Lattice NRQCD calculation of the B0-B̅0 mixing parameter BB
Physical Review D Volume 60 Issue 9
Page 094503-1-094503-10
published_at 1999-09-27
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| File | |
| Title ( eng ) |
Lattice NRQCD calculation of the B0-B̅0 mixing parameter BB
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| Creator |
Hashimoto Shoji
Ishikawa Ken-Ichi
Matsufuru Hideo
Onogi Tetsuya
Yamada Norikazu
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| Source Title |
Physical Review D
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| Volume | 60 |
| Issue | 9 |
| Start Page | 094503-1 |
| End Page | 094503-10 |
| Abstract |
We present a lattice calculation of the B meson B parameter BB using the NRQCD action. The heavy quark mass dependence is explicitly studied over a mass range between mb and 4mb with the O(1/mQ) and O(1/mQ2) actions. We find that the ratios of lattice matrix elements 〈ONlat〉/〈A0lat〉2 and 〈OSlat〉/〈A0lat〉2, which contribute to BB through mixing, have significant 1/mQ dependence while that of the leading operator 〈OLlat〉/〈A0lat〉2 has little 1/mQ effect. The combined result for BB(mb) has small but nonzero mass dependence, and the BB(mb) becomes smaller by 10% with the 1/mQ correction compared to the static result. Our result in the quenched approximation at β=5.9 is BBd(5 GeV) = 0.75(3)(12), where the first error is statistical and the second is a systematic uncertainty.
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 1999-09-27 |
| Rights |
Copyright (c) 1999 The American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 1550-7998
[DOI] 10.1103/PhysRevD.60.094503
[NCID] AA00773624
[DOI] http://dx.doi.org/10.1103/PhysRevD.60.094503
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