Precision study of B* B pi coupling for the static heavy-light meson - INSPIRE

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Precision study of B* B pi coupling for the static heavy-light meson

S. Negishi
(
- Kyoto U., Yukawa Inst., Kyoto
)
,
H. Matsufuru
(
- KEK, Tsukuba
)
,
T. Onogi
(
- Kyoto U., Yukawa Inst., Kyoto
)

Dec, 2006

30 pages

Published in:

Prog.Theor.Phys. 117 (2007) 275-303

e-Print:

hep-lat/0612029 [hep-lat]

DOI:

10.1143/PTP.117.275

Report number:

YITP-06-68,
KEK-CP-188

View in:

ADS Abstract Service

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Abstract:

We compute the B^*B\pi coupling \hat{g}_{\infty} for static heavy-light meson using all-to-all propagators. It is shown that low-mode averaging with 100 low-lying eigenmodes indeed improves the signal for the 2-point and 3-point functions for heavy-light meson significantly. Our study suggests that the all-to-all propagator will be a very efficient method for high precision computation of the B^*B\pi coupling especially in unquenched QCD where the number of configurations is limited.

lattice field theory: action
quantum chromodynamics
coupling: (B*(5320) B pi)
two-point function
vertex function
propagator
B: semileptonic decay
B: form factor
CKM matrix
PCAC model

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Figures(0)

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