D* D pi and B* B pi couplings in QCD
Sep, 1994
30 pages
Published in:
- Phys.Rev.D 51 (1995) 6177-6195
e-Print:
- hep-ph/9410280 [hep-ph]
Report number:
- MPI-PHT-94-62,
- CEBAF-TH-94-22,
- LMU-15-94
Citations per year
Abstract: (arXiv)
We calculate the and couplings using QCD sum rules on the light-cone. In this approach, the large-distance dynamics is incorporated in a set of pion wave functions. We take into account two-particle and three-particle wave functions of twist 2, 3 and 4. The resulting values of the coupling constants are and . From this we predict the partial width \Gamma (D^{*+} \ra D^0 \pi^+ )=32 \pm 5~ keV . We also discuss the soft-pion limit of the sum rules which is equivalent to the external axial field approach employed in earlier calculations. Furthermore, using and the pole dominance model for the B \ra \pi and D\ra \pi semileptonic form factors is compared with the direct calculation of these form factors in the same framework of light-cone sum rules.Note:
- 27 pages (LATEX) +3 figures enclosed as .uu file MPI-PhT/94-62 , CEBAF-TH-94-22, LMU 15/94
- coupling: (D*(2010) D pi)
- (D*(2010) D pi): coupling
- coupling: (B*(5320) B pi)
- (B*(5320) B pi): coupling
- quantum chromodynamics: sum rule
- sum rule: light cone
- pi: wave function
- effect: higher-twist
- D*(2010): hadronic decay
- hadronic decay: D*(2010)
References(56)
Figures(0)