Výsledky vyhledávání - "Héctor Vucetich"

Thick shell regime in the chameleon two-body problem

Autor: Marcelo Salgado, Susana J. Landau, D. Sudarsky, Héctor Vucetich, Lucila Kraiselburd

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

In a previous paper [Phys. Rev. D 97, 104044 (2018)] we pointed out some shortcomings of the standard approach to chameleon theories consisting in treating the small bodies used to test the weak equivalence principle (WEP) as test particles, whose pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f31e190e59ab59e2315f8f48397b97b
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.99.083516

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Magnetic contributions in Bekenstein type models

Autor: M. E. Mosquera, Lucila Kraiselburd, Florencia Luciana Castillo, Héctor Vucetich

Publikováno v: Physical Review
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP

In this work, we analyze the spatial and time variation of the fine structure constant (α) upon the theoretical framework developed by Bekenstein (Phys. Rev. D 66, 123514 (2002)). We have computed the field ψ related to α at first order of the wea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a32013138188971adcd565ec087a3224
http://repo.scoap3.org/api

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Simplified Thermal Evolution of Proto-hybrid Stars

Autor: Mauro Mariani, Milva Orsaria, Héctor Vucetich

Publikováno v: SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP

We study the possibility of a hadron-quark phase transition in the interior of neutron stars, taking into account different schematic evolutionary stages at finite temperature. Furthermore, we analyze the astrophysical properties of hot and cold hybr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8411b27e9e9d55461f9f27efb3cb1ebc
http://sedici.unlp.edu.ar/handle/10915/123861

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Constant entropy hybrid stars: a first approximation of cooling evolution

Autor: Mauro Mariani, Milva Orsaria, Héctor Vucetich

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP

Aims. We aim to study the possibility of a hadron-quark phase transition in the interior of neutron stars, taking into account different schematic evolutionary stages at finite temperature. We also discuss the strange quark matter stability in the qu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31f5035c60deac7044b060da0813385c

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Constraining the fundamental interactions and couplings with Eötvös experiments

Autor: Héctor Vucetich, Lucila Kraiselburd

Publikováno v: SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP

Upper bounds for the violation of the Weak Equivalence Principle (WEP) by the Fundamental Interactions have been given before. We now recompute the limits on the parameters measuring the strength of the violation with the whole set of high accuracy E

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42c2b0f5140d5bd64fb8ec57ae46dae9
https://doi.org/10.1016/j.physletb.2012.10.016

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EXACT PHILOSOPHY OF SPACETIME

Autor: Héctor Vucetich

Publikováno v: International Journal of Modern Physics D. 20:939-950

Starting from Bunge's (1977) scientific ontology, we expose a materialistic relational theory of space-time, that carries out the program initiated by Leibniz, and provides a protophysical basis consistent with any rigorous formulation of General Rel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d06d4a8debb3af4addf5f1bfd11a416
https://doi.org/10.1142/s0218271811019190

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Quantum corrections to Lorentz invariance violating theories: Fine-tuning problem

Autor: P.M. Crichigno, Héctor Vucetich

Publikováno v: Physics Letters B. 651:313-318

It is of general agreement that a quantum gravity theory will most probably mean a breakdown of the standard structure of space-time at the Planck scale. This has motivated the study of Planck-scale Lorentz Invariance Violating (LIV) theories and the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2fb4efe4dae26e92a52eb9d963892922
https://doi.org/10.1016/j.physletb.2007.06.025

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Equivalence Principle in Chameleon Models

Autor: Susana J. Landau, Héctor Vucetich, D. Sudarsky, Marcelo Salgado, Lucila Kraiselburd

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

Most theories that predict time and/or space variation of fundamental constants also predict violations of the weak equivalence principle (WEP). In 2004 Khoury and Weltman proposed the so called chameleon field arguing that it could help avoiding exp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f2a8ace76d3d49cc63abcf6b424de72
http://arxiv.org/abs/1511.06307

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Scalar resonances in axially symmetric spacetimes

Autor: Héctor Vucetich, Ignacio F. Ranea-Sandoval

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

We study properties of resonant solutions to the scalar wave equation in several axially symmetric spacetimes. We prove that nonaxial resonant modes do not exist neither in the Lanczos dust cylinder, the extreme (2 + 1) dimensional Bañados-Taitelboi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be6c362434714a211af1ffede7283578
https://www.worldscientific.com/doi/abs/10.1142/S0218271815500376

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Primordial Nucleosynthesis with Varying Fundamental Constants: A Semianalytical Approach

Autor: Susana J. Landau, M. E. Mosquera, Héctor Vucetich

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
Astrophys. J. 2006;637(1):28-52
Biblioteca Digital (UBA-FCEN)
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN

Using the semi-analytic method proposed by Esmaizaldeh and coworkers we calculate the abundances of the light elements produced during primordial nucleosynthesis assuming that the gauge coupling constants of the fundamental interactions may vary. We

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be69251bb076afdbd6fafd6802c7d924
https://doi.org/10.1086/431417

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