Tests of discrete symmetries and quantum coherence with neutral kaons at the KLOE-2 experiment

The KLOE-2 detector records decays of quantum-entangled pairs of neutral kaons produced in decays of phi mesons provided by the DAFNE accelerator at the Laboratori Nazionali di Frascati, Italy. This system allows for a broad range of studies of fundamental discrete symmetries including tests which are only feasible with entangled neutral mesons. This work reports on the Lorentz non-invariance and CPT violation searches with the KSKL->pi+pi-pi+pi- process in the framework of the Standard Model Extension. Moreover, status and results of quantum coherence tests with the same process are discussed. Finally, the status of ongoing direct tests of T and CPT in neutral kaon transitions is presented. For each of thereported studies, perspectives are discussed for the KLOE-2 experiment, which is presently taking data.Comment: 8 pages, 3 figures Presented at the 2nd Jagiellonian Symposium for Fundamental and Applied Subatomic Physics, June 4-11 2017, Krak\'ow, Poland. Accepted for publication in Acta Physica Polonica

Study of the KSKL→πℓν3π0K_SK_L\to\pi\ell\nu 3 \pi^0 process for time reversal symmetry test at KLOE-2

This work presents prospects for conducting a novel direct test of time-reversal symmetry at the KLOE-2 experiment. Quantum entanglement of neutral K meson pairs uniquely available at KLOE-2 allows to probe directly the time-reversal symmetry (T) independently of CP violation. This is achieved by a comparison of probabilities for a transition between flavour and CP-definite states and its inverse obtained through exchange of initial and final states. As such a test requires the reconstruction of the $K_L\to 3\pi^0$ decay accompanied by $K_S\to\pi^{\pm}\ell^{\mp}\nu$ with good timing information, a new reconstruction method for this process is also presented which is capable of reconstructing the $K_L\to 3\pi^0$ decay with decay time resolution of O(1$\tau_S$).Comment: Submitted to Acta Physica Polonica B (5 pages, 3 figures

Kultura religijna w pamiętnikach mieszkańców wsi

Автор, що досліджує релігійну культуру традиційної локальної спільноти, вказує на характерну особливість мещканців села, зумовлену релігійними цінностями

« Ala ma kota » – « Alice a un chat » : pour l’approche de l’orthographe en classe de FLE

Developing and shaping spelling skills in a foreign language is neither simple nor easy, especially in the case of signifi cant differences between the mother tongue and the foreign language. Moreover, foreign language spelling does not occupy a privileged place in language teaching. This applies to both theoretical studies and school practice. The acquisition of relations between phonemes and graphemes in a foreign language takes place in a random, unsystematic way, without any progression. In order to optimize the process of assimilation of spelling in a foreign language and to propose specific methodological solutions, it would be useful to fi rst of all learn about differences and similarities between spelling systems of the mother tongue and the foreign language. The aim of this article is therefore to compare the graphic systems used by the Polish and the French and to discuss the basic principles on which the spelling system of the Polish language and the spelling system of the French language are based

Parlez-vous cyber ?

The development of new technologies forces their users to employ the language forms which ensure quick and effective forms of communication in the cyberspace. A specific Internet argot is created both at the lexical and morpho-syntactic level. The aim of the article Do you speak "cyber"? is an overview, typology and the analysis of basic lexical forms used by the French Internet chat-users. It is an attempt to look at the French cyber-speech in the context of linguistics and glottodidactics

Z kart historii Katedry Filologii Romańskiej Uniwersytetu Łódzkiego

Zadanie pt. „Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki” nr 885/P-DUN/2014 zostało dofinansowane ze środków MNiSW w ramach działalności upowszechniającej nauk

Search for dark forces with KLOE

During the last years several Dark Sector Models have been proposed in order to address striking astrophysical observations which failed standard interpretations. In the minimal case a new vector particle, the so called dark photon, or A′ or U boson, is introduced, with small coupling with Standard Model particles. Also, the existence of a dark Higgs boson h′ is postulated, in analogy with the Standard Model, to give mass to the U boson through the Spontaneous Symmetry Breaking mechanism. The KLOE experiment working at DAΦNE, an e+e− collider operating in Frascati (near Rome), searched for the existence of the U boson investigating three different processes and six different final states: (1) in Dalitz decays of the ϕ meson ϕ → ηU, with U → e+e− and η → π+π−π0 and π0π0π0, (2) in e+e− → Uh′ events, with U decaying into lepton and pion pairs, (3) in the dark Higgsstrahlung process, e+e− → Uh′, U → μ+μ−, h′ invisible. Limits on the model parameters have been set at 90 % CL for U boson masses below 1 GeV. Further improvements are expected in terms of sensitivity and discovery potential with the new KLOE-2 detector

Le bruitage en tant que declencheur de la créativité et de la parole en classe de langue

To develop communicative competence in L2 does the learner need to have the knowledge of linguistic resources, but also of other factors shaping the situational context in which the act of communication is taking place. The elements bearing directly on effi ciency on information exchange comprise all kinds of noises and sound images which make up a signifi cant part of the broadly conceived communicative context. The present paper aims to raise the question of how the use of sound images in the process of foreign language learning/teaching should be made. Among other issues, it addresses the usefulness of various sounds and noises in stimulating learners’ imagination, creativity and skills, as well as in enhancing spoken output in L2.To develop communicative competence in L2 does the learner need to have the knowledge of linguistic resources, but also of other factors shaping the situational context in which the act of communication is taking place. The elements bearing directly on effi ciency on information exchange comprise all kinds of noises and sound images which make up a signifi cant part of the broadly conceived communicative context. The present paper aims to raise the question of how the use of sound images in the process of foreign language learning/teaching should be made. Among other issues, it addresses the usefulness of various sounds and noises in stimulating learners’ imagination, creativity and skills, as well as in enhancing spoken output in L2