name

Yusuke Taniguchi

refid

25387

email

tanigchi@het.ph.tsukuba.ac.jp

title

Kaon B parameter from the quenched domain-wall QCD

collaboration

CP-PACS Collaboration :
A.~Ali Khan, S.~Aoki, Y.~Aoki, R.~Burkhalter, S.~Ejiri,
M.~Fukugita, S.~Hashimoto, N.~Ishizuka, Y.~Iwasaki,
T.~Izubuchi, K.~Kanaya, T.~Kaneko, Y.~Kuramashi, T.~Manke,
K.~I.~Nagai, J.~Noaki, M.~Okawa, H.P.~Shanahan,
A.~Ukawa and T.~Yoshi\'e

abstract

We report results for the kaon B parameter $B_K$ calculated with
the domain-wall fermion action and a renormalization group improved
gauge action. The main simulations are made
on a $24^3\times 40$ lattice at the gauge coupling $\beta=2.6$
($1/a \simeq$ 2 GeV) and on a $32^3\times 60$ lattice at $\beta=2.9$
($1/a \simeq$ 3 GeV), using the fifth-dimensional length of $N_s=16$.
Systematic investigations are made on the finite spatial
volume effect and the fifth dimensional length dependence at
$\beta=2.6$, employing $(16^3,24^3,32^3)\times 40$ lattices for the former
and $N_s=16,32$ on $24^3\times 40$ lattices for the latter.
Matching of the lattice value to the continuum value is made with one-loop
perturbative Z factors. Scaling behavior and the continuum value of $B_K$
are discussed.

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