Jets from Jets: Re-clustering as a tool for large radius jet reconstruction and grooming at the LHC

Jets with a large radius $R\gtrsim 1$ and grooming algorithms are widely used to fully capture the decay products of boosted heavy particles at the Large Hadron Collider (LHC). Unlike most discriminating variables used in such studies, the jet radius is usually not optimized for specific physics scenarios. This is because every jet configuration must be calibrated, insitu, to account for detector response and other experimental effects. One solution to enhance the availability of large-$R$ jet configurations used by the LHC experiments is {\it jet re-clustering}. Jet re-clustering introduces an intermediate scale $r<R$ at which jets are calibrated and used as the inputs to reconstruct large radius jets. In this paper we systematically study and propose new jet re-clustering configurations and show that re-clustered large radius jets have essentially the same jet mass performance as large radius groomed jets. Jet re-clustering has the benefit that no additional large-R calibration is necessary, allowing the re-clustered large radius parameter to be optimized in the context of specific precision measurements or searches for new physics

Structures, connexions et modalités de re.

version antérieure d'un texte sur le réalisme structural et la structure ontologique. prononcé au colloque de Métaphysique, Nancy, 2007Analyse du concept ontologique de connexion, en liason avec la modalité d

Brentano et les relations

journée du PEPS "Relations", mai 2008Exposé de la doctrine brentanienne des relation

Structures ontologiques, connexions et modalités de re. Le réalisme strutural

Analyse du concept de 'structure ontologique' à l'intérieur du réalisme structural

Temps, relationnisme et relativisme

Réflexions sur la métaphysique temporelle. L'A. défend une version des tropes temporel

Crise politique et transnationalisation de l’État en Amérique latine : une interprétation théorique

If the crisis of the state has been a common trait in Latin America, its manifestations have not been the same throughout the continent. This article examines two general and apparently contraditory trends : the trend toward authoritarian capitalism resulting from the crisis of hegemony in South America and the trend towards popularly-based insurgency resulting from a crisis of domination in most of Central America. The author bases his general interpretation of these trends on the analysis of the historical and structural relationships between four factors identified as responsible for the drastic change in the role of the state, from "national development" to "national security" : the crisis in the model of accumulation, the growing polarization of political alliance, the transnationalization of the civil society and the state, and the interplay between relative autonomy of the state and transnationalization. He finds that the combination of transnational integration of the Latin American elites into one U.S.-centered project with hegemonic pretensions, and a growing marginalization and alienation on the part of the bulk of the internal constituencies has brought about an acute crisis of both legitimation and domination. As violence becomes the most common political currency -with repression and plain state terrorism evolving into a distinct style of politics - and the prospects towards redemocratization being very fragile, the author concludes that revolutionary struggles may be the only possibility for an indigenous redefinition of development, national self-determination and democracy

Quelques remarques sur l'architecture ontologique de l'oeuvre d'art

Colloque Ingarden Société Polonaise, ParisDiscussion de l'intérêt de l'ontologie de l'art de Wittgenstein, à l'intérieur de son ontologie gnéral

Declarative vs. procedural rules for religious controversy Is Leibniz's rational approach to heresy an example of procedural rationality?

I propose to employ the conceptual contrast between procedural knowledge and declarative knowledge instead of the contrast stressed by Marcelo Dascal (2001, 2005) between soft and hard rationality in Leibniz's thought. I propose to examine the interplay between declarative and procedural knowledge in Leibniz's religious thought, and in particular Leibniz's approach to heresy

Abstraction, objet éternel et occurrence actuelle

Il s'agira ici d'évaluer la cohérence de la doctrine des objets éternels à la lumière des développements récents de la métaphysique des relations internes