scholarly journals The CKM matrix and flavor physics from lattice QCD

2010 ◽  
Author(s):  
Ruth Van de Water
Keyword(s):  
Lattice Qcd ◽  
Flavor Physics ◽  
Ckm Matrix

scholarly journals D → Klv semileptonic decay using lattice QCD with HISQ at physical pion masses

2018 ◽  
Vol 175 ◽  
pp. 13027 ◽  
Author(s):  
Bipasha Chakraborty ◽  
Christine Davies ◽  
Jonna Koponen ◽  
G Peter Lepage
Keyword(s):  
Standard Model ◽  
Lattice Qcd ◽  
Semileptonic Decay ◽  
Light Quark ◽  
Form Factors ◽  
New Physics ◽  
Ckm Matrix ◽  
Quark Masses ◽  
The Standard Model ◽  
Fertile Ground

he quark flavor sector of the Standard Model is a fertile ground to look for new physics effects through a unitarity test of the Cabbibo-Kobayashi-Maskawa (CKM) matrix. We present a lattice QCD calculation of the scalar and the vector form factors (over a large q2 region including q2 = 0) associated with the D→ Klv semi-leptonic decay. This calculation will then allow us to determine the central CKM matrix element, Vcs in the Standard Model, by comparing the lattice QCD results for the form factors and the experimental decay rate. This form factor calculation has been performed on the Nf = 2 + 1 + 1 MILC HISQ ensembles with the physical light quark masses.

scholarly journals Opportunities for Lattice QCD in quark and lepton flavor physics

2019 ◽  
Vol 55 (11) ◽  
Author(s):  
Christoph Lehner ◽  
◽  
Stefan Meinel ◽  
Tom Blum ◽  
Norman H. Christ ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Flavor Physics ◽  
Lepton Flavor

scholarly journals Improvement of heavy-heavy current for calculation of B̅ → D(*)lv̅ form factors using Oktay-Kronfeld heavy quarks

2018 ◽  
Vol 175 ◽  
pp. 14010 ◽  
Author(s):  
Jon A. Bailey ◽  
Yong-Chull Jang ◽  
Weonjong Lee ◽  
Jaehoon Leem
Keyword(s):  
Matrix Element ◽  
Lattice Qcd ◽  
Heavy Quark ◽  
Recent Progress ◽  
Form Factors ◽  
Heavy Quarks ◽  
Power Counting ◽  
Ckm Matrix ◽  
Combining Data ◽  
Discretization Errors

The CKM matrix element |Vcb| can be extracted by combining data from experiments with lattice QCD results for the semileptonic form factors for the B̅ → D(*)lv̅ decays. The Oktay-Kronfeld (OK) action was designed to reduce heavy-quark discretization errors to below 1%, or through O(λ3) in HQET power counting. Here we describe recent progress on bottom-to-charm currents improved to the same order in HQET as the OK action, and correct formerly reported results of our matching calculations, in which the operator basis was incomplete.

Semileptonic decays of D, B, K mesons and the full CKM matrix from unquenched lattice QCD

2005 ◽  
Vol 20 (15) ◽  
pp. 3469-3475 ◽  
Author(s):  
◽  
Masataka Okamoto
Keyword(s):  
Lattice Qcd ◽  
Form Factors ◽  
Semileptonic Decays ◽  
Experimental Result ◽  
Particle Data Group ◽  
Matrix Elements ◽  
Ckm Matrix ◽  
Ckm Matrix Elements ◽  
K Mesons ◽  
Data Group

We use lattice QCD to fully determine the CKM matrix. |Vcd|, |Vcs|, |Vub|, |Vcb| and |Vus| are, respectively, directly determined with our lattice results for form factors of semileptonic D → πlν, D → Klν, B → πlν, B → Dlν and K → πlν decays. The accuracy is comparable to that of the Particle Data Group averages. In addition, |Vud|, |Vtb|, |Vts| and |Vtd| are determined by using unitarity of the CKM matrix and the experimental result for sin (2β). In this way, we obtain all 9 CKM matrix elements, where the only theoretical input is lattice QCD.

LEPTONIC D AND DS DECAYS FROM CLEO-c AND PROSPECTS FOR BESIII

2011 ◽  
Vol 02 ◽  
pp. 97-101
Author(s):  
ROY A. BRIERE
Keyword(s):  
Lattice Qcd ◽  
Leptonic Decay ◽  
Meson Decay ◽  
Matrix Elements ◽  
Ckm Matrix ◽  
Decay Constants ◽  
Ckm Matrix Elements

We first review recent measurements of D → μν and Ds → μν, τν from CLEO-c. These decays are used to determine leptonic decay constants fD and fDs which may be compared to modern Lattice QCD (LQCD) calculations. Such cross-checks can provide confidence in Lattice results for B(s) meson decay constants which are needed to fully exploit data used to extract the CKM matrix elements Vub and Vcb. We also comment briefly on the outlook for further progress at BESIII.

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