166 results on '"Peinado, E."'
Search Results
2. Coherent elastic neutrino-nucleus scattering: Terrestrial and astrophysical applications
- Author
-
Abdullah, M., Abele, H., Akimov, D., Angloher, G., Aristizabal-Sierra, D., Augier, C., Balantekin, A. B., Balogh, L., Barbeau, P. S., Baudis, L., Baxter, A. L., Beaufort, C., Beaulieu, G., Belov, V., Bento, A., Berge, L., Bernardi, I. A., Billard, J., Bolozdynya, A., Bonhomme, A., Bres, G., Bret, J-. L., Broniatowski, A., Brossard, A., Buck, C., Cadeddu, M., Calvo, M., Canonica, L., Cappella, F., Cardani, L., Casali, N., Cazes, A., Cerulli, R., Chaize, D., Chang, C., Chapellier, M., Chaplinsky, L., Chemin, G., Chen, R., Colantoni, I., Colas, J., Coloma, P., Corcoran, E. C., Crawford, S., Cruciani, A., Fard, A. Dastgheibi, De Jesus, M., de Marcillac, P., De Romeri, V., del Castello, G., del GalloRoccagiovine, M., Delicato, D., Demarteau, M., Deng, Y., Dent, J. B., Denton, P. B., Dering, K., Doblhammer, A., Dordei, F., Dorer, S., Dumoulin, L., Dunford, D., Dutta, B., Erhart, A., Exshaw, O., Ferriol, S., Figueroa-Feliciano, E., Filippini, J. B., Flores, L . J., Formaggio, J. A., Friedl, M., Fuard, S., Gao, F., Garai, A., Garces, E. A., Gascon, J., Gehrlein, J., Gerbier, G., Ghete, V. M., Giomataris, I., Giroux, G., Giuliani, A., Giunti, C., Gorel, P., Goupy, C., Goupy, J., Goy, C., Green, M. P., Gros, M., Guerin, C., Guidi, V., Guillaudin, O., Guy, E., Ha, C., Hauff, D., Hakenmuller, J., Harrington, P. M., Hedges, S., Heine, S. T., Hertel, S., Heusch, M., Hoarau, C., Hoferichter, M., Hoppe, E. W., Hong, Z., Horiuchi, S., Huber, P., Ianigro, J. C., Jachowicz, N., Jericha, E., Jin, Y., Johnston, J. P., Juillard, A., Katsioulas, I., Kazarcev, S., Kaznacheeva, M., Kelly, F., Kelly, K. J., Kim, D., Kinast, A., Klinkenberg, L., Kluck, H., Knights, P., Ko, Y. J., Kosmas, T. S., Kwon, L., Lamblin, J., Lang, R. F., Langenkamper, A., Langrock, S., Lasserre, T., Lattaud, H., Lautridou, P., Lee, H. S., Lenardo, B. G., Lhuillier, D., Li, M., Li, S. C., Li, Y. F., Li, Z., Lindner, M., Liu, J., Loomba, D., Lubashevskiy, A., Machado, P. A. N., Mancuso, M., Maneschg, W., Markoff, D. M., Marnieros, S., Martin, R., Martin, R. D., Mauri, B., Mayer, D. W., Mazzolari, A., Mazzucato, E., Menendez, J., Minet, J., Miranda, O. G., Misiak, D., Mols, J. -P., Monfardini, A., Mounier, F., Muraz, J. F., Neep, T., Neilson, R., Newby, J., Newstead, J. L., Neyrial, H., Ni, K., Nikolopoulos, K., Nones, C., Norcini, D., Pandey, V., O'Brien, P., O'Hare, C. A. J., Oberauer, L., Oliver, W., Olivieri, E., Onillon, A., Oriol, C., Ortmann, T., Owen, R., Palladino, K. J., Papoulias, D. K., Park, J. C., Parno, D. S., Patel, P. K., Pattavina, L., Peinado, E., Perbet, E., Peters, L., Petricca, F., Pinckney, H. D., Piro, M. -C., Ponomarev, D., Poda, D., Potzel, W., Probst, F., Pucci, F., Rarbi, F., Rapp, R., Ray, H., Real, J. -S., Reindl, F., Rich, G. C., Ricol, J. S., Rink, T., Redon, T., Rogly, R., Robert, A., Rothe, J., Rozov, S., Rozova, I., Salagnac, T., Garcia, E. Sanchez, Garcia, G. Sanchez, Sanders, O., Sanglard, V., Santos, D., Sarkis, Y., Savu, V., Savvidis, G., Savvidis, I., Schermer, N., Schieck, J., Schmidt, B., Schonert, S., Scholberg, K., Schwenk, A., Schwertner, C., Scola, L., Shevchik, Ye., Shin, S., Sibille, V., Shoemaker, I. M., Snowden-Ifft, D. P., Soldner, T., Soum, G., Spooner, N. J. C., Stachurska, J., Stodolsky, L., Strauss, R., Strigari, L. E., Stutz, A., Suh, B. D., Suhonen, J., Tabrizi, Z., Takhistov, V., Thompson, A., Tomei, C., Tortola, M., Tripathi, M., Vagneron, L., Valle, J. W. F., Mirbach, K. v., Van De Ponteseele, W., Vignati, M., Vivier, M., Fernandez, F. Vazquez de Sola, Vezzu, F., Vidal, M., Wagner, V., Walker, J. W., Ward, R., Wex, A., Winslow, L., Wong, H. T., Wood, M. H., Xu, J., Yang, L., Yakushev, E., Zampaolo, M., Zettlemoyer, J., Zhang, Y. Y., and Zinatulina, D.
- Subjects
High Energy Physics - Phenomenology ,Astrophysics - High Energy Astrophysical Phenomena ,High Energy Physics - Experiment - Abstract
Coherent elastic neutrino-nucleus scattering (CE$\nu$NS) is a process in which neutrinos scatter on a nucleus which acts as a single particle. Though the total cross section is large by neutrino standards, CE$\nu$NS has long proven difficult to detect, since the deposited energy into the nucleus is $\sim$ keV. In 2017, the COHERENT collaboration announced the detection of CE$\nu$NS using a stopped-pion source with CsI detectors, followed up the detection of CE$\nu$NS using an Ar target. The detection of CE$\nu$NS has spawned a flurry of activities in high-energy physics, inspiring new constraints on beyond the Standard Model (BSM) physics, and new experimental methods. The CE$\nu$NS process has important implications for not only high-energy physics, but also astrophysics, nuclear physics, and beyond. This whitepaper discusses the scientific importance of CE$\nu$NS, highlighting how present experiments such as COHERENT are informing theory, and also how future experiments will provide a wealth of information across the aforementioned fields of physics., Comment: contribution to Snowmasss 2021. Contact authors: P. S. Barbeau, R. Strauss, L. E. Strigari
- Published
- 2022
3. Non-standard neutrino interactions in $U(1)'$ model after COHERENT data
- Author
-
Flores, L. J., Nath, Newton, and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
We explore the potential to prove light extra gauge $Z^\prime$ boson inducing non-standard neutrino interactions (NSIs) in the coherent-elastic neutrino-nucleus scattering (CE$ \nu $NS) experiments. We intend to examine how the latest COHERENT-CsI and CENNS-10 data can constrain this model. A detailed investigation for the upcoming Ge, LAr-1t, and NaI detectors of COHERENT collaboration has also been made. Depending on numerous other constraints coming from oscillation experiments, muon $ (g-2) $, beam-dump experiments, LHCb, and reactor experiment CONUS, we explore the parameter space in $Z^\prime$ boson mass vs coupling constant plane. Moreover, we study the predictions of two-zero textures that are allowed in the concerned model in light of the latest global-fit data., Comment: 29 pages, 4 figures, 8 tables. Included analysis with latest CENNS-10 detector data. Discussion added. Version to appear in JHEP
- Published
- 2020
- Full Text
- View/download PDF
4. Self-interacting neutrino portal dark matter
- Author
-
Lamprea, JM, Peinado, E, Smolenski, S, and Wudka, J
- Subjects
hep-ph - Abstract
We present a realistic, simple and natural model of strongly-interacting darkmatter based on the neutrino-portal paradigm. The strong interactions at smallvelocities are generated by the exchange of dark photons, and produce theobserved core-like DM distribution in galactic centers; this effect could bespoiled by the formation of DM bound states (also due to dark-photon effects),which we avoid by requiring the DM candidates to be light, with masses belowO(10 GeV). The mixing of the dark photon with the Z and ordinary photon isstrongly suppressed by introducing a softly-broken discrete symmetry similar tocharge conjugation, which also ensures that the dark photon life-time is shortenough to avoid restrictions derived form big-bang nucleosynthesis andlarge-scale structure formation. Other constraints are accommodated without theneed of fine tuning, in particular nucleon scattering occurs only at one loop,so direct detection cross sections are naturally suppressed. Neutrino massesare generated through the inverse see saw.
- Published
- 2021
5. Strongly Interacting Neutrino Portal Dark Matter
- Author
-
Lamprea, J. M., Peinado, E., Smolenski, S., and Wudka, J.
- Subjects
High Energy Physics - Phenomenology - Abstract
We present a realistic, simple and natural model of strongly-interacting dark matter based on the neutrino-portal paradigm. The strong interactions at small velocities are generated by the exchange of dark photons, and produce the observed core-like DM distribution in galactic centers; this effect could be spoiled by the formation of DM bound states (also due to dark-photon effects), which we avoid by requiring the DM candidates to be light, with masses below O(10 GeV). The mixing of the dark photon with the Z and ordinary photon is strongly suppressed by introducing a softly-broken discrete symmetry similar to charge conjugation, which also ensures that the dark photon life-time is short enough to avoid restrictions derived form big-bang nucleosynthesis and large-scale structure formation. Other constraints are accommodated without the need of fine tuning, in particular nucleon scattering occurs only at one loop, so direct detection cross sections are naturally suppressed. Neutrino masses are generated through the inverse see saw., Comment: 23 pages, 13 figures
- Published
- 2019
- Full Text
- View/download PDF
6. Simple A4 models for dark matter stability with texture zeros
- Author
-
de la Vega, Leon M. G., Ferro-Hernandez, R., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
In a simple framework which naturally incorporates dark matter stability and neutrino phenomenology, we compute all the possible texture zeros which arise when the non-abelian flavor symmetry A4 is spontaneously broken to Z2. As a result, we obtain four textures with two vanishing matrix elements. Two of such textures predict a zero contribution to the neutrinoless double beta decay effective mass parameter at tree level, and as a one loop bound we get $m_{ee}<8\times 10^{-2}$ meV. These are compatible with the normal ordering for the neutrino masses and the allowed range for the lightest neutrino mass is between $m_{\nu_{min}}\sim3$ meV and $m_{\nu_{max}}\sim8$ meV. Additionally we obtain dark matter stability linked to the way the flavor symmetry is broken, leaving a residual Z2 symmetry, Comment: 5 pages, 1 figure. Minor corrections, some references added, version to match the journal version
- Published
- 2018
- Full Text
- View/download PDF
7. Sistema Integrado de Gestão Educacional do Amazonas: desafios e possibilidades na utilização do módulo Especial
- Author
-
Ana Patricia Peinado e Silva and Ana Patricia Peinado e Silva
- Published
- 2022
8. SeeSaw scale discrete dark matter and two-zero texture Majorana neutrino mass matrices
- Author
-
Lamprea, J. M. and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
In this paper we present a scenario where the stability of dark matter and the phenomenology of neutrinos are related by the spontaneous breaking of a non-Abelian flavor symmetry. In this scenario the breaking is done at the seesaw scale, in such a way that what remains of the flavor symmetry is a Z2 symmetry, which stabilizes the dark matter. We have proposed two models based on this idea, for which we have calculated their neutrino mass matrices achieving two-zero texture in both cases. Accordingly, we have updated this two-zero texture phenomenology finding an interesting correlation between the reactor mixing angle and the sum of the light neutrino masses. We also have a correlation between the lightest neutrino mass and the neutrinoless double beta decay effective mass, obtaining a lower bound for the effective mass within the region of the nearly future experimental sensitivities., Comment: 15 pages, 12 figures, matches published version
- Published
- 2016
- Full Text
- View/download PDF
9. The quest for neutrinoless double beta decay: Pseudo-Dirac, Majorana and sterile neutrinos
- Author
-
Meroni, A. and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
In this paper we analyze the neutrinoless double beta decay predictions in some scenarios with admixture of pseudo-Dirac and Majorana neutrinos in the 3 and 3+1 neutrino frameworks. We found that some of the cases can be falsifiable in near-term and future generations of neutrinoless double beta decay experiments even for the normal neutrino mass hierarchy. In the 3+1 framework we consider the sterile neutrino with a mass of the order of 1 eV. The complementarity between cosmological constraints and the future sensitivity for the next generations of the neutrinoless double beta decay searches is exploited., Comment: 10 pages, 40 figures, added references
- Published
- 2014
- Full Text
- View/download PDF
10. Two-zero Majorana textures in the light of the Planck results
- Author
-
Meloni, D., Meroni, A., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
The recent results of the Planck experiment put a stringent constraint on the sum of the light neutrino masses, m1+m2+m3 < 0.23 eV (95 % CL). On the other hand, two-zero Majorana mass matrix textures predict strong correlations among the atmospheric angle and the sum of the masses. We use the Planck result to show that, for the normal hierarchy case, the texture with vanishing (2,2) and (3,3) elements is ruled out at a high confidence level; in addition, we emphasize that a future measurement of the octant of the atmospheric mixing angle (or the one sigma determination of it based on recent fit to neutrino data) will put severe constraint on the possible structure of the Majorana mass matrix. The implication of the above mentioned correlations for neutrinoless double beta-decay are also discussed, for both normal and inverted orderings., Comment: 9 pages, 8 figures
- Published
- 2014
- Full Text
- View/download PDF
11. Dirac neutrinos from flavor symmetry
- Author
-
Aranda, Alfredo, Bonilla, Cesar, Morisi, S., Peinado, E., and Valle, J. W. F.
- Subjects
High Energy Physics - Phenomenology - Abstract
We present a model where Majorana neutrino mass terms are forbidden by the flavor symmetry group Delta(27). Neutrinos are Dirac fermions and their masses arise in the same way as that of the charged fermions, due to very small Yukawa couplings. The model fits current neutrino oscillation data and correlates the octant of the atmospheric angle with the magnitude of the lightest neutrino mass, with maximal mixing excluded for any neutrino mass, Comment: 6 pages, 2 figures, references added, discussion of FCNC processes added. Version to appear in PRD
- Published
- 2013
- Full Text
- View/download PDF
12. Quark-Lepton Mass Relation and CKM mixing in an A4 Extension of the Minimal Supersymmetric Standard Model
- Author
-
Morisi, S., Nebot, M., Patel, Ketan M., Peinado, E., and Valle, J. W. F.
- Subjects
High Energy Physics - Phenomenology - Abstract
An interesting mass relation between down type quarks and charged leptons has been recently predicted within a supersymmetric SU(3)_c \times SU(2)_L \times U(1)_Y model based on the A4 flavor symmetry. Here we propose a simple extension which provides an adequate full description of the quark sector. By adding a pair of vector-like up-quarks we show how the CKM entries Vub, Vcb, Vtd and Vts arise from deviations of the unitarity. We perform an analysis including the most relevant observables in the quark sector, such as oscillations and rare decays of Kaons, Bd and Bs mesons. In the lepton sector, model predicts an inverted hierarchy for the neutrino masses leading to a potentially observable rate of neutrinoless double beta decay., Comment: 10 pages, 4 figures, matches version accepted for publication in Phys. Rev. D
- Published
- 2013
- Full Text
- View/download PDF
13. Quark-Lepton Mass Relation in a Realistic A4 Extension of the Standard Model
- Author
-
King, S. F., Morisi, S., Peinado, E., and Valle, J. W. F.
- Subjects
High Energy Physics - Phenomenology - Abstract
We propose a realistic A4 extension of the Standard Model involving a particular quark-lepton mass relation, namely that the ratio of the third family mass to the geometric mean of the first and second family masses are equal for down-type quarks and charged leptons. This relation, which is approximately renormalization group invariant, is usually regarded as arising from the Georgi-Jarlskog relations, but in the present model there is no unification group or supersymmetry. In the neutrino sector we propose a simple modification of the so called Zee-Wolfenstein mass matrix pattern which allows an acceptable reactor angle along with a deviation of the atmospheric and solar angles from their bi-maximal values. Quark masses, mixing angles and CP violation are well described by a numerical fit., Comment: 9 pages, 3 figures, version published in Phys. Lett. B
- Published
- 2013
- Full Text
- View/download PDF
14. Flavor origin of R-parity
- Author
-
Morisi, S., Peinado, E., and Vicente, A.
- Subjects
High Energy Physics - Phenomenology ,High Energy Physics - Theory - Abstract
Proton stability is guaranteed in the MSSM by assuming a discrete symmetry, R-parity. However, there are additional R-parity conserving higher dimensional operators which violate lepton and baryon numbers and induce fast proton decay. Here we study the possibility that all renormalizable, as well as the most dangerous non-renormalizable, R-parity violating operators are forbidden by a flavor symmetry, providing a common origin for fermion mixing and proton and dark matter stability. We propose a specific model based on the Delta(27) discrete symmetry., Comment: 8 pages, 1 figure. v2: matches published version
- Published
- 2012
- Full Text
- View/download PDF
15. Discrete dark matter mechanism
- Author
-
Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
We present the Discrete Dark Matter mechanism (DDM) which consist on the stability of the dark matter from a spontaneous breaking of a flavor symmetry group into one of its subgroups. Here we present the inclusion of the quarks on this mechanism promoting the quarks to transform non-trivial under the flavor group., Comment: Contribution to the Proceedings of PASCOS2012 conference, 6 pages, 3 figures
- Published
- 2012
16. Proceedings of the 2nd Workshop on Flavor Symmetries and Consequences in Accelerators and Cosmology (FLASY12)
- Author
-
Varzielas, I. de Medeiros, Hambrock, C., Hiller, G., Jung, M., Leser, P., Päs, H., Schacht, S., Aoki, M., Barry, J., Bhattacharyya, G., Blankenburg, G., Buras, A. J., Calibbi, L., Covi, L., Das, D., Deppisch, F. F., Descotes-Genon, S., Ding, G. -J., Duerr, M., Feldmann, T., Freytsis, M., Girrbach, J., Canales, F. González, Hartmann, F., Heeck, J., Helo, J. C., Hirsch, M., Ho, C. M., Holthausen, M., Kadosh, A., Kamenik, J. F., Kilian, W., King, S. F., Ko, P., Kovalenko, S., Krauss, M. B., Kreps, M., Kubo, J., Ligeti, Z., Ludl, P. O., Ma, E., Matias, J., Merle, A., Meroni, A., Mondragón, A., Mondragón, M., Morisi, S., Nandi, S., Omura, Y., Peinado, E., Sala, F., Salazar, U. Saldaña, Schmidt, D., Schnitter, K., Serôdio, H., Simões, C., Spinrath, M., Takano, H., Tanimoto, M., Tórtola, M., Turczyk, S., Vicente, A., Virto, J., Wang, Y. -M., Weiler, T., Yamamoto, K., Yang, M. J. S., Yu, C., and Zwicky, R.
- Subjects
High Energy Physics - Phenomenology - Abstract
These are the proceedings of the 2nd Workshop on Flavor Symmetries and Consequences in Accelerators and Cosmology, held 30 June 2012 - 4 July 2012, Dortmund, Germany., Comment: Order 400 pages, several figures including the group picture v2: corrected author list and contribution
- Published
- 2012
17. Neutrino masses from R-parity violation with a $Z_3$ symmetry
- Author
-
Peinado, E. and Vicente, A.
- Subjects
High Energy Physics - Phenomenology - Abstract
We consider a supersymmetric model where the neutrino mass matrix arises from bilinear and trilinear R-parity violation, both restricted by a $Z_3$ flavor symmetry. Assuming flavor blind soft supersymmetry (SUSY) breaking conditions, corrected at low energies due to running effects, we obtain a neutrino mass matrix in agreement with oscillation data. In particular, a large $\theta_{13}$ angle can be easily accommodated. We also find a correlation between the reactor and atmospheric mixing angles. This leads in some scenarios to a clear deviation from $\theta_{23} = \pi/4$. The Lightest Supersymmetric Particle (LSP) decay, dominated by the trilinear couplings, provides a direct way to test the model at colliders., Comment: 20 pages, 6 figures. v2: matches published version
- Published
- 2012
- Full Text
- View/download PDF
18. Predictive Discrete Dark Matter Model
- Author
-
Boucenna, M. S., Morisi, S., Peinado, E., Shimizu, Y., and Valle, J. W. F.
- Subjects
High Energy Physics - Phenomenology - Abstract
Dark Matter stability can be achieved through a partial breaking of a flavor symmetry. In this framework we propose a type-II seesaw model where left-handed matter transforms nontrivially under the flavor group Delta(54), providing correlations between neutrino oscillation parameters, consistent with the recent Daya-Bay and RENO reactor angle measurements, as well as lower bounds for neutrinoless double beta decay. The dark matter phenomenology is provided by a Higgs-portal., Comment: v1: 4 pages, 2 figures. v2: The discussion is extended to the NH case, 1 additional figure
- Published
- 2012
- Full Text
- View/download PDF
19. Predicting leptonic CP violation in the light of Daya Bay result
- Author
-
Meloni, D., Morisi, S., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology ,High Energy Physics - Experiment - Abstract
In the light of the recent Daya Bay result the reactor angle is about 9 degrees, we reconsider the model presented in arXiv:1005.3482 showing that, when all neutrino oscillation parameters are taken at their best fit values of Schwetz et al and the reactor angle to be the central value of Daya Bay, the predicted value of the CP phase is approximately 45 degrees., Comment: 4 pages, 2 figures, update of arXiv:1005.3482
- Published
- 2012
- Full Text
- View/download PDF
20. A new neutrino mass sum rule from inverse seesaw
- Author
-
Dorame, L., Morisi, S., Peinado, E., Rojas, Alma D., and Valle, J. W. F.
- Subjects
High Energy Physics - Phenomenology ,High Energy Physics - Experiment ,Nuclear Experiment - Abstract
A class of discrete flavor-symmetry-based models predicts constrained neutrino mass matrix schemes that lead to specific neutrino mass sum-rules (MSR). One of these implies in a lower bound on the effective neutrinoless double beta mass parameter, even for normal hierarchy neutrinos. Here we propose a new model based on the S4 flavor symmetry that leads to the new neutrino mass sum-rule and discuss how to generate a nonzero value for the reactor mixing angle indicated by recent experiments, and the resulting correlation with the solar mixing angle., Comment: 14 pages, 4 figures
- Published
- 2012
- Full Text
- View/download PDF
21. Bilinear R-parity violation with flavor symmetry
- Author
-
Bazzocchi, F., Morisi, S., Peinado, E., Valle, J. W. F., and Vicente, A.
- Subjects
High Energy Physics - Phenomenology - Abstract
Bilinear R-parity violation (BRPV) provides the simplest intrinsically supersymmetric neutrino mass generation scheme. While neutrino mixing parameters can be probed in high energy accelerators, they are unfortunately not predicted by the theory. Here we propose a model based on the discrete flavor symmetry $A_4$ with a single R-parity violating parameter, leading to (i) correct Cabbibo mixing given by the Gatto-Sartori-Tonin formula, and a successful unification-like b-tau mass relation, and (ii) a correlation between the lepton mixing angles $\theta_{13}$ and $\theta_{23}$ in agreement with recent neutrino oscillation data, as well as a (nearly) massless neutrino, leading to absence of neutrinoless double beta decay., Comment: 16 pages, 3 figures. Extended version, as published in JHEP
- Published
- 2012
- Full Text
- View/download PDF
22. Proceedings of the first workshop on Flavor Symmetries and consequences in Accelerators and Cosmology (FLASY2011)
- Author
-
Hirsch, M., Meloni, D., Morisi, S., Pastor, S., Peinado, E., Valle, J. W. F., Adulpravitchai, Adisorn, Sierra, D. Aristizabal, Bazzocchi, F., Bhattacharyya, Gautam, Blankenburg, G., Boucenna, M. S., Varzielas, I. de Medeiros, Diaz, Marco Aurelio, Ding, Gui-Jun, Esteves, J. N., Farzan, Yasaman, Saenz, Sebastian Garcia, Grimus, W., Hagedorn, Claudia, Jones-Perez, J., Joshipura, Anjan S., Kadosh, Avihay, Kadota, Kenji, Kang, Sin Kyu, Kersten, Joern, Koch, Benjamin, Krauss, Martin B., Leser, Philipp, Ludl, Patrick Otto, Maurer, Vinzenz, Merlo, Luca, Panotopoulos, Grigoris, Papa, A., Pas, Heinrich, Patel, Ketan M., Rodejohann, Werner, Salazar, U. J. Saldana, Serodio, H., Shimizu, Yusuke, Spinrath, Martin, Stamou, Emmanuel, Sugiyama, Hiroaki, Taoso, M., Toma, Takashi, and Velasco-Sevilla, Liliana
- Subjects
High Energy Physics - Phenomenology - Abstract
The main goals of the first "Workshop on FLAvor SYmmetries and consequences in accelerators and cosmology" (FLASY) was to summarize the theoretical status of flavor symmetries, bringing together young researchers in the field to stimulate discussions and new collaborations, with the aim of investigating possible new physics scenarios to be tested at the LHC, as well as in future neutrino, cosmology experiments and dark matter searches., Comment: Contributions of the 1st Workshop on Flavor Symmetries and consequences in Accelerators and Cosmology 11 - 14 July 2011, Valencia (Spain), 208 pages
- Published
- 2012
23. Dark matter stability from non-Abelian discrete flavor symmetries
- Author
-
Peinado, E.
- Subjects
High Energy Physics - Phenomenology ,Astrophysics - High Energy Astrophysical Phenomena - Abstract
We present a mechanism for the dark matter stability in the framework of a non-Abelian avour symmetry renormalizable model. The same non-abelian discrete avor symmetry which accounts for the observed pattern of neutrino oscillations, spontaneously breaks to a Z2 subgroup which renders DM stable. The simplest scheme leads to a scalar doublet DM potentially detectable in nuclear recoil experiments, inverse neutrino mass hierarchy, hence a neutrinoless double beta decay rate accessible to upcoming searches., Comment: 4 pages, 3 figures. To appear in the TAUP 2011 proceedings
- Published
- 2011
- Full Text
- View/download PDF
24. Constraining neutrinoless double beta decay
- Author
-
Dorame, L., Meloni, D., Morisi, S., Peinado, E., and Valle, J. W. F.
- Subjects
High Energy Physics - Phenomenology ,High Energy Physics - Experiment ,Nuclear Experiment - Abstract
A class of discrete flavor-symmetry-based models predicts constrained neutrino mass matrix schemes that lead to specific neutrino mass sum-rules (MSR). We show how these theories may constrain the absolute scale of neutrino mass, leading in most of the cases to a lower bound on the neutrinoless double beta decay effective amplitude., Comment: 12 pages, 12 figures
- Published
- 2011
- Full Text
- View/download PDF
25. The reactor mixing angle and CP violation with two texture zeros in the light of T2K
- Author
-
Ludl, P. O., Morisi, S., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
We reconsider the phenomenological implications of two texture zeros in symmetric neutrino mass matrices in the light of the recent T2K result for the reactor angle and the new global analysis which gives also best fit values for the Dirac CP phase delta. The most important results of the analysis are: Among the viable cases classified by Frampton et al. only A1 and A2 predict the reactor mixing angle to be different from zero at 3 sigma. Furthermore these two cases are compatible only with a normal mass spectrum in the allowed region for the reactor angle. At the best fit value A1 and A2 predict 0.024 >= sin^2(theta13) >= 0.012 and 0.014 <= sin^2(theta13) <= 0.032, respectively, where the bounds on the right and the left correspond to cos(delta)=-1 and cos(delta)=1, respectively. The cases B1, B2, B3 and B4 predict nearly maximal CP violation, i.e. cos(delta) is approximately zero., Comment: 16 pages, 13 figures, references added, version matches publication in Nucl. Phys. B
- Published
- 2011
- Full Text
- View/download PDF
26. Model for T2K indication with maximal atmospheric angle and tri-maximal solar angle
- Author
-
Morisi, S., Patel, Ketan M., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
Recently T2K gives hint in favor of large reactor angle. Most of the models, with tri-bimaximal mixing at the leading order, can not reproduce such a large mixing angle since they predict typically corrections for the reactor angle of the order of the Cabibbo angle. In this letter, we discuss the possibility to have large reactor angle within the T2K region with maximal atmospheric mixing angle and trimaximal solar mixing angle, through the deviation from tri-bimaximal. We derive the structure of neutrino mass matrix that leads to the large reactor angle leaving maximal atmospheric angle and trimaximal solar angle. It is shown that such a structure of neutrino mass matrix can arise in a model with S4 flavor symmetry., Comment: 7 pages, 2 figures, some references added and text improved
- Published
- 2011
- Full Text
- View/download PDF
27. Admixture of quasi-Dirac and Majorana neutrinos with tri-bimaximal mixing
- Author
-
Morisi, S. and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
We propose a realization of the so-called bimodal/schizophrenic model proposed recently. We assume S4, the permutation group of four objects as flavor symmetry giving tri-bimaximal lepton mixing at leading order. In these models the second massive neutrino state is assumed quasi-Dirac and the remaining neutrinos are Majorana states. In the case of inverse mass hierarchy, the lower bound on the neutrinoless double beta decay parameter m_ee is about two times that of the usual lower bound, within the range of sensitivity of the next generation of experiments., Comment: 8 pages, minor changes to match version accepted in PLB
- Published
- 2011
- Full Text
- View/download PDF
28. Relating quarks and leptons without grand-unification
- Author
-
Morisi, S., Peinado, E., Shimizu, Yusuke, and Valle, J. W. F.
- Subjects
High Energy Physics - Phenomenology - Abstract
In combination with supersymmetry, flavor symmetry may relate quarks with leptons, even in the absence of a grand-unification group. We propose an SU(3)xSU(2)xU(1) model where both supersymmetry and the assumed A4 flavor symmetries are softly broken, reproducing well the observed fermion mass hierarchies and predicting: (i) a relation between down-type quarks and charged lepton masses, and (ii) a correlation between the Cabibbo angle in the quark sector, and the reactor angle characterizing CP violation in neutrino oscillations., Comment: 4 pages, 2 figures, version published in PRD
- Published
- 2011
- Full Text
- View/download PDF
29. Stability of dark matter from the D4xZ2 flavor group
- Author
-
Meloni, D., Morisi, S., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology ,Astrophysics - Cosmology and Extragalactic Astrophysics ,Astrophysics - High Energy Astrophysical Phenomena - Abstract
We study a model based on the dihedral group D4 in which the dark matter is stabilized by the interplay between a remnant Z2 symmetry, of the same spontaneously broken non-abelian group, and an auxiliary Z2 introduced to eliminate unwanted couplings in the scalar potential. In the lepton sector the model is compatible with normal hierarchy only and predicts a vanishing reactor mixing angle. Since m1=0, we also have a simple prediction for the effective mass in terms of the solar angle. There also exists a large portion of the model parameter space where the upper bounds on lepton flavor violating processes are not violated. We incorporate quarks in the same scheme finding that a description of the CKM mixing matrix is possible and that semileptonic K and D decays mediated by flavour changing neutral currents are under control., Comment: 12 pages, model slightly modified adding one scalar field. Neutrino phenomenology unchanged, quark mixings in much better agreement with the data
- Published
- 2011
- Full Text
- View/download PDF
30. Phenomenology of Dark Matter from A4 Flavor Symmetry
- Author
-
Boucenna, M. S., Hirsch, M., Morisi, S., Peinado, E., Taoso, M., and Valle, J. W. F.
- Subjects
High Energy Physics - Phenomenology ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We investigate a model in which Dark Matter is stabilized by means of a Z2 parity that results from the same non-abelian discrete flavor symmetry which accounts for the observed pattern of neutrino mixing. In our A4 example the standard model is extended by three extra Higgs doublets and the Z2 parity emerges as a remnant of the spontaneous breaking of A4 after electroweak symmetry breaking. We perform an analysis of the parameter space of the model consistent with electroweak precision tests, collider searches and perturbativity. We determine the regions compatible with the observed relic dark matter density and we present prospects for detection in direct as well as indirect Dark Matter search experiments., Comment: 15 pages, 4 figures.v2: minor modifications, matches version accepted for publication in JHEP
- Published
- 2011
- Full Text
- View/download PDF
31. Neutrino phenomenology and stable dark matter with A4
- Author
-
Meloni, D., Morisi, S., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
We present a model based on the A4 non-abelian discrete symmetry leading to a predictive five-parameter neutrino mass matrix and providing a stable dark matter candidate. We found an interesting correlation among the atmospheric and the reactor angles which predicts theta_23 ~ pi/4 for very small reactor angle and deviation from maximal atmospheric mixing for large theta_13. Only normal neutrino mass spectrum is possible and the effective mass entering the neutrinoless double beta decay rate is constrained to be |m_ee| > 4 10^{-4} eV., Comment: 7 pages, 2 figures, minor changes to match the version to appear in PLB
- Published
- 2010
- Full Text
- View/download PDF
32. An A4 model for neutrinos
- Author
-
Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
The study of an extension of the standard model based on the flavor symmetry A4 is presented. Neutrino Majorana mass terms arise from dimension five operator and charged lepton masses from renormalizable Yukawa couplings. We introduce three Higgs doublets that belong to one triplet irreducible representation of A4. We study the most general A4-invariant scalar potential and the phenomenological consequences of the model. We find that the reactor angle could be as large as 0.03, while the atmospheric mixing angle is close to maximal., Comment: To appear in the proceedings of PASCOS 2010, the 16th International Symposium on Particles, Strings and Cosmology, Valencia, Spain
- Published
- 2010
- Full Text
- View/download PDF
33. Discrete dark matter
- Author
-
Hirsch, M., Morisi, S., Peinado, E., and Valle, J. W. F.
- Subjects
High Energy Physics - Phenomenology ,Astrophysics - Cosmology and Extragalactic Astrophysics - Abstract
We propose a new motivation for the stability of dark matter (DM). We suggest that the same non-abelian discrete flavor symmetry which accounts for the observed pattern of neutrino oscillations, spontaneously breaks to a Z2 subgroup which renders DM stable. The simplest scheme leads to a scalar doublet DM potentially detectable in nuclear recoil experiments, inverse neutrino mass hierarchy, hence a neutrinoless double beta decay rate accessible to upcoming searches, while reactor angle equal to zero gives no CP violation in neutrino oscillations., Comment: minor changes to match version accepted in PRD, one reference added
- Published
- 2010
- Full Text
- View/download PDF
34. Fritzsch neutrino mass matrix from S3 symmetry
- Author
-
Meloni, D., Morisi, S., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
We present an extension of the Standard Model (SM) based on the discrete flavor symmetry S3 which gives a neutrino mass matrix with two-zero texture of Fritzsch-type and nearly diagonal charged lepton mass matrix. The model is compatible with the normal hierarchy only and predicts the sine squared of the reactor angle to be 0.01 at the best fit values of solar and atmospheric parameters and maximal leptonic CP violation., Comment: 14 pages and 3 figures. Final version to appear in J. Phys G
- Published
- 2010
- Full Text
- View/download PDF
35. An S4 model for quarks and leptons with maximal atmospheric angle
- Author
-
Morisi, S. and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
We consider a model for quark and lepton masses and mixings based on S4 flavor symmetry. The model contains six Higgs doublets where three of them give mass to the leptons and the other three gives mass to the quarks. Charged fermion and quark masses arise from renormalizable interactions while neutrino Majorana masses are generated through effective dimension five Weinberg operator. From the study of the minimization of the scalar potential we found a residual mu-tau symmetry in the neutrino sector predicting zero reactor angle and maximal atmospheric angle and for the quark sector we found a four-zero texture. We give a fit of the mass hierarchies and mixing angles in the quark sector., Comment: some misprinting corrected, one reference and one commment added, version to be published on Phys. Rev. D
- Published
- 2010
- Full Text
- View/download PDF
36. An A4 model for lepton masses and mixings
- Author
-
Morisi, S. and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
We study an extension of the standard model based on the flavor symmetry A4 only. Neutrino Majorana mass terms arise from dimension five operator and charged lepton masses from renormalizable Yukawa couplings. We introduce three Higgs doublets that belong to one triplet irreducible representation of A4. We study the most general A4-invariant scalar potential and the phenomenological consequences of the model. We find that the reactor angle could be as large as 0.03, while the atmospheric mixing angle is close to maximal., Comment: 2 figure changed, some references added. version to appear in PRD
- Published
- 2009
- Full Text
- View/download PDF
37. Charged lepton-flavor violating processes and suppression of nonunitary mixing effects in low-scale seesaw models
- Author
-
Garnica, J. C., primary, Peinado, E., additional, and Hernández-Tomé, G., additional
- Published
- 2023
- Full Text
- View/download PDF
38. Lepton flavour violating processes in an S_3-symmetric model
- Author
-
Mondragon, A., Mondragon, M., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
A variety of lepton flavour violating effects related to the recent discovery of neutrino oscillations and mixings is here systematically discussed in terms of an S_3-flavour permutational symmetry. After presenting some relevant results on lepton masses and mixings, previously derived in a minimal S_3-invariant extension of the Standard Model, we compute the branching ratios of some selected flavour-changing neutral current processes (FCNC) as well as the contribution of the exchange of neutral flavour-changing scalar to the anomaly of the magnetic moment of the muon. We found that the minimal S_3-invariant extension of the Standard Model describes successfully masses and mixings, as well as, all flavour changing neutral current processes in excellent agreement with experiment., Comment: Talk given at XXXI Symposium on Nuclear Physics, Cocoyoc Mexico, January of 2008. To appear in Revista Mexicana de Fisica
- Published
- 2008
39. Nearly tri-bimaximal mixing in the S_3 flavour symmetry
- Author
-
Mondragón, A., Mondragón, M., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
We present an analysis of the theoretical neutrino mixing matrix, V_{PMNS}^{th}, previously derived in the framework of the minimal S_3-invariant extension of the Standard Model. All entries in the neutrino mixing matrix, V_{PMNS}^{th}, the mixing angles and the Majorana phases are given as exact, explicit analytical functions of the mass ratios of the charged leptons and neutrinos, and one Dirac phase, in excellent agreement with the the latest experimental data. Here, it will be shown that all entries in V_{PMNS}^{th} are numerically very close to the tri-bimaximal form of the neutrino mixing matrix, so that V_{PMNS}^{th} may be written as V^{tri}+\Delta V_{PMNS}^{tri}. The small correction \Delta V_{PMNS}^{tri} is expressed as a sum of two terms: first, a small correction term proportional to m_{e}/m_{\mu} depending only on the charged lepton mass ratios and, second, a Cabbibo-like, small term, \delta t_{12}, which is a function of both the charged lepton and the neutrino mass ratios., Comment: 6 pages, Talk given at XI Mexican Workshop on Particles and Fields, Tuxtla Gutierrez, Chiapas, Mexico, 7-12 Nov 2007. To be published in AIP conference proceedings
- Published
- 2007
- Full Text
- View/download PDF
40. S_3-flavour symmetry as realized in lepton flavour violating processes
- Author
-
Mondragón, A., Mondragón, M., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
A variety of lepton flavour violating effects related to the recent discovery of neutrino oscillations and mixings is here systematically discussed in terms of an S_3-flavour permutational symmetry. After a brief review of some relevant results on lepton masses and mixings, that had been derived in the framework of a Minimal S_3-Invariant Extension of the Standard Model, we derive explicit analytical expressions for the matrices of the Yukawa couplings and compute the branching ratios of some selected flavour changing neutral current (FCNC) processes, as well as, the contribution of the exchange of neutral flavour changing scalars to the anomaly of the muon's magnetic moment as functions of the masses of the charged leptons and the neutral Higgs bosons. We find that the S_3 x Z_2 flavour symmetry and the strong mass hierarchy of the charged leptons strongly suppress the FCNC processes in the leptonic sector well below the present experimental upper bounds by many orders of magnitude. The contribution of FCNC to the anomaly of the muon's magnetic moment is small but non-negligible., Comment: 23 pages, one figure. To appear in J. Phys A: Mathematical and Theoretical (SPE QTS5)
- Published
- 2007
- Full Text
- View/download PDF
41. Lepton masses, mixings and FCNC in a minimal S_3-invariant extension of the Standard Model
- Author
-
Mondragon, A., Mondragon, M., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
The mass matrices of the charged leptons and neutrinos, previously derived in a minimal S_3-invariant extension of the Standard Model, were reparametrized in terms of their eigenvalues. We obtained explicit, analytical expressions for all entries in the neutrino mixing matrix, V_PMNS, the neutrino mixing angles and the Majorana phases as functions of the masses of charged leptons and neutrinos in excellent agreement with the latest experimental values. The resulting V_PMNS matrix is very close to the tri-bimaximal form of the neutrino mixing matrix. We also derived explicit analytical expressions for the matrices of the Yukawa couplings and computed the branching ratios of some selected flavour changing neutral current processes as functions of the masses of the charged leptons and the neutral Higgs bosons. We find that the S_3 x Z_2 flavour symmetry and the strong mass hierarchy of the charged leptons strongly suppress the FCNC processes in the leptonic sector well below the present experimental upper bounds by many orders of magnitude., Comment: One paragraph added with comparison to tri-bimaximal mixing, two lines changed in abstract, references added, typographical errors corrected
- Published
- 2007
- Full Text
- View/download PDF
42. Neutrino masses and mixings in a Minimal S_3-invariant Extension of the Standard Model
- Author
-
Felix, O., Mondragon, A., Mondragon, M., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology - Abstract
The mass matrices of the charged leptons and neutrinos, that had been derived in the framework of a Minimal S_3-invariant Extension of the Standard Model, are here reparametrized in terms of their eigenvalues. The neutrino mixing matrix, V_PMNS, is then computed and exact, explicit analytical expressions for the neutrino mixing angles as functions of the masses of the neutrinos and charged leptons are obtained. The reactor, theta_13, and the atmosferic, theta_23, mixing angles are found to be functions only of the masses of the charged leptons. The numerical values of theta_13{th} and theta_23{th} computed from our theoretical expressions are found to be in excellent agreement with the latest experimental determinations. The solar mixing angle, theta_12{th}, is found to be a function of both, the charged lepton and neutrino masses, as well as of a Majorana phase phi_nu. A comparison of our theoretical expression for the solar angle theta_12{th} with the latest experimental value theta_12{exp} ~ 34 deg allowed us to fix the scale and origin of the neutrino mass spectrum and obtain the mass values |m_nu1|=0.0507 eV, |m_nu2|=0.0499 eV and |m_nu3|=0.0193 eV, in very good agreement with the observations of neutrino oscillations, the bounds extracted from neutrinoless double beta decay and the precision cosmological measurements of the CMB., Comment: To appear in the Proceedings of the XXIX Symposium on Nuclear Physics, Cocoyoc, Mex., January 2006. Some typographical errors on formulae corrected
- Published
- 2006
- Full Text
- View/download PDF
43. cLFV processes and suppression of non-unitary mixing effects in low scale seesaw models
- Author
-
Garnica, J. C., Hernández-Tomé, G., and Peinado, E.
- Subjects
High Energy Physics - Phenomenology ,High Energy Physics - Phenomenology (hep-ph) ,FOS: Physical sciences - Abstract
We examine the parameter space region of the inverse seesaw model that is consistent with neutrino oscillation data. We focus on the correlation between the current limits from the search of the $\mu\to e\gamma$ lepton flavour violating decay and the non-standard effects associated with the presence of new heavy neutrino states. Unlike what we would expect from an inverse seesaw model, we have found a parametrization for the mass matrices in which the rates of charged lepton flavour-violating processes are negligible. Additionally, we provide a model where the inverse seesaw is obtained naturally, and the mass matrices get this structure with negligible violation of the lepton flavour., Comment: 20 pages, 3 figures and 3 tables
- Published
- 2023
- Full Text
- View/download PDF
44. Desafios e possibilidades na utilização do módulo especial do Sistema Integrado de Gestão Educacional do Amazonas
- Author
-
Ana Patricia Peinado e Silva
- Subjects
General Medicine - Abstract
Este artigo tem como objetivo apresentar as possibilidades administrativas e pedagógicas na utilização de um sistema informatizado na gestão escolar com foco na inclusão do aluno com necessidade especial. Nesse sentido, a Secretaria de Estado de Educação e Desporto (SEDUC/AM) desenvolveu e implantou o Sistema Integrado de Gestão Educacional do Amazonas (Sigeam), que traz, dentre outros serviços, um módulo chamado Especial. Esse módulo é composto de serviços e relatórios gerenciais que têm por finalidade subsidiar a gestão escolar e a macrogestão da SEDUC/AM, nas tomadas de decisão sobre o público-alvo da educação especial. É importante destacar que o interesse neste tema surgiu a partir de formações ministradas por esta pesquisadora aos gestores escolares, nas quais foram constatadas que estes, não só, não tinham acesso a todos os serviços deste módulo, como sequer conheciam, na íntegra, aqueles aos quais tinham acesso. Assim sendo, considerando esses fatores como condicionantes para o pleno uso do sistema, pondera-se que não basta ter um sistema informatizado, como também é fundamental que se conheçam as possibilidades administrativas e pedagógicas a ele pertinentes, além de possibilitar acesso pleno aos gestores. No que concerne à pesquisa, utilizou-se metodologia de natureza qualitativa exploratória e descritiva, sendo embasada por estudos bibliográficos da temática educação especial, no uso das NTICs e das possibilidades advindas da utilização de sistemas. Destarte, os achados dessa pesquisa trouxeram informações que podem possibilitar à SEDUC/AM ser mais assertiva nas políticas implementadas na área da educação inclusiva. Palavras-chave: educação especial; Sigeam; gestão escolar.
- Published
- 2021
45. Respiratory Subsets in Patients with Moderate to Severe Acute Respiratory Distress Syndrome for Early Prediction of Death
- Author
-
Villar, J., Fernandez, C., Gonzalez-Martin, J.M., Ferrando, C., Anon, J.M., Saz-Ortiz, A.M. del, Diaz-Lamas, A., Bueno-Gonzalez, A., Fernandez, L., Dominguez-Berrot, A.M., Peinado, E., Andaluz-Ojeda, D., Gonzalez-Higueras, E., Vidal, A., Fernandez, M.M., Mora-Ordonez, J.M., Murcia, I., Tarancon, C., Merayo, E., Perez, A., Romera, M.A., Alba, F., Pestana, D., Rodriguez-Suarez, P., Fernandez, R.L., Steyerberg, E.W., Berra, L., Slutsky, A.S., and Spanish Initiative Epidemiology St
- Subjects
stratification ,ARDS criteria ,outcome ,lung-protective ventilation ,General Medicine ,prediction ,mortality - Abstract
Introduction: In patients with acute respiratory distress syndrome (ARDS), the PaO2/FiO2 ratio at the time of ARDS diagnosis is weakly associated with mortality. We hypothesized that setting a PaO2/FiO2 threshold in 150 mm Hg at 24 h from moderate/severe ARDS diagnosis would improve predictions of death in the intensive care unit (ICU). Methods: We conducted an ancillary study in 1303 patients with moderate to severe ARDS managed with lung-protective ventilation enrolled consecutively in four prospective multicenter cohorts in a network of ICUs. The first three cohorts were pooled (n = 1000) as a testing cohort; the fourth cohort (n = 303) served as a confirmatory cohort. Based on the thresholds for PaO2/FiO2 (150 mm Hg) and positive end-expiratory pressure (PEEP) (10 cm H2O), the patients were classified into four possible subsets at baseline and at 24 h using a standardized PEEP-FiO2 approach: (I) PaO2/FiO2 ≥ 150 at PEEP < 10, (II) PaO2/FiO2 ≥ 150 at PEEP ≥ 10, (III) PaO2/FiO2 < 150 at PEEP < 10, and (IV) PaO2/FiO2 < 150 at PEEP ≥ 10. Primary outcome was death in the ICU. Results: ICU mortalities were similar in the testing and confirmatory cohorts (375/1000, 37.5% vs. 112/303, 37.0%, respectively). At baseline, most patients from the testing cohort (n = 792/1000, 79.2%) had a PaO2/FiO2 < 150, with similar mortality among the four subsets (p = 0.23). When assessed at 24 h, ICU mortality increased with an advance in the subset: 17.9%, 22.8%, 40.0%, and 49.3% (p < 0.0001). The findings were replicated in the confirmatory cohort (p < 0.0001). However, independent of the PEEP levels, patients with PaO2/FiO2 < 150 at 24 h followed a distinct 30-day ICU survival compared with patients with PaO2/FiO2 ≥ 150 (hazard ratio 2.8, 95% CI 2.2–3.5, p < 0.0001). Conclusions: Subsets based on PaO2/FiO2 thresholds of 150 mm Hg assessed after 24 h of moderate/severe ARDS diagnosis are clinically relevant for establishing prognosis, and are helpful for selecting adjunctive therapies for hypoxemia and for enrolling patients into therapeutic trials.
- Published
- 2022
46. Desafios e possibilidades na utilização do módulo especial do Sistema Integrado de Gestão Educacional do Amazonas
- Author
-
Peinado e Silva, Ana Patricia, primary
- Published
- 2021
- Full Text
- View/download PDF
47. Neutrino masses, mixings, and FCNC’s in an S 3 flavor symmetric extension of the standard model
- Author
-
Mondragón, A., Mondragón, M., and Peinado, E.
- Published
- 2011
- Full Text
- View/download PDF
48. Sistema Integrado de Gestão Educacional do Amazonas : desafios e possibilidades na utilização do módulo Especial
- Author
-
Ana Patricia Peinado e Silva and Ana Patricia Peinado e Silva
- Abstract
Este livro tem por objetivo apresentar as possibilidades administrativas e pedagógicas na utilização de um sistema informatizado na gestão escolar com foco na inclusão do aluno com necessidade especial. Nesse sentido, a Secretaria de Estado de Educação e Desporto (SEDUC/AM) desenvolveu e implantou o Sistema Integrado de Gestão Educacional do Amazonas (Sigeam), que traz, dentre outros serviços, um módulo chamado Especial. Esse módulo é composto de serviços e relatórios gerenciais que têm por finalidade subsidiar a gestão escolar e a macrogestão da SEDUC/AM nas tomadas de decisão sobre o público-alvo da educação especial. É importante destacar que o interesse neste tema surgiu a partir de formações ministradas por esta pesquisadora aos gestores escolares. Dessa forma, considerando fatores condicionantes para o pleno uso do sistema, pondera-se que não basta ter um sistema informatizado, é fundamental que se conheçam as possibilidades administrativas e pedagógicas a ele pertinentes. No que concerne à pesquisa, utilizou-se metodologia de natureza qualitativa exploratória e descritiva, sendo embasada por estudos bibliográficos da temática educação especial, no uso das NTICs e das possibilidades advindas da utilização de sistemas. É importante destacar que os achados dessa pesquisa trouxeram informações que podem possibilitar à SEDUC/AM ser mais assertiva nas políticas implementadas na área da educação inclusiva.
- Published
- 2022
49. A Prognostic Enrichment Strategy for Selection of Patients With Acute Respiratory Distress Syndrome in Clinical Trials
- Author
-
Villar J, Ambros A, Mosteiro F, Martinez D, Fernandez L, Ferrando C, Carriedo D, Soler J, Parrilla D, Hernandez M, Andaluz-Ojeda D, Anon J, Vidal A, Gonzalez-Higueras E, Martin-Rodriguez C, Diaz-Lamas A, Blanco J, Belda J, Diaz-Dominguez F, Rico-Feijoo J, Martin-Delgado C, Romera M, Fernandez R, Gonzalez-Martin J, del Campo R, Arrojo R, Conesa-Cayuela L, Muriel A, Aldecoa C, Rico J, Martin-Alfonso S, Dominguez A, Gonzalez-Luengo R, Soro M, Gutierrez A, Aguilar G, Montiel R, Peinado E, Perez-Mendez L, Civantos B, Capilla L, Robaglia D, Perez C, Suarez-Sipmann F, Andaluz D, Nogales L, Parra L, Solano R, Bruscas M, Fernandez M, Merayo E, Martinez-Jimenez C, Dominguez-Antelo C, Mora-Ordonez J, Tarancon C, Prieto F, Chico M, Prieto I, Toral D, Corcoles V, Saralegui I, Tallet A, Kacmarek R, and Spanish Initiative Epidemiology St
- Subjects
decision tree analysis ,outcome ,diagnostic accuracy ,decision-making ,acute respiratory distress syndrome - Abstract
Objectives: Incomplete or ambiguous evidence for identifying high-risk patients with acute respiratory distress syndrome for enrollment into randomized controlled trials has come at the cost of an unreasonable number of negative trials. We examined a set of selected variables early in acute respiratory distress syndrome to determine accurate prognostic predictors for selecting high-risk patients for randomized controlled trials. Design: A training and testing study using a secondary analysis of data from four prospective, multicenter, observational studies. Setting: A network of multidisciplinary ICUs. Patients: We studied 1,200 patients with moderate-to-severe acute respiratory distress syndrome managed with lung-protective ventilation. Interventions: None. Measurements and Main Results: We evaluated different thresholds for patient's age, Pao 2 /Fio 2, plateau pressure, and number of extrapulmonary organ failures to predict ICU outcome at 24 hours of acute respiratory distress syndrome diagnosis. We generated 1,000 random scenarios as training (n = 900, 75% of population) and testing (n = 300, 25% of population) datasets and averaged the logistic coefficients for each scenario. Thresholds for age (< 50, 50-70, > 70 yr), Pao 2 /Fio 2 (= 100, 101-150, > 150 mm Hg), plateau pressure (< 29, 29-30, > 30 cm H2O), and number of extrapulmonary organ failure (< 2, 2, > 2) stratified accurately acute respiratory distress syndrome patients into categories of risk. The model that included all four variables proved best to identify patients with the highest or lowest risk of death (area under the receiver operating characteristic curve, 0.86; 95% CI, 0.84-0.88). Decision tree analyses confirmed the accuracy and robustness of this enrichment model. Conclusions: Combined thresholds for patient's age, Pao 2 / Fio 2, plateau pressure, and extrapulmonary organ failure provides prognostic enrichment accuracy for stratifying and selecting acute respiratory distress syndrome patients for randomized controlled trials.
- Published
- 2019
50. Simple A4 models for dark matter stability with texture zeros
- Author
-
de la Vega, Leon M. G., primary, Ferro-Hernandez, R., additional, and Peinado, E., additional
- Published
- 2019
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.