Search results for "cern"
showing 10 items of 318 documents
Combination of Searches for Invisible Higgs Boson Decays with the ATLAS Experiment
2019
Dark matter particles, if sufficiently light, may be produced in decays of the Higgs boson. This Letter presents a statistical combination of searches for H → invisible decays where H is produced according to the standard model via vector boson fusion, Z(ℓℓ)H, and W/Z(had)H, all performed with the ATLAS detector using 36.1 fb⁻¹ of pp collisions at a center-of-mass energy of √s = 13 TeV at the LHC. In combination with the results at √s = 7 and 8 TeV, an exclusion limit on the H → invisible branching ratio of 0.26(0.17-0.05+0.07) at 95% confidence level is observed (expected).
Resolution of the ATLAS muon spectrometer monitored drift tubes in LHC Run 2
2019
The momentum measurement capability of the ATLAS muon spectrometer relies fundamentally on the intrinsic single-hit spatial resolution of the monitored drift tube precision tracking chambers. Optimal resolution is achieved with a dedicated calibration program that addresses the specific operating conditions of the 354 000 high-pressure drift tubes in the spectrometer. The calibrations consist of a set of timing offsets and drift time to drift distance transfer relations, and result in chamber resolution functions. This paper describes novel algorithms to obtain precision calibrations from data collected by ATLAS in LHC Run 2 and from a gas monitoring chamber, deployed in a dedicated gas fac…
L’accertamento del trasferimento d’azienda in caso di cambio di appalto nel rito “Fornero”
2021
Con la sentenza n. 2315/2020 la Suprema Corte ha affermato il principio che l’accertamento dell’anzianità di servizio conseguente ad un trasferimento d’azienda può essere affrontato nell’ambito del rito speciale di impugnazione del licenziamento introdotto dalla L. n. 92/2012. Nella decisione in commento la Corte ha altresì modo di dare continuità all’orientamento per cui la fattispecie traslativa si perfeziona anche in presenza di un mero passaggio di personale in forza di obbligo contrattuale o di legge. Infatti se in un determinato appalto di servizi un imprenditore subentra ad un altro e ne acquisisce il personale e i beni strumentali organizzati (cioè l’azienda), la fattispecie no…
Satyra na Augusta Zaleskiego, czyli o sporze Wojciecha Wasiutyńskiego z "Syreną" paryską
2017
In 1949 the Parisian weekly Syrena published an anonymous satire on President August Zaleski. As it later turned out, it was written by Wojciech Wasiutyński, a well-known journalist and activist of the Stronnictwo Narodowe (National Party). Wasiutyński was not informed about the decision to publish his text and was outraged, demanding compensation. The editorial team explained that the anonymous copies of the satire had circulated among Polish immigrants. The issue echoed a far more significant debate concerning the office of the President of Poland in exile.
Competitive Advantage through Environmental Responsibility? A Case Study of Finnair
2013
In recent years there has been increasing interest in the environmental impacts of aviation, and some airlines have begun to address this issue more seriously. At the same time competition in the aviation industry has become much tougher. This study focuses on the question whether showing pro-active environmental behaviour could work as a differentiation strategy for airlines which are acting more responsibly, thus helping them to improve their competitiveness. For this purpose one airline showing strong pro-environmental behaviour in recent years was chosen as an example: Finland’s flag carrier, Finnair. This paper presents the results of a questionnaire conducted among 148 Finnair custome…
Electron and photon energy calibration with the ATLAS detector using 2015-2016 LHC proton-proton collision data
2019
Artículo realizado por muchos autores. Solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración y los autores que firman como pertenecientes a la UAM
The two-photon decay of X(6900) from light-by-light scattering at the LHC
2022
The LHCb Collaboration has recently discovered a structure around 6.9 GeV in the double-$J/\psi$ mass distribution, possibly a first fully-charmed tetraquark state $X(6900)$. Based on vector-meson dominance (VMD) such a state should have a significant branching ratio for decaying into two photons. We show that the recorded LHC data for the light-by-light scattering may indeed accommodate for such a state, with a $\gamma \gamma$ branching ratio of order of $10^{-4}$, which is larger even than the value inferred by the VMD. The spin-parity assignment $0^{-+}$ is in better agreement with the VMD prediction than $0^{++}$, albeit not significantly at the current precision. Further light-by-light…
La nécropole monumentale Cerny de Passy (Yonne) : description d'ensemble et problèmes d'interprétation
1994
International audience; D'abord repérée d'avion, puis fouillée sur l'emprise d'une gravière, la nécropole néolithique de Passy couvre plus de 20 hectares. Elle se compose d'une trentaine de grands monuments allongés, orientés à l'Est, et construits de terre et de bois. Les défunts, déposés sur le dos dans de probable coffres, reposaient dans des fosses profondes creusées dans l'axe des monuments. Les dépôts funéraires, qui comprennent des objets anthropomorphes, permettent d'attribuer ces sépultures au groupe de Cerny. La diversité des architectures et les phases de réfection constatées suggèrent une certaine dure d'utilisation.En rupture avec les traditions antérieure, ces pratiques funéra…
Une nouvelle nécropole monumentale Cerny à Gron "Les Sablons" (Yonne)
1995
International audience
La nécropole monumentale d'Escolives-Sainte-Camille "La Pièce de l'Étang" (Yonne). Premiers résultats (fouilles 1997-1999)
2004
International audience; La fouille de ce site a été entreprise en collaboration avec l'Université d'Edimbourg (Pr. M. Midgley) dans le cadre d'un projet de recherche sur les origines et les mutations marquant l'éclosion du Néolithique moyen en Sud-Est du Bassin parisien : mieux caractériser les pratiques funéraires et leur évolution, progresser dans la compréhension de la structure sociale, mieux appréhender le modèle d'organisation territoriale.Le site de "La Pièce de l'Étang" à Escolives-Sainte-Camille (Yonne) a volontairement été choisi en amont de l'Yonne moyenne, dans une zone où l'occupation connue relève plutôt d'un Chasséen du Sud et non du Cerny. Repéré par des survols aériens de J…