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[en] We suggest a new approach for calculating heavy-to-light form factors. The method is based on light cone sum rules (LCSR) and covers the whole kinematical range of momentum transfer. The derivation of the new sum rule uses a suitable combination of double and single dispersion integrals. As an example we give numerical results for the form factor f+ for the B → pion transition. (author)
Journal
Journal of High Energy Physics; ISSN 1126-6708; 
; v. 01(2001); p. vp
; v. 01(2001); p. vp