Albino Hernandez-Galeana

Publications (4)0 Total impact

• Article: Charged lepton and Neutrino masses from a low energy SU(3) flavour symmetry model

  Albino Hernandez-Galeana
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  ABSTRACT: We report a recent study on lepton masses within a beyond standard model with a SU(3) family symmetry model. In this scenario ordinary heavy fermions, top and bottom quarks and tau lepton become massive at tree level from Dirac See-saw mechanisms implemented by the introduction of a new set of $SU(2)_L$ weak singlet vector-like fermions $U,D,E,N$, with $N$ a sterile neutrino. The $N_{L,R}$ sterile neutrinos allow the implementation of a $8\times 8$ general tree level See-saw Majorana neutrino mass matrix with four massless eigenvalues. Hence, light fermions, including light neutrinos, obtain masses from one loop radiative corrections mediated by the massive SU(3) gauge bosons. Recent analysis shows the existence of a space parameter region where the $M_U, M_D,M_E,M_N$ vector-like fermion masses are within a scale of a few TeV's. This BSM model is able to accommodate the known spectrum of quark masses and mixing in a $4\times 4$ non-unitary $V_{CKM}$ as well as the charged lepton masses. We report a preliminary solution for ordinary charged lepton masses $(m_e, m_\mu, m_\tau) = (0.486, 102.7, 1746.17) MeV$ at the $M_Z$ scale, a $M_E \approx 2.6 TeV$ and SU(3) gauge boson masses of $\mathcal{O} (10 TeV)$. A detailed numerical analysis on neutrino masses and mixing is in progress and hopefully shall be reported soon.
  12/2012;
• Source

  Available from: ArXiv

  Article: Predictions for fermion masses and mixing from a low energy SU(3) flavor symmetry model with a Light Sterile Neutrino

  Albino Hernandez-Galeana
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  ABSTRACT: I report low energy results on the study of fermion masses and mixing for quarks and leptons, including neutrinos within a SU(3) flavor symmetry model, where ordinary heavy fermions, top and bottom quarks and tau lepton become massive at tree level from {\bf Dirac See-saw} mechanisms implemented by the introduction a new set of $SU(2)_L$ weak singlet vector-like fermions $U,D,E,N$, with $N$ a sterile neutrino. Light fermions obtain masses from one loop radiative corrections mediated by the massive SU(3) gauge bosons. Recent results shows the existence of a low energy space parameter where this model is able to accommodate the known spectrum of quark masses and mixing in a $4\times 4$ non-unitary $V_{CKM}$ as well as the charged lepton masses. Motivated by the recent LSND and MiniBooNe short-baseline neutrino oscillation experiments we fit for the 3+1 scenario the neutrino squared mass differences $m_2^2 - m_1^2\approx 7.6\times 10^{-5}\;\text{eV}^2$, $m_3^2 - m_2^2\approx 2.43\times 10^{-3} \text{eV}^2$ and $m_4^2 - m_1^2\approx 0.29 \text{eV}^2$. The model predicts the D vector like quark mass in the range $M_D=(350 - 900)GeV$ and horizontal gauge boson masses of few TeV. These low energy predictions are within LHC possibilities. Furthermore, the above scenario enable us to suppress simultaneously the tree level $\Delta F=2$ processes for $K^o-\bar{K^o}$ and $D^o-\bar{D^o}$ meson mixing mediated by these extra horizontal gauge bosons within current experimental bounds.
  11/2011;
• Source

  Available from: ArXiv

  Article: Fermion masses and neutrino mixing in an U(1)_H flavor symmetry model with hierarchical radiative generation for light charged fermion masses

  Albino Hernandez-Galeana
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  ABSTRACT: I report the analysis performed on fermion masses and mixing, including neutrino mixing, within the context of a model with hierarchical radiative mass generation mechanism for light charged fermions, mediated by exotic scalar particles at one and two loops, respectively, meanwhile the neutrinos get Majorana mass terms at tree level through the Yukawa couplings with two SU(2)_L Higgs triplets. All the resulting mass matrices in the model, for the u, d, and e fermion charged sectors, the neutrinos and the exotic scalar particles, are diagonalized in exact analytical form. Quantitative analysis shows that this model is successful to accommodate the hierarchical spectrum of masses and mixing in the quark sector as well as the charged lepton masses. The lepton mixing matrix, V_{PMNS}, is written completely in terms of the neutrino masses m_1, m_2, and m_3. Large lepton mixing for \theta_{12} and \theta_{23} is predicted in the range of values 0.7 \lesssim \sin^22\theta_{12}\lesssim 0.7772 and 0.87 \lesssim \sin^22\theta_{23} \lesssim 0.9023 by using 0.033 \lesssim s_{13}^2 \lesssim 0.04. These values for lepton mixing are consistent with 3 \sigma allowed ranges provided by recent global analysis of neutrino data oscillation. From \Delta m_{\text{sol}}^2 bounds, neutrino masses are predicted in the range of values m_1 \thickapprox (1.706 - 2.494) x 10^{- 3} eV, m_2 \thickapprox (6.675 - 12.56) x 10^{- 3} eV, and m_3 \thickapprox (1.215 - 2.188) x 10^{- 2} eV, respectively. The above allowed lepton mixing leads to the quak-lepton complementary relations \theta_{12}^{CKM} + \theta_{12}^{PMNS} \thickapprox 41.543^{\circ} - 44.066^{\circ} and \theta_{23}^{CKM}+\theta_{23}^{PMNS}\thickapprox 36.835^{\circ} - 38.295^{\circ}.
  11/2007;
• Source

  Available from: arxiv.org

  Article: Radiative generation of light fermion masses in a $SU(3)_H$ horizontal symmetry model

  Albino Hernandez-Galeana
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  ABSTRACT: In a model with a gauge group $SU(3)_H\otimes G_{SM}$, where $SU(3)_H$ is a horizontal symmetry and $G_{SM}=SU(3)_C\otimes SU(2)_L\otimes U(1)_Y$ is the standard model, we propose a radiative mechanism of mass generation mediated by the $SU(3)_H$ gauge bosons for the light fermions, meanwhile the masses of the heaviest family are generated by the implementation of see-saw mechanisms with the introduction of vectorial fermions. Comment: 12 pages, 2 figures; references added, version to be published in Rev. Mex. Fis
  06/2004;