Phenomenology of the particle physics and nucleus in the light-front formalism

• Grant number: 15/16295-5
• Support Opportunities: Regular Research Grants
• Start date: December 01, 2015
• End date: November 30, 2017
• Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
• Principal Investigator: Joao Pacheco Bicudo Cabral de Mello
• Grantee: Joao Pacheco Bicudo Cabral de Mello
• Host Institution: Pró-Reitoria de Pós-Graduação e Pesquisa. Universidade Cruzeiro do Sul (UNICSUL). São Paulo , SP, Brazil
• Associated researchers: Kazuo Tsushima

Abstract

In this project, we use the formulation of the Quantum Field Theory on the Light Front (QFTLF); in order to study the structure of mesons, baryons and light nuclei with the constituents,, i.e, in terms of itsdegrees of freedom of quarks and gluons, from the quantum chromodynamics (QCD).The fact of choice in use the Quantum Light-Front Field Theory formulation,it is that with this formulation have certain advantages compared with the usual formulation of the quantum field theory (equal time)which will be discussed in this project.In the light-front the quantization, we have problems related to the loss of some symmetries,among these are a loss of rotational symmetry when the Fock space is truncated. The loss of rotational invariance is treated in description of composite particles spin-0,which are the pseudoscalares mesons, such as the pion and kaon. For spin-1 particles, we have mesons, like rho meson and kaon-sta, also the deuteron.In recent work, we use component, J^+=J^0 +J^3, (plus component of the electromagnetic current) to study scalar mesons, as the pi meson and kaon and vector such asrho meson. We try extend this work to other mesons. In addition, we will studythe properties of mesons and baryons, with quantum light-front field theory in dense media. (AU)

Scientific publications

(8)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DE CONTO, G.; MACHADO, A. C. B.; DE MELO, J. P. B. C.. The Higgs boson in the minimal 3-3-1 model. Physics Letters B, v. 784, p. 255-260, SEP 10 2018. (15/16295-5, 17/05660-0)

DE MELO, J. P. B. C.; TSUSHIMA, K.; AHMED, I.. In-medium pion valence distributions in a light-front model. Physics Letters B, v. 766, p. 125-131, MAR 10 2017. (15/16295-5, 16/04191-3, 15/17234-0)

YABUSAKI, GEORGE H. S.; DE MELO, J. P. B. C.; DE PAULA, WAYNE; TSUSHIMA, K.; FREDERICO, T.. In-Medium K+ Electromagnetic Form Factor with a Symmetric Vertex in a Light Front Approach. FEW-BODY SYSTEMS, v. 59, n. 3, MAY 2018. (15/17234-0, 17/05660-0, 15/16295-5)

MELLO, CLAYTON S.; DE MELO, J. P. B. C.; FREDERICO, T.. Minkowski space pion model inspired by lattice QCD running quark mass. Physics Letters B, v. 766, p. 86-93, MAR 10 2017. (13/26258-4, 15/16295-5)

DE ARAUJO, W. R. B.; DE MELO, J. P. B. C.; TSUSHIMA, K.. Study of the in-medium nucleon electromagnetic form factors using a light-front nucleon wave function combined with the quark-meson coupling model. Nuclear Physics A, v. 970, p. 325-352, FEB 2018. (15/16295-5, 15/17234-0)

DE MELO, J. P. B. C.; TSUSHIMA, K.. rho-Meson properties in medium. Physics Letters B, v. 788, p. 137-146, JAN 10 2019. (15/16295-5, 17/05660-0, 15/17234-0)

DE MELO, J. P. B. C.. Unambiguous extraction of the electromagnetic form factors for spin-1 particles on the light-front. Physics Letters B, v. 788, p. 152-160, JAN 10 2019. (15/16295-5, 17/05660-0)

DE MELO, J. P. B. C.; JI, CHUENG-RYONG; FREDERICO, T.. The rho-meson time-like form factors in sub-leading pQCD. Physics Letters B, v. 763, p. 87-93, DEC 10 2016. (15/16295-5, 13/50749-8)