152 citations · 609 across the 44 of their papers we have counts for
43 papers · 1 filter
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…
Masses and decay constants of pions and kaons in mixed-action staggered chiral perturbation theory
Jon A. Bailey, Hyung-Jin Kim, Jongjeong Kim +2
Lattice QCD calculations with different staggered valence and sea quarks can be used to improve determinations of quark masses, Gasser-Leutwyler couplings, and other parameters rel…
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…
Charmed and light pseudoscalar meson decay constants from four-flavor lattice QCD with physical light quarks
A. Bazavov, C. Bernard, C. M. Bouchard +20
We compute the leptonic decay constants , , and , and the quark-mass ratios and in unquenched lattice QCD using the experimentally de…
Toolkit for staggered matrix elements
Jongjeong Kim, Weonjong Lee, Jaehoon Leem +2
A recent numerical lattice calculation of the kaon mixing matrix elements of general four-fermion operators using staggered fermions relied on two auxiliary theoretical calc…
The , , and decay constants from flavor lattice QCD
A. Bazavov, C. Bernard, C. Bouchard +23
We present a study of the and leptonic decay constants on the MILC asqtad gauge ensembles using asqtad-improved staggered light quarks and clover heavy quarks in…
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…
Heavy-meson semileptonic decays for the Standard Model and beyond
Yuzhi Liu, Ran Zhou, Jon A. Bailey +25
We calculate the form factors for the semileptonic decays and with lattice QCD. We work at several lattice spacings and a range of light quark mass…
Charmed and strange pseudoscalar meson decay constants from HISQ simulations
A. Bazavov, C. Bernard, C. Bouchard +20
We update our determinations of , , , and quark mass ratios from simulations with four flavors of HISQ dynamical quarks. The availability of ensembles with l…
Flavored pions and kaons at next-to-leading order in mixed-action staggered chiral perturbation theory
Jon A. Bailey, Jongjeong Kim, Weonjong Lee +2
Different versions of improved staggered fermions can be used as valence quarks to reduce discretization effects in lattice QCD calculations while increasing statistics on existing…
K semileptonic form factor with HISQ fermions at the physical point
E. Gámiz, A. Bazavov, C. Bernard +21
We present results for the form factor , needed to extract the CKM matrix element from experimental data on semileptonic decays, on the HISQ $N_f=2+1+1…
Update on and with staggered quarks
Taegil Bae, Yong-Chull Jang, Hwancheol Jeong +11
We update our results for obtained using HYP-smeared staggered valence quarks on the MILC asqtad lattices. In the last year, we have added 5 new measurments on the fine ($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…
Non-perturbative Renormalization of Bilinear Operators with Improved Staggered Quarks
Jangho Kim, Jongjeong Kim, Weonjong Lee +1
We present renormalization factors for the bilinear operators obtained using the non-perturbative renormalization method (NPR) in the RI-MOM scheme with improved staggered fermions…
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…
Two-point Correlator Fits on HISQ Ensembles
A. Bazavov, C. Bernard, C. Bouchard +22
We present our methods to fit the two point correlators for light, strange, and charmed pseudoscalar meson physics with the highly improved staggered quark (HISQ) action. We make u…
Kaon semileptonic vector form factor and determination of |V_{us}| using staggered fermions
A. Bazavov, C. Bernard, C. M. Bouchard +21
Using staggered fermions and twisted boundary conditions, we calculate the K meson semileptonic decay vector form factor at zero momentum transfer. The HISQ formulation is used for…
Recent progress in calculation of using staggered fermions
Taegil Bae, Yong-Chull Jang, Hwancheol Jeong +11
We report on recent progress in the calculation of using HYP-smeared improved staggered fermions on the MILC asqtad lattices. We have added measurements on fine ($a\sim 0.09…
Beyond the Standard Model corrections to mixing
Jon A. Bailey, Taegil Bae, Yong-Chull Jang +11
We calculate the B-parameters for operators arising in theories of new physics beyond the standard model (BSM) using HYP-smeared improved staggered fermions on the MILC asqtad latt…
Pseudoscalar meson physics with four dynamical quarks
A. Bazavov, C. Bernard, C. Bouchard +22
We present preliminary results for light, strange and charmed pseudoscalar meson physics from simulations using four flavors of dynamical quarks with the highly improved staggered…
B_s->D_s/B->D Semileptonic Form-Factor Ratios and Their Application to BR(B^0_s->μ^+μ^-)
Jon A. Bailey, A. Bazavov, C. Bernard +23
We calculate form-factor ratios between the semileptonic decays \bar{B}->D^+\ell^-\barν and \bar{B}_s->D_s^+\ell^-\barν with lattice QCD. These ratios are a key theoretical input i…
Continuum extrapolation of with staggered fermions
Weonjong Lee, Yong-Chull Jang, Hyung-Jin Kim +8
We report on recent progress in the calculation of using HYP-smeared staggered fermions on the MILC asqtad lattices. Our main focus is on the continuum extrapolation, which i…
Kaon -parameter from improved staggered fermions in QCD
Taegil Bae, Yong-Chull Jang, Chulwoo Jung +9
We present a calculation of the kaon -parameter, , using lattice QCD. We use improved staggered valence and sea fermions, the latter generated by the MILC collaboration wit…
from improved staggered fermions using SU(3) chiral perturbation theory
Kwangwoo Kim, Yong-Chull Jang, Hyung-Jin Kim +8
We present recent progress in our calculation of with improved staggered fermions using chiral extrapolations based on SU(3) staggered chiral perturbation theory. We have acc…