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Differential decay rate of B→πlν semileptonic decay with lattice nonrelativistic QCD
http://hdl.handle.net/2241/89335
http://hdl.handle.net/2241/89335804c8e57-a6da-4a29-80b9-59a449cb7c3c
名前 / ファイル | ライセンス | アクション |
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PRD_64-11.pdf (334.5 kB)
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Item type | Journal Article(1) | |||||
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公開日 | 2007-05-21 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Differential decay rate of B→πlν semileptonic decay with lattice nonrelativistic QCD | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
著者 |
Aoki, S.
× Aoki, S.× Fukugita, M.× Hashimoto, S.× Ishikawa, K.-I.× Ishizuka, N.× 岩崎, 洋一× Kanaya, K.× Kaneko, T.× Kuramashi, Y.× Okawa, M.× Onogi, T.× Tominaga, S.× Tsutsui, N.× 宇川, 彰× Yamada, N.× Yoshie, T. |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We present a lattice QCD calculation of B→πlν semileptonic decay form factors in the small pion recoil momentum region. The calculation is performed on a quenched 16^3×48 lattice at β=5.9 with the nonrelativistic QCD action including the full 1/M terms. The form factors f1(v・kπ) and f2(v・kπ) defined in the heavy quark effective theory for which the heavy quark scaling is manifest are adopted, and we find that the 1/M correction to the scaling is small for the B meson. The dependence of the form factors on the light quark mass and on the recoil energy is found to be mild, and we use a global fit of the form factors at various quark masses and recoil energies to obtain model independent results for the physical differential decay rate. We find that the B* pole contribution dominates the form factor f+(q2) for small pion recoil energy, and obtain the differential decay rate integrated over the kinematic region q^2>18 GeV^2 to be ・|Vub| ^2×(1.18±0.37±0.08±0.31) psec^-1 where the first error is statistical the second is that from perturbative calculation and the third is the systematic error from the finite lattice spacing and the chiral extrapolation. We also discuss the systematic errors in the soft pion limit for f^0(q^2 max) in the present simulation. | |||||
言語 | en | |||||
書誌情報 |
en : Physical review D 巻 64, 号 11, p. 114505, 発行日 2001-11 |
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ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 2470-0010 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00773624 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1103/PhysRevD.64.114505 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | (c) 2001 The American Physical Society | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | American Physical Society | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2241/89335 | |||||
識別子タイプ | HDL |