Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-12-09
Eur.Phys.J.C40:205-227,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
Version published in Eur.Phys.J.C.: 23 pages (LaTeX), 10 figures. Minor changes in text, typos removed, references updated, Sp
Scientific paper
10.1140/epjc/s2005-02123-3
Motivated by recent experimental results and ongoing measurements, we review the chiral perturbation theory prediction for radiative Ke3 decays (neutral kaons). Special emphasis is given on the stability of the inner bremsstrahlung-dominated relative branching ratio vs. the Ke3 form factors, and on the separation of the structure dependent amplitude in differential distributions over the phase space. For the structure dependent terms, an assessment of the order p^6 corrections is given. In particular, a full next-to-leading order calculation of the axial component is performed. The experimental analysis of the photon energy spectrum is discussed, and other potentially useful distributions are introduced.
Gasser Juerg
Kubis Bastian
Paver Nello
Verbeni Michela
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