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Autor Dobado González, Antonio |
Documentos disponibles escritos por este autor (124)
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Ruiz Cembranos, José Alberto ; Cruz Dombriz, Álvaro de la ; Dobado González, Antonio ; López Maroto, Antonio | IOP publishing ltd | 2008-10One of the most striking features found in the cosmic microwave background data is the presence of an anomalous cold spot (CS) in the temperature maps made by the Wilkinson Microwave Anisotropy Probe (WMAP). This CS has been interpreted as the r[...]![]()
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Ruiz Cembranos, José Alberto ; Cruz Dombriz, Álvaro de la ; Dobado González, Antonio ; López Maroto, Antonio | IOP publishing ltd | 2008-10One of the most striking features found in the cosmic microwave background data is the presence of an anomalous cold spot (CS) in the temperature maps made by the Wilkinson Microwave Anisotropy Probe (WMAP). This CS has been interpreted as the r[...]![]()
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Dobado González, Antonio ; Herrero, M. J. ; Pelaez, J.H. ; Morales, E.R. ; Urdiales, M.T. | Elsevier Science BV | 1995-06-15In the present work we study the predictions for WZ and ZZ production at the LHC with the Electroweak Chiral Lagrangian (EChL) approach. Our analysis will be focused on the less favored case from the experimental point of view, in which the pred[...]![]()
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Llanes Estrada, Felipe José ; Dobado González, Antonio ; Delgado López, Rafael | IOP publishing ltd | 2014-02The claimed finding of a light Higgs boson makes the minimal Standard Model unitary. Yet, we recall that the general low-energy dynamics for the minimal electroweak symmetry breaking sector with three Goldstone bosons and one light scalar is not[...]![]()
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Alcazar, J. ; Ruiz Cembranos, José Alberto ; Dobado González, Antonio ; López Maroto, Antonio | Amer Physical Soc | 2003-04In the context of the brane-world scenarios with compactified large extra dimensions, we study the production of the possible massive brane oscillations (branons) in electron-positron colliders. We compute their contribution to the electroweak g[...]![]()
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Dobado González, Antonio ; Llanes Estrada, Felipe José ; Torres Rincón, Juan M. | American Physical Society | 2009-12We reexamine the possibility of employing the viscosity over entropy density ratio as a diagnostic tool to identify a Phase transition in hadron physics to the strongly coupled quark-gluon plasma and other circumstances where direct measurement [...]![]()
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In this work we calculate the low-energy effective action for gravity with torsion, obtained after the integration of scalar and fermionic matter fields, using the local momentum representation based on the Riemann normal coordinates expansion. [...]![]()
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By the use of a simple phenomenological string model, the energy lost by the top quark through nonperturbative fragmentation effects before its weak decay is computed. This energy lost is in first approximation proportional to the rate between t[...]![]()
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In this work we present the results of a complete calculation of the gamma gamma --> pi(0) pi(0) amplitude to leading order in the large N approximation (N being the number of Goldstone bosons) up to order m(pi)(2)/F-2, The amplitude turns to b[...]![]()
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In SU(5)/SO(5) little Higgs models radiative corrections give rise to SU(2)(L)xU(1)(Y) symmetry breaking. In this work we start a program for a detailed determination of the relevant terms of the effective Higgs potential by computing the contri[...]![]()
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We develop an alternative formulation of the symmetry breaking sector of the Standard Model as a gauged non-linear sigma model (NLSM) following the philosophy of the Chiral lagrangian approach, which is the only compatible with all the experimen[...]![]()
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In this letter we show how it is possible to obtain the large N(f) limit of chiral perturbation theory (chi-PT) in the chiral limit. In particular, we compute explicitly the Nambu-Goldstone boson (NGB) elastic scattering amplitude to leading ord[...]![]()
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Albareti, F. D. ; Ruiz Cembranos, José Alberto ; Cruz Dombriz, Álvaro de la ; Dobado González, Antonio | IOP publishing ltd | 2013-07Raychaudhuri equation is found provided that particular energy conditions are assumed and regardless the considered solution of the Einstein's equations. This fact is usually interpreted as a manifestation of the attractive character of gravity.[...]![]()
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In the near future, the DIRAC collaboration will measure pi pi scattering lengths with great precision. Those measurements are likely to shed some light on the problem of the size of the chiral [0\(q) over bar q\0] condensate. Although it is usu[...]![]()
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A computation of the quotient of shear viscosity and entropy density, or the Kovtun, Son and Starinets (KSS) number eta/s, is performed in the non-relativistic and classical regime, first in chiral perturbation theory, and then in the SO(g + 1)I[...]![]()
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Alvarez Estrada, R F ; Dobado González, Antonio ; Gómez Nicola, Ángel | Elsevier Science BV | 1993-12-23We discuss the finite temperature extension of the anomalous Wess-Zumino-Witten lagrangian. The finite temperature S1 x S3 compactification makes a structure in disconnected sectors, corresponding to different baryon numbers appear naturally. Th[...]![]()
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Alvarez Estrada, R F ; Dobado González, Antonio ; Gómez Nicola, Ángel | Elsevier Science BV | 1994-04-07We analyze the finite temperature (T) extension of the Wess-Zumino-Witten functional, discussed in a previous work, to one loop in chiral perturbation theory. As a phenomenological application, we calculate finite temperature corrections to the [...]![]()
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Llanes Estrada, Felipe José ; Delgado López, Rafael ; Dobado González, Antonio | Springer | 2014-02-27By including the recently discovered Higgs-like scalar phi in the Electroweak Chiral Lagrangian, and using the Equivalence Theorem, we carry out the complete one-loop computation of the elastic scattering amplitude for the longitudinal component[...]![]()
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In this paper we show how the nonlocal effective action for gravity, obtained after integrating out the matter fields, can be used to compute particle production and spectra for different space-time metrics. Applying this technique to several ex[...]![]()
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Ruiz Cembranos, José Alberto ; Dobado González, Antonio ; López Maroto, Antonio | American Institute of Physics | 2003The recent proposal of theories with compactified large extra dimensions is reviewed. We pay especial attention to brane world models with low tension where the only relevant degrees of freedom at low energies are the Standard Model (SM) particl[...]![]()
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Ruiz Cembranos, José Alberto ; Cruz Dombriz, Álvaro de la ; Dobado González, Antonio ; Lineros, R. ; López Maroto, Antonio | Amer Inst Physics | 2011If the present dark matter (DM) in the Universe annihilates into Standard Model (SM) particles, it must contribute to the gamma ray fluxes that are detected on the Earth. The magnitude of such contribution depends on the particular DM candidate,[...]![]()
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Ruiz Cembranos, José Alberto ; Cruz Dombriz, Álvaro de la ; Dobado González, Antonio ; Lineros, R.A. ; López Maroto, Antonio | Amer Physical Soc | 2011-04-11If the present dark matter in the Universe annihilates into standard model particles, it must contribute to the fluxes of cosmic rays that are detected on the Earth and, in particular, to the observed gamma-ray fluxes. The magnitude of such a co[...]![]()
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By using chiral perturbation theory and the Uehling-Uhlenbeck equation we compute the viscosity of a pion gas, in the low temperature and low density regime, in terms of the temperature and the pion fugacity. The viscosity turns out to be propor[...]![]()
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We compute the large N effective action of the O(N + 1)/O(N) nonlinear a model including the effect of the pion mass to order m(pi)(2)/f(pi)(2). This action is more involved than the one corresponding to rr the chiral limit not only due to the p[...]![]()
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In this work we use the recently proposed large-N limit of chiral perturbation theory at the leading order and in the chiral limit, to fit the pion scattering. We compute the effective action for pions in this approximation which is non-local. F[...]![]()
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Delgado López, Rafael ; Dobado González, Antonio ; Llanes Estrada, Felipe José | American Physical Society | 2015-06-04We propose and theoretically study a possible new resonance caused by strong coupling between the Higgs-Higgs and the W_LW_L (Z_L Z_L) scattering channels, without regard to the intensity of the elastic interaction in either channel at low energ[...]![]()
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In this letter we provide a simple explanation of the recent finding of anisotropy in electromagnetic (EM) propagation claimed by Nodland and Ralston. We consider, as a possible origin of such effect, the effective coupling between EM fields and[...]![]()
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Dobado González, Antonio ; Guo, Feng-Kuo ; Llanes Estrada, Felipe José | IOP publishing ltd | 2015-12-01We are exploring a generic strongly-interacting Electroweak Symmetry Breaking Sector (EWSBS) with the low-energy effective field theory for the four experimentally known particles (W_L^±, Z_L, h) and its dispersion-relation based unitary extensi[...]![]()
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Dobado González, Antonio ; Guo, Feng-Kuo ; Llanes Estrada, Felipe José | IOP publishing ltd | 2015-12-01We are exploring a generic strongly-interacting Electroweak Symmetry Breaking Sector (EWSBS) with the low-energy effectie field theory for the four experimentally known particles (W^(±)_(L), Z_(L), h) and its dispersion-relation based unitary ex[...]![]()
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Delgado López, Rafael ; Dobado González, Antonio ; Espriu, D. ; García García, C. ; Herrero, M.J. ; Marcano, X. ; Sanz Cillero, Juan José | Springer | 2017-11-16In the present work we study the production of vector resonances at the LHC by means of the vector boson scattering W Z ? W Z and explore the sensitivities to these resonances for the expected future LHC luminosities. We are assuming that these [...]![]()
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Dobado González, Antonio ; Tabares Cheluci, Lourdes ; Peñaranda, Siannah ; Rodríguez Laguna, Javier | Springer | 2010-04In this work we compute the radiative corrections to the Higgs mass and the Higgs quartic couplings coming from the Higgs sector itself and the scalar fields phi in the Littlest Higgs (LH) model. The restrictions that the new contributions set o[...]![]()
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Dobado González, Antonio ; Llanes Estrada, Felipe José ; Sanz Cillero, Juan José | Springer | 2018-03-26We examine the production of W h and Zh pairs at the LHC in the context of a Strongly Interacting Symmetry Breaking Sector of the Standard Model. Our description is based on a non-linear Higgs Effective Theory, including only the Standard Model [...]![]()
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Dobado González, Antonio ; Herrero, M. J. ; Hollik, W. ; Peñaranda , Siannah | American Physical Society | 2002-11-01We investigate the decoupling properties of the Higgs-sector-induced one-loop corrections in the lightest Higgs-boson self-couplings, in the framework of the minimal supersymmetric standard model (MSSM). The renormalized n-point vertex functions[...]![]()
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Llanes Estrada, Felipe José ; Dobado González, Antonio ; Torres Rincón, Juan M. | American Physical Society | 2013-09-12We explore the viscosities of a photon gas by means of the Euler-Heisenberg effective theory and quantum electrodynamics at zero electron chemical potential. We find parametric estimates that show a very large shear viscosity and an extremely sm[...]![]()
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Manuel, Cristina ; Dobado González, Antonio ; Llanes Estrada, Felipe José | Int School Advanced Studies | 2005-09We compute the mean free path and shear viscosity in the color-flavor locked (CFL) phase of dense quark matter at low temperature T, when the contributions of mesons, quarks and gluons to the transport coefficients are Boltzmann suppressed. CFL [...]![]()
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We consider the minimal low-energy action for gravity up to six derivatives which is renormalizable at the two-loop level modulo higher derivative corrections. Then we study the classical solutions corresponding to the Schwarzschild and the Robe[...]![]()
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Ruiz Cembranos, José Alberto ; Dobado González, Antonio ; López Maroto, Antonio | IOP publishing ltd | 2007-06-22In this work, we will review the main properties of braneworld models with low tension. Starting from very general principles, it is possible to obtain an effective action for the relevant degrees of freedom at low energies (branons). Using the [...]![]()
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Using the Fujikawa and the heat-kernel methods we make a complete and detailed computation of the global, gauge, and gravitational anomalies in the standard model defined on a curved space-time with torsion. We find new contributions coming from[...]![]()
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This article presents a number of technical tools and results that may be instrumental to discern the nature of the Higgs particle. In scenarios where an additional strongly interacting sector is present in the electroweak theory, resulting in a[...]![]()
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Delgado López, Rafael ; Dobado González, Antonio ; Llanes Estrada, Felipe José | American Institute of Physics (AIP) | 2016The apparent finding of a 125 GeV light Higgs boson would close the minimal Standard Model (SM), that is weakly interacting. This is an exceptional feature not generally true if new physics exists beyond the mass gap found at the LHC up to 700 G[...]![]()
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Dobado González, Antonio ; Delgado López, Rafael ; Llanes Estrada, Felipe José | American Institute of Physics | 2014The apparent finding of a 125-GeV light Higgs boson closes unitarity of the minimal Standard Model (SM), that is weakly interacting: this is an exceptional feature not generally true if new physics exists beyond the mass gap found at the LHC up [...]![]()
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Delgado López, Rafael ; Dobado González, Antonio ; Llanes Estrada, Felipe José | Elsevier Sciende BV | 2016-04Recently, a new boson h has been discovered at the LHC which, so far, is compatible with the properties of the SM Higgs. However, the SM is not the most general low-energy dynamics for the minimal electroweak symmetry breaking sector with three [...]![]()
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If the symmetry-breaking sector of the standard model is strongly interacting, the low-energy dynamics of the longitudinal components of the weak bosons can be described by a nonlinear-sigma-model with two free parameters. For a large range of t[...]