B meson B-parameters and the decay constant in two-flavor dynamical QCD

Nuclear Physics B - Proceedings Supplements Volume 106-107 Page 397-399 published_at 2002-03

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Title ( eng )	B meson B-parameters and the decay constant in two-flavor dynamical QCD
Creator	JLQCD Collaboration Yamada N Aoki S Burkhalter R Fukugita M Hashimoto S Ishikawa Kenichi Ishizuka N Iwasaki Y Kanaya K Kaneko T Kuramashi Y Okawa Masanori Onogi T Tominaga S Tsutsui N Ukawa A Yoshie Y
Source Title	Nuclear Physics B - Proceedings Supplements
Volume	106-107
Start Page	397
End Page	399
Abstract	We present a two-flavor dynamical QCD calculation of the B meson B parameters and decay constant. We use NRQCD for heavy quark and the nonperturbatively O(a)-improved Wilson action for light quark at β = 5.2 on a 203 × 48 lattice. We confirm that the sea quark effect increases the heavy-light decay constant, while estimate of its magnitude depends significantly on the fitting form in the chiral extrapolation. For the B parameters, on the other hand, we do not find a significant sea quark effect. The chiral extrapolation with logarithmic term is examined for both quantities and compared with the prediction of ChPT.
Keywords	QCD calculation NRQCD B meson B-parameters
NDC	Physics [ 420 ]
Language	eng
Resource Type	journal article
Publisher	Elsevier Science B.V.
Date of Issued	2002-03
Rights	Copyright (c) 2002 Elsevier Science B.V.
Publish Type	Version of Record
Access Rights	open access
Source Identifier	[ISSN] 0920-5632 [DOI] 10.1016/S0920-5632(01)01726-1 [DOI] http://dx.doi.org/10.1016/S0920-5632(01)01726-1 isVersionOf