarks on fl…
How to identify zero modes for improved staggered fermions
Hwancheol Jeong, Seungyeob Jwa, Jangho Kim +4
We present results of the eigenvalue spectrum for the staggered Diräc operator obtained using a modified Lanczos algorithm. We identify zero modes and non-zero modes. We derive the…
Tuning the hopping parameter in the Oktay-Kronfeld action for charm and bottom quarks on a MILC HISQ ensemble
Hwancheol Jeong, Weonjong Lee, Jaehoon Leem +4
The first step in the calculation of semi-leptonic form factors in the decay of heavy mesons is the tuning of the hopping parameter for the charm and bottom quark masses. Resul…
Non-perturbative Renormalization of Bilinear Operators on Fine Lattice
Hwancheol Jeong, Jangho Kim, Weonjong Lee +2
We present results of the wave function renormalization factor and mass renormalization factor obtained using non-perturbative renormalization (NPR) method in the RI-MO…
Performance of GTX Titan X GPUs and Code Optimization
Hwancheol Jeong, Sangbaek Lee, Weonjong Lee +3
Recently Nvidia has released a new GPU model: GTX Titan X (TX) in a linage of the Maxwell architecture. We use our conjugate gradient code and non-perturbative renormalization code…
Kaon BSM B-parameters using improved staggered fermions from unquenched QCD
Benjamin J. Choi, Yong-Chull Jang, Chulwoo Jung +10
We present results for the matrix elements of the additional operators that appear in models of physics beyond the Standard Model (BSM), expressed in terms of four BSM -p…
Code Optimization on Kepler GPUs and Xeon Phi
Yong-Chull Jang, Hwancheol Jeong, Jangho Kim +3
Kepler GTX Titan Black and Kepler Tesla K40 are still the best GPUs for high performance computing, although Maxwell GPUs such as GTX 980 are available in the market. Hence, we mea…
Calculation of BSM Kaon B-parameters using Staggered Quarks
Yong-Chull Jang, Hwancheol Jeong, Jangho Kim +9
We present updated results for kaon B-parameters for operators arising in models of new physics. We use HYP-smeared staggered quarks on the MILC asqtad lattices. During…
Non-perturbative Renormalization of Four-Fermion Operators Relevant to with Staggered Quarks
Hwancheol Jeong, Jangho Kim, Jongjeong Kim +3
We present preliminary results of matching factors of the four-fermion operators relevant to , which are obtained using the non-perturbative renormalization (NPR) method in th…
Improved determination of with staggered quarks
Taegil Bae, Yong-Chull Jang, Hwancheol Jeong +12
We present results for the kaon mixing parameter obtained using improved staggered fermions on a much enlarged set of MILC asqtad lattices. Compared to our previous publicati…
Performance of Kepler GTX Titan GPUs and Xeon Phi System
Hwancheol Jeong, Weonjong Lee, Jeonghwan Pak +6
NVIDIA's new architecture, Kepler improves GPU's performance significantly with the new streaming multiprocessor SMX. Along with the performance, NVIDIA has also introduced many ne…
Update on and with staggered quarks
Taegil Bae, Yong-Chull Jang, Hwancheol Jeong +11
We update our results for obtained using HYP-smeared staggered valence quarks on the MILC asqtad lattices. In the last year, we have added 5 new measurments on the fine ($a\a…
Beyond the Standard Model B-parameters with improved staggered fermions in QCD
Taegil Bae, Yong-Chull Jang, Hwancheol Jeong +10
We calculate the kaon mixing B-parameters for operators arising generically in theories of physics beyond the standard model. We use HYP-smeared improved staggered fermions on the…
Neutral kaon mixing from new physics: matrix elements in QCD
Taegil Bae, Yong-Chull Jang, Hwancheol Jeong +11
We present results for matrix elements of four-fermion operators arising generically in models of new physics. These are needed to constrain such models using the measured v…