New results on B→π,K,η decay form factors from light-cone sum rules
Abstract
We present an improved calculation of B→ light pseudoscalar form factors from light-cone sum rules, including one-loop radiative corrections to twist-2 and twist-3 contributions, and leading-order twist-4 corrections. The total theoretical uncertainty of our results at zero momentum transfer is 10 to 13% and can be improved, at least in part, by reducing the uncertainty of hadronic input parameters, in particular, those describing the twist-2 distribution amplitudes of the π, K, and η. We present our results in a way which details the dependence of the form factors on these parameters and facilitates the incorporation of future updates of their values from, e.g., lattice calculations.
- Publication:
-
Physical Review D
- Pub Date:
- January 2005
- DOI:
- 10.1103/PhysRevD.71.014015
- arXiv:
- arXiv:hep-ph/0406232
- Bibcode:
- 2005PhRvD..71a4015B
- Keywords:
-
- 12.38.Lg;
- 13.20.-v;
- Other nonperturbative calculations;
- Leptonic semileptonic and radiative decays of mesons;
- High Energy Physics - Phenomenology
- E-Print:
- 43 pages, 10 figures