| Thème(s) : |
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Physique/Physique des Hautes Energies - Phénoménologie
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| Titre : |
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Determination of light quark masses from eta-->3pi0 |
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| Auteur : |
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A. Deandrea1, A. Nehme, P. Talavera |
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| Laboratoire : |
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| Résumé : |
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We provide a model-independent determination of the quantity B_0(m_d-m_u). Our approach rests only on chiral symmetry and data from the decay of the eta into three neutral pions. Since the low-energy prediction at next-to-leading order fails to reproduce the experimental results, we keep the strong interaction correction as an unknown parameter. As a first step, we relate this parameter to the quark mass difference using data from the Dalitz plot. A similar relation is obtained using data from the decay width. Combining both relations we obtain B_0(m_d-m_u)=(4495 +/- 440) MeV^2. We use the preceding value to estimate the size of the violation of Dashen's theorem and the quark mass ratio m_u/m_d. |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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Date de publication
ou d'écriture : |
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2008 |
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| Nom du périodique : |
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| Physical Review D (Phys. Rev. D) |
| Publisher |
American Physical Society |
| ISSN |
1550-7998 (eISSN : 1550-2368) |
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| Volume : |
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78 |
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| Page/Article : |
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034032 |
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| Identifiant local : |
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LYCEN 2008-03 |
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| Classification PACS : |
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12.39.Fe, 11.30.Rd, 14.40.Aq |
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| Commentaire : |
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10 pages |
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