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Effective Lagrangian for heavy and light mesons: Semileptonic decays

R. Casalbuoni
(
- Florence U. and
- INFN, Florence
)
,
A. Deandrea
(
- Geneva U.
)
,
N. Di Bartolomeo
(
- Geneva U.
)
,
Raoul Gatto
(
- Geneva U.
)
,
F. Feruglio
(
- Padua U. and
- INFN, Padua
)

Nov, 1992

16 pages

Published in:

Phys.Lett.B 299 (1993) 139-150

e-Print:

hep-ph/9211248 [hep-ph]

DOI:

10.1016/0370-2693(93)90895-O

Report number:

UGVA-DPT-1992-11-790,
BARI-TH-92-125

View in:

ADS Abstract Service

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Abstract:

We introduce an effective lagrangian including negative and positive parity heavy mesons containing a heavy quark, light pseudoscalars, and light vector resonances, with their allowed interactions, using heavy quark spin-flavour symmetry, chiral symmetry, and the hidden symmetry approach for light vector resonances. On the basis of such a lagrangian, by considering the allowed weak currents and by including the contributions from the nearest unitarity poles we calculate the form factors for semileptonic decays of

B

and

D

mesons into light pseudoscalars and light vector resonances. The available data, together with some additional assumptions, allow for a set of predictions in the different semileptonic channels, which can be compared with those following {}from different approaches. A discussion of non-dominant terms in our approach, which attempts at including a rather complete dynamics, will however have to wait till more abundant data become available.

B: semileptonic decay
semileptonic decay: B
D: semileptonic decay
semileptonic decay: D
effective Lagrangian
hidden symmetry
HQET model
symmetry: chiral
current: weak interaction
weak interaction: current

References(37)

Figures(0)

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,
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