Home > Search Results: keywords:"Meson decays|Effective field theory|Strong interactions|Quark masses"
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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Decays of η to three pions
 Povišer, Martin ; Zdráhal, Martin (advisor) ; Kolesár, Marián (referee)
In this work, we summarize a method established in the published literature of dispersive construc- tion of amplitude for the ! decay process. We outline Chiral Perturbation Theory (ChPT) as an effective field theory for the description of low-energy hadron dynamics, and then introduce dispersive methods with the objective of constructing process amplitudes (up to the two-loop order) similar in form to ChPT predictions. The original contribution of the present work is a software library implementing the reconstruction procedure that forms the basis for the dispersive construction of mesonic process amplitudes. This library can be used to construct amplitudes in a computer algebra system (CAS) environment, making those forms of amplitude available to fitting of experimental data and theoretical studies, especially those focusing on the extraction of the up/down quark mass difference. 1
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