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pro vyhledávání: '"Campos, S P"'
Autor:
Campos, S. D., Longaresi, R. H.
In this work, we explore the thermodynamics of black holes using the Gouy-Stodola theorem, traditionally applied to mechanical systems relating entropy production to the difference between reversible and irreversible work. We model black holes as gra
Externí odkaz:
http://arxiv.org/abs/2409.02694
Autor:
Campos, S. D.
In the present work, one analyzes two systems trying to obtain physical conditions where some properties attributed to negative mass can be mimicked by positive mass particles. The first one is the well-known 1/2-spin system described by the Dirac eq
Externí odkaz:
http://arxiv.org/abs/2405.12366
Autor:
Campos, S. D.
This work examines some aspects related to the existence of negative mass. The requirement for the partition function to converge leads to two distinct approaches. Initially, convergence is achieved by assuming a negative absolute temperature, which
Externí odkaz:
http://arxiv.org/abs/2307.14369
Autor:
Longaresi, R. H., Campos, S. D.
We propose to apply the entropy generation $(\dot S_{gen}$) concept to a mechanical system: the well-known simple pendulum. When considering the ideal case, where only conservative forces act on the system, one has $\dot S_{gen}=0$, and the entropy v
Externí odkaz:
http://arxiv.org/abs/2206.09715
Autor:
Longaresi, R. H., Campos, S. D.
In this work, we use the Gouy-Stodola theorem to calculate the entropy production rate in the inflationary epoch of the universe. This theorem allows us the simple calculation of entropy and entropy production rate occasioned by the decaying of the i
Externí odkaz:
http://arxiv.org/abs/2206.04155
Autor:
Campos, S. D., Okorokov, V. A.
Publikováno v:
Chin. Phys. C 46, 083105, 2022
In this paper, one presents some results concerning the behavior of the total cross section and $\rho$-parameter at asymptotic energies in proton-proton ($pp$) and antiproton-proton ($\bar{p}p$) collisions. For this intent, we consider three of the m
Externí odkaz:
http://arxiv.org/abs/2202.11648
Chiral Symmetry Restoration using the Running Coupling Constant from the Light-Front Approach to QCD
Autor:
Campos, S. D.
In this work, the distance between a quark-antiquark pair is analyzed through both the confinement potential as well as the hadronic total cross section. Using the Helmholtz free energy, entropy is calculated near the minimum of the total cross secti
Externí odkaz:
http://arxiv.org/abs/2105.11254
Autor:
Campos, S. D.
Publikováno v:
Int. J. Mod. Phys. A36, 2150084 (2021)
In this paper, one uses a damped potential to present a description of the running coupling constant of QCD in the confinement phase. Based on a phenomenological perspective for the Debye screening length, one compares the running coupling obtained h
Externí odkaz:
http://arxiv.org/abs/2103.06642
Autor:
Campos, S. D.
Based on the Pomeranchuk theorem, one constructs the $\delta(s)$ parameter to measure the difference between experimental data for the particle-particle and particle-antiparticle total cross section at the same energy. The experimental data for the p
Externí odkaz:
http://arxiv.org/abs/2006.13885
Autor:
Campos, S. D., Amarante, A. M.
Publikováno v:
Int. J. Mod. Phys. A35, 2050095 (2020)
In this paper, one discusses the effects of the Tsallis entropy on the radial pressure distribution in the proton. Using a damped confinement potential the pressure distribution is obtained from the Tsallis entropy approach, being the entropic-index
Externí odkaz:
http://arxiv.org/abs/2006.00519