Lattice study of B→π semileptonic decay using nonrelativistic lattice QCD
Physical Review D 58 巻 1 号
014502-1-014502-17 頁
1998-05-15 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Lattice study of B→π semileptonic decay using nonrelativistic lattice QCD
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| 作成者 |
Hashimoto Shoji
Ishikawa Ken-Ichi
Matsufuru Hideo
Onogi Tetsuya
Yamada Norikazu
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| 収録物名 |
Physical Review D
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| 巻 | 58 |
| 号 | 1 |
| 開始ページ | 014502-1 |
| 終了ページ | 014502-17 |
| 抄録 |
We present an exploratory lattice study of B→π semileptonic decay form factors using nonrelativistic lattice QCD for a heavy quark with a Wilson light quark on a 163×32 quenched lattice at β=5.8. The matrix elements are calculated at eight values of the heavy quark mass in the range of 1.5–8 GeV and with three values of light quark mass. The 1/mB corrections to the matrix elements are found to be fairly small except for the spatial component proportional to the B-meson momentum. We find that the q2 dependence of the form factor f+(q2) near q2 max becomes much stronger for a larger heavy quark mass, which may suggest an increase in the pole contribution. We perform a model independent fit of the form factors and study whether the q2 dependence is consistent with the pole contribution. Although the soft pion theorem predicts f0(q2 max) =fB / fπ in the chiral limit, we observe a significant violation of this relation.
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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
American Physical Society
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| 発行日 | 1998-05-15 |
| 権利情報 |
Copyright (c) 1998 The American Physical Society.
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| 出版タイプ | Version of Record（出版社版。早期公開を含む） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 1550-7998
[DOI] 10.1103/PhysRevD.58.014502
[NCID] AA00773624
[DOI] http://dx.doi.org/10.1103/PhysRevD.58.014502
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