Abstract
The coupling $g_{B^\ast B \pi}$ is related to the form factor at zero momentum of the axial current between $B^\ast$- and $B$-states. This form factor is evaluated on the lattice using static heavy quarks and light quark propagators determined by a stochastic inversion of the fermionic bilinear. The $\gBBP$ coupling is related to the coupling $g$ between heavy mesons and low-momentum pions in the effective heavy meson chiral lagrangian. The coupling of the effective theory can therefore be computed by numerical simulations. We find the value $g = 0.42(4)(8)$. Besides its theoretical interest, the phenomenological implications of such a determination are discussed.
Original language | Undefined/Unknown |
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Pages (from-to) | 23 |
Number of pages | 1 |
Journal | Journal of High Energy Physics |
Volume | 1998 |
DOIs | |
Publication status | Published - 20 Jul 1998 |
Keywords / Materials (for Non-textual outputs)
- Lattice gauge field theories
- B-Physics