Search results for "EES"

mixing in the weak-gauged U(4)L⊗U(4)R chiral lagrangian model

1998

Abstract The D0– D 0 mixing is analyzed in a weak gauged U(4)L⊗U(4)R chiral lagrangian model where the electroweak interaction is introduced as a gauge theory over the meson degrees of freedom. This model allows a particular realization of the G.I.M. mechanism and then could be useful in the study of processes where G.I.M. suppression is effective. As a test of the model we have also analyzed the K0– K 0 mixing. We find ΔmK in good agreement with the experimental result and we show that the D0– D 0 mixing is very much suppressed in agreement with previous estimates in the Heavy Quark expansion framework.

An extended flipped SU(5) GUT model and the fermion mass hierarchy

1996

We present a viable flipped version of the SO(10) model consistent with the phenomenological requirements of having a non-trivial quark mixing matrix, natural doublet-triplet splitting, and a single pair of light electroweak Higgs doublet scalar bosons. In the presence of suitable non-renormalizable superpotential terms the model can reproduce the hierarchy observed in quark masses and mixings as well as an acceptable neutrino mass generated via the seesaw mechanism needed to explain dark matter and solar neutrino data.

Relating quarks and leptons with the T7 flavour group

2015

In this letter we present a model for quarks and leptons based on T7 as flavour symmetry, predicting a canonical mass relation between charged leptons and down-type quarks proposed earlier. Neutrino masses are generated through a Type-I seesaw mechanism, with predicted correlations between the atmospheric mixing angle and neutrino masses. Compatibility with oscillation results lead to lower bounds for the lightest neutrino mass as well as for the neutrinoless double beta decay rates, even for normal neutrino mass hierarchy.

Predictions from warped flavor dynamics based on the T′ family group

2020

We propose a realistic theory of fermion masses and mixings using a five-dimensional warped scenario where all fermions propagate in the bulk and the Higgs field is localized on the IR brane. The assumed $T'$ flavor symmetry is broken on the branes by flavon fields, providing a consistent scenario where fermion mass hierarchies arise from adequate choices of the bulk mass parameters, while quark and lepton mixing angles are restricted by the family symmetry. Neutrino mass splittings, mixing parameters and the Dirac CP phase all arise from the type-I seesaw mechanism and are tightly correlated, leading to predictions for the neutrino oscillation parameters, as well as expected \znbb decay ra…

Quark degrees of freedom in hadronic systems

2000

Quantum Chromodynamics (QCD) is the theory of the strong interactions. We review descriptions of hadronic systems motivated by QCD, analyzing the recent controversy between gluonic and bosonic degrees of freedom under the prism of the Cheshire Cat Principle. Our analysis leads to an optimal scheme to study hadronic properties. We proceed to extend this low energy descriptions to the deep inelastic regime.

Representations and derivations of quasi ∗-algebras induced by local modifications of states

2009

Abstract The relationship between the GNS representations associated to states on a quasi ∗-algebra, which are local modifications of each other (in a sense which we will discuss) is examined. The role of local modifications on the spatiality of the corresponding induced derivations describing the dynamics of a given quantum system with infinite degrees of freedom is discussed.

Relationships of leisure-time physical activity and work ability between different occupational physical demands in adult working men

2019

Purpose: Leisure-time physical activity (LTPA) is known to be associated with positive health benefits, but the role of occupational physical demands remains inconsistent. The purpose of the current study was to assess the relationship between LTPA and work ability in different occupational physical activity (OPA) levels between young adult men. - Methods: We performed physical activity measurements in work and leisure time with the long version of International Physical Activity Questionnaire (IPAQ) and work ability with the Work Ability Index (WAI) in 921 Finnish employed male volunteer participants. The participants were divided into LTPA tertiles I ( 28 MET-h/week) and OPA tertiles I (0…

A retrospective international study on factors associated with injury, discomfort and pain perception among cyclists

2019

International audience; Although cycling has been associated with overuse/fatigue and acute injuries, there is lack of information regarding associated risk factors and prevention factors. The objective of the study was to determine the factors associated with injury, and perceptions of discomfort and pain in cyclists. A total of 739 cyclists completed an online questionnaire between February and October 2016. The questionnaire acquired information on participant demographics, characteristics related to cycling profile and fitness training, bike components and cycling posture, self-reported perceptions of comfort and pain, and injuries sustained in the last 12 months. Logistic regression mo…

Eksploratiivinen tutkimus psykologisen ja biologisen tiedon suhteesta skitsofreniassa : skitsofrenian varhaiseen diagnosointiin ja hoitoon suunnatun …

1998

L'ATTIVITA'ì DI FRANCESCO VALENTI A PèALERMO TRA RESTITUZIONE DEL MONUMENTO ORIGINARIO E INTERPRETAZIONE DI UN IDEALE ARCHITETTONICO.

2011

La figura controversa del restauratore siciliano Francesco Valenti viene indagata attraverso due casi d'intervento (Cattedrale e Casa Professa di Palermo), l'uno progettato, l'altro attuato; rivelatori, entrambi, della continuità della sua posizione lungo il novecento, caratterizzata da intenti ripristinatori di immagini ideali dei monumenti oggetto del restauro. Nonostante il proseguire del dibattito nazionale ed europeo sul restauro e pur dicendo di aderire alle idee della scuola italiana di Giovannoni, nei fatti la prassi operativa degli interventi del Valenti rimane profondamente segnata dalla sua formazione originaria