Tau decay and the structure of the a1
High Energy Physics - Phenomenology
2008-12-18 v2 Nuclear Theory
Abstract
We analyse the decay based on the recently developed techniques to generate axial-vector resonances dynamically. Under the assumption that the a1 is a coupled-channel meson-molecule, the spectral function is described surprisingly well by adjusting only one free parameter. Including, in addition, an elementary a1 corrupts the results.
Keywords
Cite
@article{arxiv.0708.2223,
title = {Tau decay and the structure of the a1},
author = {Markus Wagner and Stefan Leupold},
journal= {arXiv preprint arXiv:0708.2223},
year = {2008}
}
Comments
Replaced figures, due to an error in the calculation, which we corrected. (Conclusions did not change.) Dropped last part discussing higher order effect in favour of further elucidation