form factor

Update of $textbarV_b̧textbar$ from the $barBto Dtextasciicircum*ellbarnu$ form factor at zero recoil with three-flavor lattice QCD

We compute the zero-recoil form factor for the semileptonic decay $barBtextasciicircum0to Dtextasciicircum*+elltextasciicircum-barnu$ (and modes related by isospin and charge conjugation) using lattice QCD with three flavors of sea quarks. We use an …

Determination of $textbarV_ustextbar$ from a Lattice-QCD Calculation of the $Ktopiellnu$ Semileptonic Form Factor with Physical Quark Masses

We calculate the kaon semileptonic form factor $f_+(0)$ from lattice QCD, working, for the first time, at the physical light-quark masses. We use gauge configurations generated by the MILC collaboration with $N_f=2+1+1$ flavors of sea quarks, which …