arXiv:2309.07892·v1·High Energy Physics — Phenomenology
Pseudoscalar current and covariance with the light-front approach
Jurandi Leãoo (Laboratório de Física Teórica e Computacional-LFTC, Universidade Cruzeiro do Sul / Universidade Cidade de São Paulo, and Instituto Federal de São Paulo, Avenida Bahia, Caraguatatuba, 11665-071 São Paulo, Brazil)🇧🇷 · J. P. B. C. de Melo (Laboratório de Física Teórica e Computacional-LFTC, Universidade Cruzeiro do Sul / Universidade Cidade de São Paulo, 015060-000, São Paulo, SP, Brazil)🇧🇷
Abstract
Quantum Field Theory (QFT) is used to describe the physics of particles in terms of their fundamental constituents. The Light-Front Field Theory~(LFFT), introduced by Paul Dirac in 1949, is an alternative approach to solve some of the problems that arise in quantum field theory. The LFFT is similar to the Equal Time Quantum Field Theory~(EQT), however, some particularities are not, such as the loss of covariance in the light-front. Pion electromagnetic form factor is studied in this work at lower and higher momentum transfer regions to explore the constituent quark models and the differences among these and other models. The electromagnetic current is calculated with both the ``plus'' and ``minus'' components in the light-front approach. The results are compared with other models, as well as with experimental data.
Comments: To appear Revista Mexicana de Fisica (2023). 10 eps figures. arXiv admin note: substantial text overlap with arXiv:1610.05669