Abstract
We present preliminary results from our analysis of the form factors for the B → D*lv decay at non-zero recoil. Our analysis includes 15 MILC asqtad ensembles with Nf = 2 + 1 flavors of sea quarks and lattice spacings ranging from a ≈ 0.15 fm down to 0.045 fm. The valence light quarks employ the asqtad action, whereas the heavy quarks are treated using the Fermilab action. We conclude with a discussion of future plans and phenomenological implications. When combined with experimental measurements of the decay rate, our calculation will enable a determination of the CKM matrix element |Vcb|.
Highlights
IntroductionThe Standard Model (SM) is widely regarded as a very successful theory, its description of nature is not fully satisfactory, and it is believed to be incomplete
The Standard Model (SM) is widely regarded as a very successful theory, its description of nature is not fully satisfactory, and it is believed to be incomplete. This fact has set a large part of the scientific community in the search for physics Beyond the Standard Model (BSM)
Experimental measurements of this decay rate are precise for large momenta, but noisy at low recoil, due to a supression of the phase space [4]
Summary
The Standard Model (SM) is widely regarded as a very successful theory, its description of nature is not fully satisfactory, and it is believed to be incomplete. This fact has set a large part of the scientific community in the search for physics Beyond the Standard Model (BSM). One way to obtain |Vcb| is from the decay rate of B → D∗ ν Experimental measurements of this decay rate are precise for large momenta, but noisy at low recoil, due to a supression of the phase space [4]. In this work we present first, preliminary results of our lattice QCD calculation of the form factors for the B → D∗ ν process at non-zero recoil
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