EPJ Web of Conferences
Volume 3, 201019th International IUPAP Conference on Few-Body Problems in Physics
|Number of page(s)||12|
|Published online||12 April 2010|
Cusp effects in meson decays
Helmholtz-Institut fūr Strahlen- und Kernphysik (Theorie) and
Bethe Center for Theoretical Physics, Universität Bonn, D-53115 Bonn,
a e-mail: firstname.lastname@example.org
The pion mass diﬀerence generates a pronounced cusp in the π0 π0 invariant mass distribution of K+ → π0 π0 π+ decays. As originally pointed out by Cabibbo, an accurate measurement of the cusp may allow one to pin down the S-wave pion–pion scattering lengths to high precision. We present the non-relativistic eﬀective ﬁeld theory framework that permits to determine the structure of this cusp in a straightforward manner, including the eﬀects of radiative corrections. Applications of the same formalism to other decay channels, in particular η and η′ decays, are also discussed.
© Owned by the authors, published by EDP Sciences, 2010
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.