Nucleon decay matrix elements from lattice QCD
Physical Review D 62 巻
014506- 頁
2000 発行
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e014506.pdf
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種類 :
全文
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タイトル ( eng ) |
Nucleon decay matrix elements from lattice QCD
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作成者 |
JLQCD Collaboration
Aoki S
Fukugita M
Hashimoto S
Ishizuka N
Iwasaki Y
Kanaya K
Kaneda T
Kaya S
Kuramashi Y
Onogi T
Tominaga S
Tsutsui N
Ukawa A
Yamada N
Yoshié T
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収録物名 |
Physical Review D
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巻 | 62 |
開始ページ | 014506 |
抄録 |
We present a model-independent calculation of hadron matrix elements for all dimension-6 operators associated with baryon number violating processes using lattice QCD. The calculation is performed with the Wilson quark action in the quenched approximation at β=6/g2=6.0 on a 282×48×80 lattice. Our results cover all the matrix elements required to estimate the partial lifetimes of (proton,neutron)→(π,K,η)+(ν̅,e+,μ+) decay modes. We point out the necessity of disentangling two form factors that contribute to the matrix element; previous calculations did not make the separation, which led to an underestimate of the physical matrix elements. With a correct separation, we find that the matrix elements have values 3–5 times larger than the smallest estimates employed in phenomenological analyses of the nucleon decays, which could give strong constraints on several GUT models. We also find that the values of the matrix elements are comparable with the tree-level predictions of the chiral Lagrangian.
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NDC分類 |
物理学 [ 420 ]
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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 |
The American Physical Society
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発行日 | 2000 |
権利情報 |
Copyright (c) 2000 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] http://dx.doi.org/10.1103/PhysRevD.62.014506
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