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pro vyhledávání: '"A, Toniato"'
A Newtonian-like theory inspired by the Brans-Dicke gravitational Lagrangian has been recently proposed in Ref. arXiv:2009.04434(v4). We propose here a new variant of this theory such that the usual Newtonian second law is preserved. The cosmological
Externí odkaz:
http://arxiv.org/abs/2409.01468
We generalize the potential reconstruction method to set up a dynamical Einstein-Born-Infeld-dilaton model, which we then use to study holographic quarkonium melting in an external magnetic field. The non-linear nature of the model allows to couple t
Externí odkaz:
http://arxiv.org/abs/2408.14813
Autor:
Novello, Mario, Toniato, Júnior D.
In the general relativity theory the basic ingredient to describe gravity is the geometry, which interacts with all forms of matter and energy, and as such, the metric could be interpreted as a true physical quantity. However the metric is not matter
Externí odkaz:
http://arxiv.org/abs/2402.16163
Publikováno v:
Phys. Rev. D 109, 104068 (2024)
We performed a post-Newtonian analysis of the regularized four-dimensional Einstein-Gauss-Bonnet gravitational theory (4D-EGB). The resulting metric differs from the classical parametrized post-Newtonian (PPN) formalism in that a new gravitational po
Externí odkaz:
http://arxiv.org/abs/2402.13951
Publikováno v:
Eur. Phys. J. Plus 138, 1084 (2023)
A Newtonian-like theory inspired by the Brans-Dicke gravitational Lagrangian has been recently proposed in Ref. arXiv:2009.04434(v4). This work demonstrates that the modified gravitational force acting on a test particle is analogous to that derived
Externí odkaz:
http://arxiv.org/abs/2308.15497
Publikováno v:
Phys. Rev. D 109, 044045 (2024)
Massive Brans-Dicke (BD) theory is among the simplest general relativity extensions. It is commonly found as the weak-field limit of other gravitational theories. Here we do a detailed post-Newtonian analysis of massive BD theories. We start by expan
Externí odkaz:
http://arxiv.org/abs/2307.11883
Publikováno v:
Int. J. Geom. Methods Mod. Phys. 2450028 (2023)
Palatini $f(R)$ gravity is probably the simplest extension of general relativity (GR) and the simplest realization of a metric-affine theory. It has the same number of degrees of freedom as GR and, in vacuum, it is straightforwardly mapped into GR wi
Externí odkaz:
http://arxiv.org/abs/2306.04475
Publikováno v:
PoS(LATTICE2021)172
We present results for the photon emission rate determined from the transverse channel vector correlator at fixed spatial momentum using two flavors of dynamical Wilson fermions at $T\sim$250 MeV. We estimate the transverse channel spectral function
Externí odkaz:
http://arxiv.org/abs/2112.00563
The photon emissivity of quark-gluon plasma probes the interactions in the medium and differs qualitatively between a weakly coupled and a strongly coupled plasma in the soft-photon regime. The photon emissivity is given by the product of kinematic f
Externí odkaz:
http://arxiv.org/abs/2112.00450
Publikováno v:
PoS(LATTICE2021)572
We propose a method to help control cutoff effects in the short-distance contribution to integrated correlation functions, such as the hadronic vacuum polarization (HVP), using the corresponding screening correlators computed at finite temperature. T
Externí odkaz:
http://arxiv.org/abs/2111.07948