name

Norikazu Yamada

refid

10719

email

nyamada@suchi.kek.jp

title

$B^0$-$\bar{B}^0$ mixing with quenched lattice NRQCD

collaboration

S. Aoki, M. Fukugita, S. Hashimoto, K-I. Ishikawa, N. Ishizuka, Y. Iwasaki, K. Kanaya, T. Kaneda S. Kaya,
Y. Kuramashi, M. Okawa, T. Onogi, S. Tominaga, N. Tsutsui, A. Ukawa, N. Yamada, T. Yoshi\'e
/JLQCD Collaboration

abstract

We present results for the $B$-paramerers which parametrize the $\Delta B$=2
transition amplitudes. Calculations are made in quenched QCD at $beta$=5.7,
5.9, and 6.1, using NRQCD for heavy quark and the $O(a)$-improved action
for light quark. The heavy-light operators are perturbatively renormalized
including corrections of order alpha_s/(aM). We examine scaling behavior of
the $B$-parameters in detail, and estimate systematic uncertainties from
scatter of results depending on analysis procedures adopted.

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