Search results for "Charge"

Beta-spectrum shapes of forbidden β decays

2018

The neutrinoless [Formula: see text] decay of atomic nuclei continues to attract fervent interest due to its potential to confirm the possible Majorana nature of the neutrino, and thus the nonconservation of the lepton number. At the same time, the direct dark matter experiments are looking for weakly interacting massive particles (WIMPs) through their scattering on nuclei. The neutrino-oscillation experiments on reactor antineutrinos base their analyses on speculations of [Formula: see text]-spectrum shapes of nuclear decays, thus leading to the notorious “reactor antineutrino anomaly.” In all these experimental efforts, one encounters the problem of [Formula: see text]-spectrum shapes of…

Study of Σ(1385) and Ξ(1321) hyperon and antihyperon production in deep inelastic muon scattering

2013

Large samples of \Lambda, \Sigma(1385) and \Xi(1321) hyperons produced in deep-inelastic muon scattering off a ^6LiD target were collected with the COMPASS experimental setup at CERN. The relative yields of \Sigma(1385)^+, \Sigma(1385)^-, \bar{\Sigma}(1385)^-, \bar{\Sigma}(1385)^+, \Xi(1321)^-, and \bar{\Xi}(1321)^+ hyperons decaying into \Lambda(\bar{\Lambda})\pi were measured. The heavy hyperon to \Lambda and heavy antihyperon to \bar{\Lambda} yield ratios were found to be in the range 3.8% to 5.6% with a relative uncertainty of about 10%. They were used to tune the parameters relevant for strange particle production of the LEPTO Monte Carlo generator.

Integration of flow meter devices for optimal discharge estimation during floods.

2009

Peak flow estimation in ungauged basins by means of water level data analysis.

2009

Deducing the stage-discharge relationship for contracted weirs by the outflow theory of Malcherek

2019

The aim of this paper was the deduction of a new stage-discharge relationship for a contracted weir, having a crest length less than the channel width, by using the Malcherek’s outflow theory. The average outflow velocity over the rectangular contracted weir was expressed in terms of the head over weir, the momentum correction coefficient and the ratio between the crest length and the channel width. This theoretically deduced stage-discharge formula was calibrated by measurements carried out for values of the ratio between the crest length and the channel width ranging from 0.3125 to 0.9375. In particular, a relationship to estimate the momentum correction coefficient for contracted weirs w…

Navigation et sélection de l'information : retour d'expériences

2015

International audience; RÉSUMÉ. Cet article présente un retour d'expériences visant à expérimenter un nouveau dispositif de prévisualisation breveté permettant à des utilisateurs de naviguer et de consulter des pages en profondeur. La tâche consiste à trouver un appartement cible possédant un ou plusieurs critères spécifiques dans un site web d'agence immobilière spécialement conçu. Plusieurs conditions ont été testées. L'une « normale » présentant les caractéristiques classiques de recherche, page par page; l'autre « plan » qui permet de pré-visualiser les pages choisies et de ne sélectionner que les pages pertinentes. Nous nous intéressons à la mise en oeuvre des processus cognitifs où s'…

Un dispositif de prévisualisation qui améliore la navigation : comparaison entre une tablette tactile et une souris 3 D.

2015

International audience; C’est dans le cadre d’une action de recherche pluridisciplinaire (Sciences de l’Information et de la Communication, Psychologie, Ergonomie cognitive) que nous avons voulu vérifier l’hypothèse qu’un dispositif de prévisualisation pouvait améliorer les performances en recherche d’information pour des utilisateurs. L’objectif poursuivi est de tester une condition de prévisualisation en la déclinant sur une tablette tactile (expérience 1) et une souris 3 D incluant des fonctions de navigation modifiées (expérience 2). Deux modalités de recherche sont testées afin de pouvoir analyser les effets de ce dispositif. La première « normale » présente les caractéristiques classi…

Neutrino-nuclear responses for astro-neutrinos, single beta decays and double beta decays

2019

Neutrino–nuclear responses associated with astro-neutrinos, single beta decays and double beta decays are crucial in studies of neutrino properties of interest for astro-particle physics. The present report reviews briefly recent studies of the neutrino–nuclear responses from both experimental and theoretical points of view in order to obtain a consistent understanding of the many facets of the neutrino–nuclear responses. Subjects discussed in this review include (i) experimental studies of neutrino–nuclear responses by means of single beta decays, charge-exchange nuclear reactions, muon- photon- and neutrino–nuclear reactions, and nucleon-transfer reactions, (ii) implications of and discus…

Value of the Axial-Vector Coupling Strength in β and ββ Decays : A Review

2017

Measuring nuclear reaction cross sections to extract information on neutrinoless double beta decay

2017

Neutrinoless double beta decay (0v\b{eta}\b{eta}) is considered the best potential resource to access the absolute neutrino mass scale. Moreover, if observed, it will signal that neutrinos are their own anti-particles (Majorana particles). Presently, this physics case is one of the most important research "beyond Standard Model" and might guide the way towards a Grand Unified Theory of fundamental interactions. Since the 0v\b{eta}\b{eta} decay process involves nuclei, its analysis necessarily implies nuclear structure issues. In the NURE project, supported by a Starting Grant of the European Research Council (ERC), nuclear reactions of double charge-exchange (DCE) are used as a tool to extr…