Explanipedia

Update on B → D&lowast;lν form factor at zero-recoil using the Oktay-Kronfeld action Open

Rajan Gupta, Sungwoo Park, Tanmoy Bhattacharya, Yong-Chull Jang, Jon A. Bailey , et al. · 2024

Improvement of heavy-heavy and heavy-light currents with the Oktay-Kronfeld action Open

Jon A. Bailey, Yong-Chull Jang, Sunkyu Lee, Weonjong Lee, Jaehoon Leem · 2022

The CKM matrix elements $V_{cb}$ and $V_{ub}$ can be obtained by combining data from the experiments with lattice QCD results for the semi-leptonic form factors for the $\bar{B} \to D^\ast \ell \barν$ and $\bar{B} \to π\ell \barν$ decays. …

Update of $|V_{cb}|$ from the $\\bar{B}\\to D^*\\ell\\bar{\\nu}$ form factor at zero recoil with three-flavor lattice QCD Open

Jon A. Bailey · 2022

Improvement of heavy-heavy and heavy-light currents with the\n Oktay-Kronfeld action Open

Jon A. Bailey, Yong-Chull Jang, Sunkyu Lee, Weonjong Lee, Jaehoon Leem · 2020

The CKM matrix elements $V_{cb}$ and $V_{ub}$ can be obtained by combining\ndata from the experiments with lattice QCD results for the semi-leptonic form\nfactors for the $\\bar{B} \\to D^\\ast \\ell \\bar{\\nu}$ and $\\bar{B} \\to \\pi \\…

2018 update of $\varepsilon_K$ with lattice QCD inputs Open

Weonjong Lee, Jon A. Bailey, Sunkyu Lee, Yong-Chull Jang, Jaehoon Leem , et al. · 2019

We present updated results for $\varepsilon_K$ determined directly from the standard model (SM) with lattice QCD inputs such as $\hat{B}_K$, $|V_{cb}|$, $|V_{us}|$, $\xi_0$, $\xi_2$, $\xi_\text{LD}$, $F_K$, and $m_c$. We find that the stan…

Update on $B\to D^\ast \ell ν$ form factor at zero-recoil using the Oktay-Kronfeld action Open

Tanmoy Bhattacharya, Rajan Gupta, Sungwoo Park, Yong-Chull Jang, Jon A. Bailey , et al. · 2018

We present an update on the calculation of $\bar{B}\to D^\ast \ell \barν$ semileptonic form factor at zero recoil using the Oktay-Kronfeld bottom and charm quarks on $N_f=2+1+1$ flavor HISQ ensembles generated by the MILC collaboration. Pr…

Updated evaluation of in the standard model with lattice QCD inputs Open

Jon A. Bailey, Sunkyu Lee, Weonjong Lee, Jaehoon Leem, Sungwoo Park · 2018

We report a strong tension in $\varepsilon_K$ at the $4\sigma$ level between the experimental value and the theoretical value calculated directly from the standard model using lattice QCD inputs such as $\hat{B}_K$, $|V_{cb}|$, $|V_{us}|$,…

2018 Update on $\varepsilon_K$ with lattice QCD inputs Open

Jon A. Bailey, Sunkyu Lee, Weonjong Lee, Yong-Chull Jang, Jaehoon Leem , et al. · 2018

We present updated results for $\varepsilon_K$ determined directly from the standard model (SM) with lattice QCD inputs such as $\hat{B}_K$, $|V_{cb}|$, $|V_{us}|$, $ξ_0$, $ξ_2$, $ξ_\text{LD}$, $F_K$, and $m_c$. We find that the standard m…

$4\sigma$ tension in $\varepsilon_K$ obtained with lattice QCD inputs Open

Jon A. Bailey, Jaehoon Leem, Weonjong Lee, Sunkyu Lee, Sungwoo Park · 2018

We report a strong tension in $\varepsilon_K$ at the $4\sigma$ level between the experimental value and the theoretical value calculated directly from the standard model using lattice QCD inputs such as $\hat{B}_K$, $|V_{cb}|$, $|V_{us}|$,…

Bs → Kℓv form factors with 2+1 flavors Open

Yuzhi Liu, Jon A. Bailey, A. Bazavov, C. Bernard, Chris Bouchard , et al. · 2018

Using the MILC 2+1 flavor asqtad quark action ensembles, we are calculating the form factors f 0 and f + for the semileptonic B s → Kℓv decay. A total of six ensembles with lattice spacing from ≈ 0.12 to 0.06 fm are being used. At the coar…

calculation of B → D*lv form factor at zero recoil using the Oktay-Kronfeld action Open

Jon A. Bailey, Tanmoy Bhattacharya, Rajan Gupta, Yong-Chull Jang, Weonjong Lee , et al. · 2018

We present the first preliminary results for the semileptonic form factor h A 1 ( w = 1)/ ρ A j at zero recoil for the B → D*l v decay using lattice QCD with four flavors of sea quarks. We use the HISQ staggered action for the light valenc…

Calculation of $\bar B \rightarrow D^\ast \ell \bar \nu$ form factor at zero recoil using the Oktay-Kronfeld action Open

Jon A. Bailey, Tanmoy Bhattacharya, Rajan Gupta, Yong-Chull Jang, Weonjong Lee , et al. · 2017

We present the first preliminary results for the semileptonic form factor $h_{A_1}(w=1)/\rho_{A_j}$ at zero recoil for the $\bar B \rightarrow D^\ast \ell \bar \nu$ decay using lattice QCD with four flavors of sea quarks. We use the HISQ s…

Calculation of $\bar B \rightarrow D^\ast \ell \bar ν$ form factor at zero recoil using the Oktay-Kronfeld action Open

Jon A. Bailey, Tanmoy Bhattacharya, Rajan Gupta, Yong-Chull Jang, Weonjong Lee , et al. · 2017

We present the first preliminary results for the semileptonic form factor $h_{A_1}(w=1)/ρ_{A_j}$ at zero recoil for the $\bar B \rightarrow D^\ast \ell \bar ν$ decay using lattice QCD with four flavors of sea quarks. We use the HISQ stagge…

Masses and decay constants of pions and kaons in mixed-action staggered chiral perturbation theory Open

Jon A. Bailey, Jongjeong Kim, Weonjong Lee, Hyung Jin Kim, Boram Yoon · 2017

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 relevant to phenomenology. We calculate the masses and decay c…

Heavy-heavy current improvement for calculation of $\bar{B}\rightarrow D^{(*)}\ell \bar{\nu}$ semi-leptonic form factors using the Oktay-Kronfeld action Open

Jon A. Bailey, Jaehoon Leem, Weonjong Lee, Yong-Chull Jang · 2017

Lattice calculations of the form factors for $\bar{B}\to D^{(*)}\ell\bar{\nu}$ decays can be used to extract the CKM matrix element $|V_{cb}|$. The Oktay-Kronfeld action is a highly improved version of the Fermilab action, which systematic…

Heavy-quark meson spectrum tests of the Oktay-Kronfeld action Open

Jon A. Bailey, Yong-Chull Jang, Weonjong Lee, Carleton DeTar, Andreas S. Kronfeld , et al. · 2017

The Oktay-Kronfeld (OK) action extends the Fermilab improvement program for massive Wilson fermions to higher order in suitable power-counting schemes. It includes dimension-six and -seven operators necessary for matching to QCD through or…

Heavy-heavy current improvement for calculation of $\bar{B}\rightarrow D^{(*)}\ell \barν$ semi-leptonic form factors using the Oktay-Kronfeld action Open

Jon A. Bailey, Jaehoon Leem, Weonjong Lee, Yong-Chull Jang · 2016

Lattice calculations of the form factors for $\bar{B}\to D^{(*)}\ell\barν$ decays can be used to extract the CKM matrix element $|V_{cb}|$. The Oktay-Kronfeld action is a highly improved version of the Fermilab action, which systematically…

Status report on $\varepsilon_K$ with lattice QCD inputs Open

Weonjong Lee, Jon A. Bailey, Jaehoon Leem, Sungwoo Park, Yong-Chull Jang · 2016

We report the current status of $\epsK$, the indirect CP violation parameter in the neutral kaon system, evaluated using the lattice QCD inputs. We use lattice QCD to fix $\BK$, $\xi_0$, $\xi_2$, $|V_{us}|$, $m_c(m_c)$, and $|V_{cb}|$. Sin…

Status report on $\varepsilon_K$ with lattice QCD inputs Open

Jon A. Bailey, Weonjong Lee, Jaehoon Leem, Sungwoo Park, Yong-Chull Jang · 2016

We report the current status of $\varepsilon_K$, the indirect CP violation parameter in the neutral kaon system, evaluated using the lattice QCD inputs. We use lattice QCD to fix $\hat{B}_K$, $ξ_0$, $ξ_2$, $|V_{us}|$, $m_c(m_c)$, and $|V_{…

Determination of $\varepsilon_K$ using lattice QCD inputs Open

Weonjong Lee, Jon A. Bailey, Yong-Chull Jang, Sungwoo Park · 2016

SWME CollaborationWe present results for the indirect CP violation parameter ε K determined directly from the standard model using lattice QCD to fix the inputs BK , ξ 0 , |V us |, and |V cb |.We use the FLAG and SWME results for BK .We us…

Update on the Heavy-Meson Spectrum Tests of the Oktay--Kronfeld Action Open

Yong-Chull Jang, Jon A. Bailey, Weonjong Lee, Carleton DeTar, Andreas S. Kronfeld , et al. · 2016

Fermilab Lattice, MILC, and SWME CollaborationsWe present updated results of a numerical improvement test with heavy-meson spectrum for the Oktay-Kronfeld (OK) action.The OK action is an extension of the Fermilab improvement program for ma…

decay form factors from three-flavor lattice QCD Open

Jon A. Bailey, A. Bazavov, C. Bérnard, Chris Bouchard, Carleton DeTar , et al. · 2016

We compute the form factors for the B → Kl⁺l^- semileptonic decay process in lattice QCD using gauge-field ensembles with 2+1 flavors of sea quark, generated by the MILC Collaboration. The ensembles span lattice spacin…

Update on Heavy-Meson Spectrum Tests of the Oktay--Kronfeld Action Open

Jon A. Bailey, Yong-Chull Jang, Weonjong Lee, Carleton DeTar, Andreas S. Kronfeld , et al. · 2016

We present updated results of a numerical improvement test with heavy-meson spectrum for the Oktay--Kronfeld (OK) action. The OK action is an extension of the Fermilab improvement program for massive Wilson fermions including all dimension…

Determination of $\varepsilon_K$ using lattice QCD inputs Open

Jon A. Bailey, Yong-Chull Jang, Weonjong Lee, Sungwoo Park · 2015

We present results for the indirect CP violation parameter $\varepsilon_K$ determined directly from the standard model using lattice QCD to fix the inputs $\hat{B}_K$, $ξ_0$, $|V_{us}|$, and $|V_{cb}|$. We use the FLAG and SWME results for…

Form Factors for New Physics Searches from Lattice QCD Open

Jon A. Bailey, A. Bazavov, C. Bérnard, Chris Bouchard, Carleton DeTar , et al. · 2015

The rare decay B→πℓ^{+}ℓ^{-} arises from b→d flavor-changing neutral currents and could be sensitive to physics beyond the standard model. Here, we present the first ab initio QCD calculation of the B→π tensor form factor f_{T}. Together w…

Standard model evaluation ofusing lattice QCD inputs forand Open

Jon A. Bailey, Yong-Chull Jang, Weonjong Lee, Sungwoo Park · 2015

We report the Standard Model evaluation of the indirect CP violation\nparameter $\\varepsilon_K$ using inputs determined from lattice QCD: the kaon\nbag parameter $\\hat{B}_K$, $\\xi_0$, $|V_{us}|$ from the $K_{\\ell 3}$ and\n$K_{\\mu 2}$ …

form factors at nonzero recoil andfrom-flavor lattice QCD Open

Jon A. Bailey, A. Bazavov, C. Bérnard, Chris Bouchard, Carleton DeTar , et al. · 2015

We present the first unquenched lattice-QCD calculation of the hadronic form\nfactors for the exclusive decay $\\overline{B} \\rightarrow D \\ell\n\\overline{\\nu}$ at nonzero recoil. We carry out numerical simulations on\nfourteen ensembl…

Heavy Meson Spectrum Tests of the Oktay-Kronfeld Action Open

Yong-Chull Jang, Jon A. Bailey, Weonjong Lee, Carleton DeTar, Andreas S. Kronfeld , et al. · 2015

Fermilab Lattice, MILC, and SWME CollaborationsWe present heavy-meson spectrum results obtained using the Oktay-Kronfeld (OK) action on MILC asqtad lattices.The OK action was designed to improve the heavy-quark action of the Fermilab formu…

Current status of $\varepsilon_K$ calculated on the lattice Open

Weonjong Lee, Jon A. Bailey, Yong-Chull Jang · 2015

SWME CollaborationWe present results for ε K , the indirect CP violation parameter, calculated in the Standard Model using inputs from lattice QCD: the kaon bag parameter BK , and the CKM matrix element V cb from the axial current form fac…

Improved currents for B to D(*) ell nu form factors from Oktay-Kronfeld heavy quarks Open

Jon A. Bailey, Yong-Chull Jang, Weonjong Lee, Jaehoon Leem · 2015

Improved currents for heavy quarks

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