Zobrazeno 1 - 10
of 81
pro vyhledávání: '"J. P. B. C de Melo"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 2, Pp 1-33 (2019)
Abstract The Dyson–Schwinger quark equation is solved for the quark-gluon vertex using the most recent lattice data available in the Landau gauge for the quark, gluon and ghost propagators, the full set of longitudinal tensor structures in the Ball
Externí odkaz:
https://doaj.org/article/5d1b6468c9a74b2e8137f5a2b6b13829
The pion structure in Minkowski space is explored using the Nakanishi integral representation. A general framework is developed for the pion Bethe-Salpeter amplitude based on the Kallen-Lehmann representation of the dressed quarks with an ansatz for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38397ec4d88fdb579ad1b44fc5c2d78f
http://arxiv.org/abs/2208.03845
http://arxiv.org/abs/2208.03845
Publikováno v:
Physical Review
The electroweak properties of light and charmed D and Ds pseudoscalar mesons are investigated within a unified covariant constituent quark model. The quark-antiquark-meson vertices are assumed to have a symmetric form by the exchange of quark momenta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e477957630483ba2c8a956d618b924b
https://doi.org/10.1103/physrevd.104.096020
https://doi.org/10.1103/physrevd.104.096020
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 2, Pp 1-33 (2019)
European Physical Journal
European Physical Journal
The Dyson-Schwinger quark equation is solved for the quark-gluon vertex using the most recent lattice data available in the Landau gauge for the quark, gluon and ghost propagators, the full set of longitudinal tensor structures in the Ball-Chiu verte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6198cffbec8fc7ae2231adf1a3e02122
http://link.springer.com/article/10.1140/epjc/s10052-019-6617-7
http://link.springer.com/article/10.1140/epjc/s10052-019-6617-7
Publikováno v:
Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019).
We study the pion electromagnetic half-off-shell form factors $F_1$ and $F_2$ using an exactly solvable manifestly covariant model of a $(3+1)$ dimensional fermion field theory. The model provides a three-dimensional imaging of $F_1$ and $F_2$ as a f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9c3f5fc96a906ea07269442c2c9abb3
https://doi.org/10.22323/1.374.0035
https://doi.org/10.22323/1.374.0035
Autor:
J. P. B. C. de Melo
Publikováno v:
Physics Letters B, Vol 788, Iss, Pp 152-160 (2019)
Physics Letters
Physics Letters
The electromagnetic form factors of a composite vector particle within the light-front formulation of the Mandelstam formula is investigated. In order to extract the form factors from the matrix elements of the plus component of the current in the Dr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0c65b1850f353d5c212509931be20f1
http://www.sciencedirect.com/science/article/pii/S0370269318308372
http://www.sciencedirect.com/science/article/pii/S0370269318308372
Publikováno v:
Physics Letters
Physics Letters B, Vol 803, Iss, Pp-(2020)
Physics Letters B, Vol 803, Iss, Pp-(2020)
We propose a medium-modified holographic-hadron dynamics suitable for the study of symmetric nuclear matter, with a key property of a simple law for the evolution of the five dimensional mass with the scalar background field. We show that the model s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ccb97fea70e81a25d3bf0dcfde88d25
http://repo.scoap3.org/api
http://repo.scoap3.org/api
Publikováno v:
Physics Letters B, Vol 784, Iss, Pp 255-260 (2018)
Physics Letters
Physics Letters
In this paper we present the mass matrices and mass eigenstates for the CP-even neutral scalars in the minimal 331 model (m331) and its self-interactions, showing that the m331 automatically reproduces the Higgs potential of the Standard Model. We al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7339276696be0a7e2b7af0fe1680619
https://doi.org/10.1016/j.physletb.2018.07.056
https://doi.org/10.1016/j.physletb.2018.07.056
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 7, Pp 1-7 (2018)
European Physical Journal
European Physical Journal
The soft gluon limit of the longitudinal part of the quark-gluon vertex is studied by resorting to non-perturbative approaches to Quantum Chromodynamics (QCD). Based on a Slavnov-Taylor identity (STI), the longitudinal form factors is expressed in te
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::787ce870ed82e3d12a85d1f93e553b00
http://link.springer.com/article/10.1140/epjc/s10052-018-6037-0
http://link.springer.com/article/10.1140/epjc/s10052-018-6037-0
Publikováno v:
Nuclear Physics A. 970:325-352
We study the nucleon electromagnetic (EM) form factors in symmetric nuclear matter as well as in vacuum within a light-front approach using the in-medium inputs calculated by the quark-meson coupling model. The same in-medium quark properties are use
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8eb151932e5ba6e6c14201c5882352c
https://doi.org/10.1016/j.nuclphysa.2017.12.005
https://doi.org/10.1016/j.nuclphysa.2017.12.005