Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Krein, Gastao"'
The leading Fock state light-front wave functions of heavy quarkonia and $D$ and $B$ mesons are obtained from the projections of their Bethe-Salpeter wave functions on the light front. We compute therefrom their leading-twist time-reversal even trans
Externí odkaz:
http://arxiv.org/abs/2409.01441
One of the remarkable differences between renormalizable quantum gravity with four-derivative action and its superrenormalizable polynomial generalizations is that the latter admit a more sophisticated particle mass spectrum. Already in the simplest
Externí odkaz:
http://arxiv.org/abs/2408.16514
Autor:
Azeredo, Francisco X., Duarte, Dyana C., Farias, Ricardo L. S., Krein, Gastão, Ramos, Rudnei O.
Publikováno v:
Phys. Rev. D 110 (2024) 076007
We study the thermodynamics of the Polyakov-Nambu-Jona-Lasinio model considering the effects of an effective chiral chemical potential. We offer a new parametrization of the Polyakov-loop potential depending on temperature and the chiral chemical pot
Externí odkaz:
http://arxiv.org/abs/2406.04900
Autor:
frederico, Tobias, Francisco, Rafael Mendes, Rosa, Dérick dos Santos, Krein, Gastão Inácio, Yamashita, Marcelo Takeshi
We explore the effect of a finite two-body energy in the discrete scale symmetry regime of two heavy bosonic impurities immersed in a light bosonic system. By means of the Born-Oppenheimer approximation in non-integer dimensions $(D)$, we discuss the
Externí odkaz:
http://arxiv.org/abs/2402.10792
Autor:
Pasqualotto, Arthur E. B., Farias, Ricardo L. S., Tavares, William R., Avancini, Sidney S., Krein, Gastão
Publikováno v:
Phys.Rev.D 107 (2023) 9, 096017
The Nambu--Jona-Lasinio model is widely used to study strong-interaction phenomena in vacuum and quark matter. Since the model is nonrenormalizable, one needs to work within a specific regularization scheme to obtain finite results. Here we show that
Externí odkaz:
http://arxiv.org/abs/2301.10721
We show that the Wilsonian formulation of the renormalization group (RG) defines a quantum channel acting on the momentum-space density matrices of a quantum field theory. This information theoretical property of the RG allows us to derive a remarkab
Externí odkaz:
http://arxiv.org/abs/2211.10238
Publikováno v:
Phys. Rev. D 106, 065024 (2022)
The entanglement between momentum modes of a quantum field theory at different scales is not as well studied as its counterpart in real space, despite the natural connection with the Wilsonian idea of integrating out the high-momentum degrees of free
Externí odkaz:
http://arxiv.org/abs/2207.12103
Femtoscopy is a powerful tool that can be used to investigate the space-time dimensions of the region from which the particles are emitted. When applied to high energy collisions this method is sensitive not only to quantum statistics, but also to fi
Externí odkaz:
http://arxiv.org/abs/2110.15455
Autor:
Tavares, William R., Farias, Ricardo L. S., Avancini, Sidney S., Timóteo, Varese S., Pinto, Marcus B., Krein, Gastão
Publikováno v:
Eur. Phys. J. A 57, 278 (2021)
We use a three-flavor Nambu--Jona-Lasinio model to study the thermodynamics of strange quark matter under a strong magnetic field. The model Lagrangian features flavor SU(3) four-quark interactions and six-quark interactions that break the UA(1) symm
Externí odkaz:
http://arxiv.org/abs/2104.11117
Autor:
Costa, C. S. R., Freese, Adam, Cloët, Ian C., El-Bennich, Bruno, Krein, Gastão, Tandy, Peter C.
Publikováno v:
Phys. Rev. C 104, 045201 (2021)
We construct a quark target model (QTM) to incorporate intrinsic glue into effective low-energy models of QCD, which often contain only quark degrees of freedom. This method guarantees the gauge invariance of observables order-by-order in the strong
Externí odkaz:
http://arxiv.org/abs/2103.17163