Dynamical coupled-channels analysis of 1H(e,e'pi)N reactions

We have performed a dynamical coupled-channels analysis of available p(e,e'pi)N data in the region of W < 1.6 GeV and Q^2 < 1.45 (GeV/c)^2. The channels included are gamma^* N, pi N, eta N, and pi pi N which has pi Delta, rho N, and sigma N components. With the hadronic parameters of the model determined in our previous investigations of pi N --> pi N, pi pi N reactions, we have found that the available data in the considered W < 1.6 GeV region can be fitted well by only adjusting the bare gamma^* N --> N^* helicity amplitudes for the lowest N^* states in P33, P11, S11 and D13 partial waves. The sensitivity of the resulting parameters to the amount of data included in the analysis is investigated. The importance of coupled-channels effect on the p(e,e' pi)N cross sections is demonstrated. The meson cloud effects, as required by the unitarity conditions, on the gamma^* N --> N^* form factors are also examined. Necessary future developments, both experimentally and theoretically, are discussed.Comment: 14 pages, 11 figures. Version to appear in PR

Spin-driven spatial symmetry breaking of spinor condensates in a double-well

The properties of an F=1 spinor Bose-Einstein condensate trapped in a double-well potential are discussed using both a mean-field two-mode approach and a simplified two-site Bose-Hubbard Hamiltonian. We focus in the region of phase space in which spin effects lead to a symmetry breaking of the system, favoring the spatial localization of the condensate in one well. To model this transition we derive, using perturbation theory, an effective Hamiltonian that describes N/2 spin singlets confined in a double-well potential.Comment: 12 pages, 5 figure

Dynamical coupled-channel approach to hadronic and electromagnetic production of kaon-hyperon on the proton

A dynamical coupled-channel formalism for processes $\pi N \to KY$ and $\gamma N \to KY$ is presented which provides a comprehensive investigation of recent data on the $\gamma p \to K^+ \Lambda$ reaction. The non-resonant interactions within the subspace $KY\oplus\pi N$ are derived from effective Lagrangians, using a unitary transformation method. The calculations of photoproduction amplitudes are simplified by casting the coupled-channel equations into a form such that the empirical $\gamma N \to \pi N$ amplitudes are input and only the parameters associated with the $KY$ channel are determined by performing $\chi^2$-fits to all of the available data for $\pi^- p \to K^\circ\Lambda, K^\circ\Sigma^\circ$ and $\gamma p \to K^+\Lambda$. Good agreement between our models and those data are obtained. In the fits to $\pi N \to KY$ channels, most of the parameters are constrained within $\pm 20$ of the values given by the Particle Data Group and/or quark model predictions, while for $\gamma p \to K^+ \Lambda$ parameters, ranges compatible with broken $SU(6)\otimes O(3)$ symmetry are imposed. The main reaction mechanisms in $K^+ \Lambda$ photoproduction are singled out and issues related to newly suggested resonances $S_{11}$, $P_{13}$, and $D_{13}$ are studied. Results illustrating the importance of using a coupled-channel treatment are reported. Meson cloud effects on the $\gamma N \to N^*$ transitions are also discussed.Comment: Accepted Physical Review

Josephson physics of spin-orbit-coupled elongated Bose-Einstein condensates

We consider an ultracold bosonic binary mixture confined in a quasi-one-dimensional double-well trap. The two bosonic components are assumed to be two hyperfine internal states of the same atom. We suppose that these two components are spin-orbit coupled to each other. We employ the two-mode approximation starting from two coupled Gross-Pitaevskii equations and derive a system of ordinary differential equations governing the temporal evolution of the interwell population imbalance of each component and of the polarization, which is the imbalance of the total populations of the two species. From this set of equations we disentangle the different macroscopic quantum tunneling and self-trapping scenarios occurring for both population imbalances and the polarization in terms of the interplay between the interatomic interactions and the other relevant energies in the problem, like the spin-orbit coupling or the conventional tunneling term. We find a rich dynamics in all three variables and discuss the experimental feasibility of such a system

Microscopic NN→NN∗(1440)NN\to NN^{\ast}(1440) transition potential: Determination of πNN∗(1440)\pi NN^{\ast}(1440) and σNN∗(1440)\sigma NN^{\ast}(1440) coupling constants

A $NN\to NN^{\ast}(1440)$ transition potential, based on an effective quark-quark interaction and a constituent quark cluster model for baryons, is derived in the Born-Oppenheimer approach. The potential shows significant differences with respect to those obtained by a direct scaling of the nucleon-nucleon interaction. From its asymptotic behavior we extract the values of $\pi NN^{\ast}(1440)$ and $\sigma NN^{\ast}(1440)$ coupling constants in a particular coupling schemeComment: 15 eps figures, Accepted for publication in Phys. Rev.

Coupled-channels study of the π−p→ηn\pi^{-}p \to \eta n process

The reaction $\pi^{-}p \to \eta n$ is investigated within a dynamical coupled-channels model of meson production reactions in the nucleon resonance region. The meson baryon channels included are $\pi N$, $\eta N$, $\pi \Delta$, $\sigma N$, and $\rho N$. The non-resonant meson-baryon interactions of the model are derived from a set of Lagrangians by using a unitary transformation method. One or two excited nucleon states in each of $S$, $P$, $D$, and $F$ partial waves are included to generate the resonant amplitudes. Data of $\pi^{-}p \to \eta n$ reaction from threshold up to a total center-of-mass energy of about 2 GeV are satisfactorily reproduced and the roles played by the following nine nucleon resonances are investigated: $S_{11}(1535)$, $S_{11}(1650)$, $P_{11}(1440)$, $P_{11}(1710)$, $P_{13}(1720)$, $D_{13}(1520)$, $D_{13}(1700)$, $D_{15}(1675)$, and $F_{15}(1680)$. The reaction mechanism as well as the predicted $\eta N$ scattering length are discussed.Comment: 22 pages, 8 figure

DEFINITION OF THE MAIN FEATURES OF THE STUDENT PROJECTS FOR THEIR DEVELOPMENT AND ASSESSMENT IN THE BACHELOR ENGINEERING IN INDUSTRIAL DESIGN AND PRODUCT DEVELOPMENT AT UNIVERSITAT POLITÈCNICA DE VALÈNCIA CAMPUS OF ALCOI

[EN] The Bachelor Engineering in Industrial Design and Product Development establishes the final project as a compulsory stage to achieve the degree. Due to the wide range of industrial products that can be designed, there is an extensive number of topics. The students can choose their final project according to the specialization they have studied all along the fourth academic year. At Universitat Politècnica de València ¿ Campus d¿Alcoi, three specializations can be studied: a) Product Design; b) Production and Innovation, and c) Textile and Fashion Design. Due to the multidisciplinary approach, there is a need to define a general index, both for students and lecturers, which contains the minimum contents of every type of project. Part of the work consists of analysing the three types of projects and the basic structure for each one, depending on the specialization. In addition, there is a particular project based on communication issues. A team of lecturers are involved in an education project at Universitat Politècnica de València. There is, at least, one representative for each specialization. The team has been working based on the last five years presented final projects and with a National Standard UNE 157001:2014: general criteria for the formal preparation of the documents constituting a technical project. The aim of this part of the project is to define the main structure for the minimum contents that these projects must include for their assessment. Finally, a document has been prepared as a basic guideline for students and lecturers, with definitions and instructions. Despite being four different topics, results show a common part which must be fulfilled by every project. Apart from the common part, every specialization has defined the particular features to be included. This document is useful for every part in the process: students to focus on the tasks to develop, lecturers to guide the students and introduce the process and the panel of teachers to obtain the basis for the evaluation.Bonet-Aracil, M.; Valor Valor, M.; Jorda-Vilaplana, A.; Sempere Ripoll, S.; Juliá Sanchis, E.; Pla-Ferrando, L.; Picó Silvestre, JF.... (2017). DEFINITION OF THE MAIN FEATURES OF THE STUDENT PROJECTS FOR THEIR DEVELOPMENT AND ASSESSMENT IN THE BACHELOR ENGINEERING IN INDUSTRIAL DESIGN AND PRODUCT DEVELOPMENT AT UNIVERSITAT POLITÈCNICA DE VALÈNCIA CAMPUS OF ALCOI. EDULEARN Proceedings (Internet). 9471-9474. doi:10.21125/edulearn.2017.0789S9471947

Strategies to establish the structure and the evaluation system of the student projects in the bachelor engineering in industrial design and product development at Universitat Politècnica de València campus of Alcoi

[EN] The Bachelor Engineering in Industrial Design and Product Development is a multidisciplinary degree, in which a wide range of disciplines have a key role in the final projects developed by the students of the fourth grade. At Universitat Politècnica de València ¿ Campus d¿Alcoi, a number of lecturers are involved in an Education Project in order to change and adapt the evaluation system of the student projects. The current model is based on developing the work with the help of a supervisor and the evaluation carried out by other three teachers, who form the panel. In the frame of the Education Project, some teachers are trying to apply new strategies to improve both the supervising process and the evaluation system of the projects. First of all, an index is provided to the students to adapt the structure of their work. Then, it is intended that a number of teachers, each one from a different specialization, supervise the progress of the students weekly. Finally, the same teachers will take part in the evaluation as examiners. All this work must be integrated in the 120 attendance hours established to develop the project, which correspond to the 12 ECTS. In the frame of the new teaching-learning methodologies, the aim of this Education Project is to provide a system to develop and evaluate the student final projects, taking into account the role of students, supervisors and examiners in every stage of the work.Juliá Sanchis, E.; Jorda-Vilaplana, A.; Valor Valor, M.; Pla-Ferrando, L.; Sempere Ripoll, S.; Picó Silvestre, JF.; Bonet-Aracil, M.... (2017). Strategies to establish the structure and the evaluation system of the student projects in the bachelor engineering in industrial design and product development at Universitat Politècnica de València campus of Alcoi. EDULEARN Proceedings (Internet). 249-255. doi:10.21125/edulearn.2017.0106S24925

Deuteron NN*(1440) components from a chiral quark model

We present a nonrelativistic coupled-channel calculation of the deuteron structure including Delta Delta and NN^*(1440) channels, besides the standard NN S and D-wave components. All the necessary building blocks to perform the calculation have been obtained from the same underlying quark model. The calculated NN^*(1440) probabilities find support in the explanation given to different deuteron reactions.Comment: 4 pages; revtex4, Accepted for publication in Phys. Rev. C (Brief Report

The contribution of Real Madrid’s first five European Cups to the emergence of a common football space

Real Madrid won the first five editions of the European Champion Clubs’ Cup (now formally known as the UEFA Champions League, and to which we will refer hereon as the European Cup) between 1956 and 1960, contributing decisively to the competition’s consolidation. The tournament’s history started towards the end of 1954, when a journalist of the French sports daily L’Équipe, Gabriel Hanot, published an article arguing the need to organise a competition that could bring together the champions of every European league. However, this was not an original proposal. Thirty years before Hanot’s article proposals for such a football competition were circulated among the game’s ruling elite. Unfortunately, at that time the lack of a good transport infrastructure to travel through Europe discouraged the proposers which, instead, turned their attention to regional supranational competitions, such as the Mitropa Cup or the Latin Cup. The first five editions of the European Cup witnessed as many victories of Real Madrid, thus forging an indissoluble bond between the competition and the Spanish club. These five European titles did not only cement the supremacy of Real Madrid on the pitch as a great football team, but they also contributed to the consolidation of the European Cup itself in the public’s imaginary. We also argue that given the expectations raised by Real Madrid’s triumphs across Europe those matches might have contributed as well to the emergence of a European football space. Since 1955 Real Madrid occupied an ever increasing space in the press across Europe. Real Madrid was then considered as the best expression of modernity in football. This chapter aims to analyse the meaning of these five European Cup titles for the emergence and definition of a nascent European football space. We, of course, also question whether such a common space can be found. The chapter explores in depth the reasons behind Real Madrid’s enthusiasm with the new European competition. We also examine the social impact that Real Madrid’s hegemony in the European Cup had in the context of Spain’s international isolation during General Franco’s dictatorship (1939-1975). In order to achieve the above mentioned objectives, the chapter relies on thematic analysis of selected publications in the Spanish and British press during those years. Moreover, we have also relied on a review of academic literature on the role of Real Madrid during the Franco dictatorship years, mainly the 1950s and 60s. This chapter is part of wider on-going research. In this research we examine the content of two Spanish dailies (ABC and Marca) and three British newspapers (The Guardian, The Times and the Daily Mirror). We searched these newspapers for content related to Real Madrid on specific dates: The semifinal games (two legs) and the final of each one of the five years where Real Madrid won the European Cup. We searched for content the day of each match, the day before and two days after each one of the matches. This chapter is a presentation of the findings obtained through thematic analysis of the data obtained through those searches