Lattice study of semileptonic {ital B} decays: {ital {bar B}}{r_arrow}{ital Dl}{bar {nu}} decays
- Department of Physics & Astronomy, The University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom)
- Centre de Physique Theorique, CNRS Luminy, Case 907, F-13288 Marseille Cedex 9 (France)
- Physics Department, The University, Southampton SO7 1BJ (United Kingdom)
We then use these functions, in conjunction with heavy-quark effective theory, to extract {ital V}{sub {ital c}{ital b}} with no free parameters from the {ital {bar B}}{r_arrow}{ital D}{sup *}{ital l}{bar {nu}} decay rate measured by the ALEPH, ARGUS, and CLEO Collaborations. Using the CLEO data, for instance, we obtain {vert_bar}{ital V}{sub {ital c}{ital b}}{vert_bar} =0.037{sub {minus}1{minus}2{minus}1}{sup +1+2+4}[0.99/1+{beta}{sup {ital A}}{sub 1}(1)]1/1 +{delta}{sub 1/{ital m}{ital c}}{sup 2}, where {delta}{sub 1/{ital m}{ital c}}{sup 2} is the power correction inversely proportional to the square of the charm quark mass, and {beta}{sup {ital A}}{sub 1}(1) is the relevant radiative correction at zero recoil. Here, the first set of errors is experimental, the second represents the statistical error, and the third represents the systematic error in our evaluation of the Isgur-Wise function. We also use our Isgur-Wise functions and heavy-quark effective theory to calculate branching ratios for {ital {bar B}}{sub ({ital s})}{r_arrow}{ital D}{sub ({ital s})}{ital l}{bar {nu}} and {ital {bar B}}{sub ({ital s})}{r_arrow}{ital D}{sub ({ital s})}{sup *}{ital l}{bar {nu}} decays.
- OSTI ID:
- 118547
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 52; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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