69 research outputs found
Inflationary phase in Generalized Brans-Dicke theory
We find a solution for exponential inflation in a Brans-Dicke generalized
model, where the coupling "constant " is variable. While in General Relativity
the equation of state is p is equal to minus rho, here we find p proportional
to rho, where the proportionality constant is smaller than -2/3. The negativity
of cosmic pressure implies acceleration of the expansion, even with lambda < 0
>.Comment: International Journal of Theoretical Physics, to be publishe
Evidence of fractal structures in hadrons
This study focuses on the presence of (multi)fractal structures in confined
hadronic matter through the momentum distributions of mesons produced in
proton-proton collisions between 23 GeV and 63 GeV. The analysis demonstrates
that the -exponential behaviour of the particle momentum distributions is
consistent with fractal characteristics, exhibiting fractal structures in
confined hadronic matter with features similar to those observed in the
deconfined quark-gluon plasma (QGP) regime. Furthermore, the systematic
analysis of meson production in hadronic collisions at energies below 1 TeV
suggests that specific fractal parameters are universal, independently of
confinement or deconfinement, while others may be influenced by the quark
content of the produced meson. These results pave the way for further research
exploring the implications of fractal structures on various physical
distributions and offer insights into the nature of the phase transition
between confined and deconfined regimes.Comment: 23 pages, 11 figures, supplementary materia
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