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B -> D* l nu at zero recoil: an update · Around

2010

B -> D* l nu at zero recoil: an update

Bailey, Jon A., Bazavov, A., Bernard, C. et al.

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We present an update of our calculation of the form factor for B -> D* l nu at zero recoil, with higher statistics and finer lattices.

As before, we use the Fermilab action for b and c quarks, the asqtad staggered action for light valence quarks, and the MILC ensembles for gluons and light quarks (L\"uscher-Weisz married to 2+1 rooted staggered sea quarks).
In this update, we have reduced the total uncertainty on F(1) from 2.6% to 1.7%.
At Lattice2010 we presented a still-blinded result, but this writeup includes the unblinded result from the September 2010 CKM workshop.

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C. Bernard et al. [Fermilab Lattice and MILC Collaborations], Phys. Rev. D 79

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