Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at √s = 8 TeV with the ATLAS detector

Many extensions of the Standard Model posit the existence of heavy particles with long lifetimes. This article presents the results of a search for events containing at least one long-lived particle that decays at a significant distance from its production point into two leptons or into five or more charged particles. This analysis uses a data sample of proton-proton collisions at √s=8  TeV corresponding to an integrated luminosity of 20.3  fb−1 collected in 2012 by the ATLAS detector operating at the Large Hadron Collider. No events are observed in any of the signal regions, and limits are set on model parameters within supersymmetric scenarios involving R-parity violation, split supersymmetry, and gauge mediation. In some of the search channels, the trigger and search strategy are based only on the decay products of individual long-lived particles, irrespective of the rest of the event. In these cases, the provided limits can easily be reinterpreted in different scenarios

Artificial Intelligence and Law 9: 73--78, 2001. 73 Book Review

a rhetorical model of argumentation'. Inreplyhemailedme: "(...) that paper is ashortened version of the first chapter of a manuscript that I currently have with a publisher". November 1999 the book was published in the SUNY series in Logic and Language, the same series as in which, for instance, Walton and Krabbe's Commitment in Dialogue appeared. 2. Structure of the Book A model is a representation of a phenomenon that helps us to describe, analyze, understand, and so on. So, a model of argument helps us to describe, analyze, and understand the phenomenon of argumentation. In AI and Law a model of argument generally consists of a number of definitions of, for example, arguments and defeat between arguments. When I received Acts of Arguing I was curious to see the model Tindale had defined, so I quickly browsed through the contents. The book starts with a general introduction (pp. 1--19). In the first two chapters argument as product (pp. 21--41) and argumentation as dialectical (p

Protest Waves in Western Europe; A Critique of “New Social Movement Theory”

A paradigmatic account of the recent development of social movements has become prominent in European sociology. Labor movements are said to be in decline, and new social movements to be taking their place at the center of contemporary protest and social transformation efforts. These changes are attributed to shifts in the underlying structures of modern society. This article challenges this view, questioning the underlying theoretical assumptions about the relation of class and movement, and offering an alternative framework for understanding recent developments within social movements. The article ends with some reflections on new emerging possibilities

Search for s-channel single top-quark production in proton-proton collisions at √s=8 TeV with the ATLAS detector

This Letter presents a search at the LHC for s-channel single top-quark production in proton–proton collisions at a centre-of-mass energy of 8 TeV. The analyzed data set was recorded by the ATLAS detector and corresponds to an integrated luminosity of 20.3 fb−1. Selected events contain one charged lepton, large missing transverse momentum and exactly two b-tagged jets. A multivariate event classifier based on boosted decision trees is developed to discriminate s-channel single top-quark events from the main background contributions. The signal extraction is based on a binned maximum-likelihood fit of the output classifier distribution. The analysis leads to an upper limit on the s -channel single top-quark production cross-section of 14.6 pb at the 95% confidence level. The fit gives a cross-section of σs=5.0±4.3 pb, consistent with the Standard Model expectation