Relativistic Quantum Scattering of High Energy Fermions in the Presence of Phase Transition

We study the high energy behaviour of fermions hitting a general wall caused by a first-order phase transition. The wall profile is introduced through a general analytic function. The reflection coefficient is computed in the high energy limit and expressed in terms of the poles of the wall profile function. It is shown that the leading singularity gives the high energy behaviour.Comment: 10 page

Process-independent effective coupling and the pion structure function

We sketch the calculation of the pion structure functions within the DSE framework, following two alternative albeit consistent approaches, and . discuss then their QCD evolution, the running driven by an effective charge, from a hadronic scale up to any larger one accessible to experiment.This discussion is based on work completed by an international collaboration involving many remarkable people, to all of whom we are greatly indebted, and it is in connection with other contributions in this volume, e.g. Craig D. Roberts’. We would like to express our gratitude to the organisers of 27th INPC meeting and acknowledge support by the Spanish ministry research project FPA2017-86380 and by the Jiangsu Province Hundred Talents Plan for Professionals

Instanton dominance over αs\alpha_s at low momenta from lattice QCD simulations at Nf=0N_f=0, Nf=2+1N_f=2+1 and Nf=2+1+1N_f=2+1+1

We report on an instanton-based analysis of the gluon Green functions in the Landau gauge for low momenta; in particular we use lattice results for $\alpha_s$ in the symmetric momentum subtraction scheme (${\rm MOM}$) for large-volume lattice simulations. We have exploited quenched gauge field configurations, $N_f=0$, with both Wilson and tree-level Symanzik improved actions, and unquenched ones with $N_f=2+1$ and $N_f=2+1+1$ dynamical flavors (domain wall and twisted-mass fermions, respectively). We show that the dominance of instanton correlations on the low-momenta gluon Green functions can be applied to the determination of phenomenological parameters of the instanton liquid and, eventually, to a determination of the lattice spacing. We furthermore apply the Gradient Flow to remove short-distance fluctuations. The Gradient Flow gets rid of the QCD scale, $\Lambda_{\rm QCD}$, and reveals that the instanton prediction extents to large momenta. For those gauge field configurations free of quantum fluctuations, the direct study of topological charge density shows the appearance of large-scale lumps that can be identified as instantons, giving access to a direct study of the instanton density and size distribution that is compatible with those extracted from the analysis of the Green functions.Comment: Proceedings of the 35th International Symposium on Lattice Field Theory, Granada, Spai

Discretization effects on renormalized gauge-field Green’s functions, scale setting, and the gluon mass

The SUð3Þ gauge-field propagators computed from the lattice have been exhaustively used in the investigation of the low-momentum dynamics of QCD, in a judicious interplay with results from other nonperturbative approaches, and for the extraction of fundamental parameters of QCD like ΛMS as well. The impact of the discretization artifacts and their role in the extrapolation of the results to the continuum limit have not been fully understood so far. We report here about a very careful analysis of the physical scaling violation of the Landau-gauge propagators renormalized in the momentum subtraction scheme and the Taylor coupling, steering us towards an insightful understanding of the effects from discretization artifacts which makes therefore possible a reliable continuum-limit extrapolation.We thank the support of the Spanish Ministerio de Economia y Competitividad (MINECO) No. FPA2017-86380-P research project. The authors are indebted to O. Oliveira and A. Sternbeck for fruitful discussions, mainly in the inception of this work, and to J. Papavassiliou, J. Pawlowski, and C. D. Roberts during its completion. S. Z. acknowledges support by the Deutsche Forschungsgemeinschaft (DFG) Collaborative Research Centre Sonderforschungsbereich (SFB) 1225 (ISOQUANT). Numerical computations have used resources of Centre Informatique National de l'Enseignement Superieur (CINES), Grand National Equipment for Supercomputing (GENCI) Institut du developpement et des ressources en informatique scientifique (IDRIS), and of the Institut national de physique nucleaire et de physique de particules (IN2P3) computing facility in France as well as of Lattice Computer for Scientific Computing (L-CSC) in Germany

A semi-supervised learning approach to study the energy consumption in smart buildings

IEEE Symposium Series on Computational Intelligence (IEEE SSCI 2021), 05/12/2021-07/12/2021.In this work, we use the semi-supervised LAMDA-HSCC algorithm for characterizing the energy consumption in smart buildings, which can work with labeled and unlabeled data. Particularly, it uses the LAMDA-RD approach for the clustering problem and the LAMDA-HAD approach for the classification problem. Additionally, this algorithm uses three submodels for merging, partition groups (classes/cluster) and migrating individuals from a group to another. For the performance evaluation, several datasets of energetic consumption are used, with different percent of labeled data, showing very encouraging results according to two metrics in the semi-supervised context.European CommissionAgencia Estatal de InvestigaciónJunta de Comunidades de Castilla-La Manch

A multi-label approach for diagnosis problems in energy systems using LAMDA algorithm

2022 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE), 18-23 July 2022, Italia.In this paper, we propose a supervised multilabel algorithm called Learning Algorithm for Multivariate Data Analysis for Multilabel Classification (LAMDA-ML). This algorithm is based on the algorithms of the LAMDA family, in particular, on the LAMDA-HAD (Higher Adequacy Grade) algorithm. Unlike previous algorithms in a multi-label context, LAMDA-ML is based on the Global Adequacy Degree (GAD) of an individual in multiple classes. In our proposal, we define a membership threshold (Gt), such that for all GAD values above this threshold, it implies that an individual will be assigned to the respective classes. For the evaluation of the performance of this proposal, a solar power generation dataset is used, with very encouraging results according to several metrics in the context of multiple labels.European CommissionAgencia Estatal de InvestigaciónJunta de Comunidades de Castilla-La Manch

General approach for dealing with dynamical systems with spatiotemporal periodicities

Dynamical systems often contain oscillatory forces or depend on periodic potentials. Time or space periodicity is reflected in the properties of these systems through a dependence on the parameters of their periodic terms. In this paper we provide a general theoretical framework for dealing with these kinds of systems, regardless of whether they are classical or quantum, stochastic or deterministic, dissipative or nondissipative, linear or nonlinear, etc. In particular, we are able to show that simple symmetry considerations determine, to a large extent, how their properties depend functionally on some of the parameters of the periodic terms. For the sake of illustration, we apply this formalism to find the functional dependence of the expectation value of the momentum of a Bose-Einstein condensate, described by the Gross-Pitaewskii equation, when it is exposed to a sawtooth potential whose amplitude is periodically modulated in time. We show that, by using this formalism, a small set of measurements is enough to obtain the functional form for a wide range of parameters. This can be very helpful when characterizing experimentally the response of systems for which performing measurements is costly or difficult.This work has been supported by through Grants No. MTM2012-36732-C03-03 (R.A.N.), No. FIS2011-24540 (N.R.Q.), and PRODIEVO (J.A.C.), from the Ministerio de Economía y Competitividad (Spain), Grants No. FQM262 (R.A.N.), No. FQM207 (N.R.Q.), and Nos. FQM-7276 and P09-FQM-4643 (N.R.Q., R.A.N.), from the Ministerio de Ciencia e Innovación of Spain, Grant No. FIS2008-02873 (J.C.-P.), from Junta de Andalucía (Spain), and from the Alexander von Humboldt-Stiftung, Germany, through Research Fellowship for Experienced Researchers SPA, Grant No. 1146358 STP (N.R.Q.).Publicad

The Argentinian version of the cognitive fusion questionnaire:Psychometric properties and the role of cognitive fusion as a predictor of pathological worry

The Cognitive Fusion Questionnaire (CFQ) consists in an instrument used to measure cognitive fusion. Cognitive fusion can be described as a core process in the psychopathology model of Acceptance and Commitment Therapy (ACT). The purpose of this study was to adapt the CFQ for the Argentinian population, to validate it through a confirmatory factor analysis together with the analysis of its psychometric properties in a local community sample, and to look into the role cognitive fusion plays as a predictor of pathological worry. Three hundred and thirty-three adult participants filled out not only the Argentinian adaptation of the questionnaire (CFQ-VA) but also measures that assessed psychological inflexibility, worry, rumination, mindfulness and psychological well-being. The results indicate that the CFQ’s one-factor structure was confirmed. The instrument showed adequate internal consistency, good temporal stability, and significant associations in the expected directions with relevant selected constructs indicating adequate criterion validity. Also, cognitive fusion emerged as a good predictor of worry. In conclusion, the findings confirm that the Argentinian adaptation of the CFQ presents solid psychometric properties.Fil: José Quintero, Paula S.. Fundación Foro; Argentina. Universidad de Flores; ArgentinaFil: Rodríguez Biglieri, Ricardo. Universidad de la Marina Mercante; Argentina. Instituto de Terapia Cognitivo Conductual; ArgentinaFil: Etchezahar, Edgardo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Centro Interdisciplinario de Investigaciones en Psicología Matemática y Experimental Dr. Horacio J. A. Rimoldi; ArgentinaFil: Gillanders, David T.. University of Edinburgh; Reino Unid