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pro vyhledávání: '"Trotti, A."'
In the past decades, a remarkable amount of research has been carried out regarding fast solvers for large linear systems resulting from various discretizations of fractional differential equations (FDEs). In the current work, we focus on multigrid m
Externí odkaz:
http://arxiv.org/abs/2403.16352
Autor:
Trotti, Enrico
The scalar glueball, the lightest state in the gluonic Yang-Mills (YM) sector of QCD, is stable in that framework. The scattering of two scalar glueballs is therefore a well defined process in YM, which can be studied with the tools of quantum field
Externí odkaz:
http://arxiv.org/abs/2312.14822
We propose to train neural networks (NNs) using a novel variant of the ``Additively Preconditioned Trust-region Strategy'' (APTS). The proposed method is based on a parallelizable additive domain decomposition approach applied to the neural network's
Externí odkaz:
http://arxiv.org/abs/2312.13677
Autor:
Trotti, Enrico, Jafarzade, Shahriyar
In this note, we present our recent analyses of the thermodynamic properties of the glueball resonance gas. We observe that the dominant contribution to the thermodynamic quantities, such as pressure, trace anomaly, and entropy, is coming from the fr
Externí odkaz:
http://arxiv.org/abs/2310.09606
Autor:
Jafarzade, Shahriyar, Trotti, Enrico
We present the three-body decays for the resonances $\pi_{2}(1670)$ and $ \rho_3(1690)$. We use an effective model based on the flavor symmetry and have assumed the Sill distribution for describing the lie-shape of intermediate unstable resonances. T
Externí odkaz:
http://arxiv.org/abs/2309.16740
Autor:
Trotti, Ken
In this work we develop a novel domain splitting strategy for the solution of partial differential equations. Focusing on a uniform discretization of the $d$-dimensional advection-diffusion equation, our proposal is a two-level algorithm that merges
Externí odkaz:
http://arxiv.org/abs/2303.01163
We study the thermodynamic properties -- pressure, entropy and trace anomaly -- of a gas of glueballs that includes the glueball states obtained by various lattice simulations. We show that this model, called Glueball Resonance Gas (GRG) approach, de
Externí odkaz:
http://arxiv.org/abs/2212.03272
Autor:
Trotti, Enrico
We investigate the scattering of two scalar glueballs in pure YM theory, using the well known dilaton potential. We perform the calculations considering a glueball mass of about $m_G \approx 1.7$ GeV, as predicted by lattice QCD. We begin with the tr
Externí odkaz:
http://arxiv.org/abs/2211.12253
We consider the numerical solution of time-dependent space tempered fractional diffusion equations. The use of Crank-Nicolson in time and of second-order accurate tempered weighted and shifted Gr\"unwald difference in space leads to dense (multilevel
Externí odkaz:
http://arxiv.org/abs/2210.05031
It is known that the solution of a conservative steady-state two-sided fractional diffusion problem can exhibit singularities near the boundaries. As consequence of this, and due to the conservative nature of the problem, we adopt a finite volume ele
Externí odkaz:
http://arxiv.org/abs/2209.08841