Electromagnetic effects in eta --> 3 pi
Autoři: | Ditsche, Christoph, Kubis, Bastian, Meißner, Ulf-G. |
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Zdroj: | PoS CD09 (2009) 043 |
Rok vydání: | 2009 |
Místo uložení: | High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Experiment |
Témata: | High Energy Physics - Phenomenology, High Energy Physics - Experiment, Nuclear Experiment |
Popis: | We re-evaluate the electromagnetic corrections to eta --> 3 pi decays at next-to-leading order in the chiral expansion, arguing that effects of order e^2(m_d-m_u) disregarded so far are not negligible compared to other contributions of order e^2 times a light quark mass. Despite the appearance of the Coulomb pole in eta --> pi+ pi- pi0 and cusps in eta --> 3 pi0, the overall corrections remain small. Comment: 9 pages, 5 figures, talk given at 6th International Workshop on Chiral Dynamics, Bern, Switzerland, July 6-10, 2009 |
Druh dokumentu: | Working Paper |
Přístupová URL adresa: | http://arxiv.org/abs/0910.0210 |
Přírůstkové číslo: | edsarx.0910.0210 |
Autor: | Ditsche, Christoph, Kubis, Bastian, Meißner, Ulf-G. |
Rok vydání: | 2009 |
Předmět: | |
Zdroj: | PoS CD09 (2009) 043 |
Druh dokumentu: | Working Paper |
Popis: | We re-evaluate the electromagnetic corrections to eta --> 3 pi decays at next-to-leading order in the chiral expansion, arguing that effects of order e^2(m_d-m_u) disregarded so far are not negligible compared to other contributions of order e^2 times a light quark mass. Despite the appearance of the Coulomb pole in eta --> pi+ pi- pi0 and cusps in eta --> 3 pi0, the overall corrections remain small. Comment: 9 pages, 5 figures, talk given at 6th International Workshop on Chiral Dynamics, Bern, Switzerland, July 6-10, 2009 |
Databáze: | arXiv |
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