The Isgur-Wise function on the lattice

2001/09/30 by UKQCD collaboration, G. N. Lacagnina
Physics and Astronomy · #hep-lat

paper · pdf

published as Nucl.Phys.Proc.Suppl. 106 (2002) 373-375 · Lattice 2001 proc., 3 pages, 3 figures

arxiv created 2001/10/08 · arxiv updated 2009/11/30

Abstract

The h+, h_A1 form factors for the semi-leptonic B->D and B->D* decays are evaluated in quenched lattice QCD with beta=6.2. The action and the operators are fully O(a) non-perturbatively improved. The Isgur-Wise function is evaluated and fitted to extract its slope; the latter is found to be rho²=1.1(2)(3) from the B->D* decay and rho²=1.0(2)(3) from the B->D decay. The form factors ratios R₁, R₂ are evaluated and found to be in agreement with experimental determinations.

Related

• The Isgur Wise function from the Lattice
• Semileptonic B→ D and B→ D^* Decays from the Lattice
• Lattice Calculations of B to K/K*l+l- form factors
• Lattice Calculations of Semileptonic Form Factors
• Semileptonic decay of a heavy-light pseudoscalar to a light vector meson