Electromagnetic effects in eta --> 3 pi

3 pi -->
Autoři: Ditsche, Christoph, Kubis, Bastian, Meißner, Ulf-G.
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