On calculations within the nonlinear sigma model

16th International workshop on Advanced Computing and Analysis Techniques in physics research

物理学;计算机科学

Kampf, Karol^1

Institute of Particle and Nuclear Physics, Charles University, V Holeovikách 2, Prague, Czech Republic^1

关键词: Effective field theory;    Feynman diagrams;    Goldstone bosons;    Lagrangian description;    Nonlinear sigma model;    Recursion relations;    Theoretical physics;    Tree-level scattering;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/608/1/012079/pdf
DOI  :  10.1088/1742-6596/608/1/012079

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The chiral SU(N) nonlinear sigma model represents one of the simplest case of effective field theory. For the last several decades it has played an extremely important role not only for the low energy phenomenology but also in many other areas of theoretical physics. In this talk we will focus on the tree-level scattering amplitudes of the n-Goldstone bosons. It will be shown that it can be reconstructed using the BCFW-like recursion relations. This method, which does not rely on the Lagrangian description, is much more efficient than the standard Feynman diagram techniques.