|
|
つくばリポジトリ (Tulips-R) >
0 コンテンツタイプ別 (Content type) >
01 雑誌発表論文等 (Journal article, etc.) >
Physical review D >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/2241/89382
|
| Title: | B meson leptonic decay constant with quenched lattice NRQCD |
| Authors: | Ishikawa, K-I.
Yamada, N.
Aoki, S.
Fukugita, M.
Hashimoto, S.
Ishizuka, N.
Iwasaki, Y.
Kanaya, K.
Kaneda, T.
Kaya, S.
Kuramashi, Y.
Matsufuru, H.
Okawa, M.
Onogi, T.
Tominaga, S.
Tsutsui, N.
Ukawa, A.
Yoshié, T.
岩崎, 洋一
宇川, 彰 |
| Issue Date: | Feb-2000 |
| Publisher: | American Physical Society |
| Journal Title: | Physical review D |
| Volume: | 61 |
| Issue: | 7 |
| Start Page: | 074501 |
| DOI: | 10.1103/PhysRevD.61.074501 |
| Abstract: | We present a lattice NRQCD study of the B meson decay constant in the quenched approximation with emphasis given to the scaling behavior. The NRQCD action and the heavy-light axial vector current we use include all terms of order 1/M and the perturbative O(αsa) and O(αs/M) corrections. Using simulations at three values of couplings β=5.7, 5.9, and 6.1 on lattices of sizes 123×32, 163×48, and 243×64, we find a significant a dependence disappears in fB if the O(αsa) correction is included in the axial vector current. We observe that β=5.9-6.1 is the window where systematic errors are expected to be minimum within one-loop improved theory. Our final results are fB=170(5)(15) MeV, fBs=191(4)(17)(-0+4) MeV, and fBs/fB=1.12(2)(1)(-0+3), where the first error is statistical, the second is systematic, and the third is due to the uncertainty of the strange quark mass, while quenching errors are not included. |
| URI: | http://hdl.handle.net/2241/89382 |
| Rights: | ©2000 The American Physical Society |
| Text Version: | publisher |
| Appears in Collections: | Physical review D
岩崎 洋一 (Iwasaki Yoichi)
宇川 彰 (Ukawa Akira)
|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
|
