: Results of a search for the electroweak associated production of charginos and next-to-lightest neutralinos, pairs of charginos or pairs of tau sleptons are presented. These processes are characterised by final states with at least two hadronically decaying tau leptons, missing transverse momentum and low jet activity. The analysis is based on an integrated luminosity of 20.3 fb−1 of proton-proton collisions at recorded with the ATLAS experiment at the Large Hadron Collider. No significant excess is observed with respect to the (...) predictions from Standard Model processes. Limits are set at 95% confidence level on the masses of the lighter chargino and next-to-lightest neutralino for various hypotheses for the lightest neutralino mass in simplified models. In the scenario of direct production of chargino pairs, with each chargino decaying into the lightest neutralino via an intermediate tau slepton, chargino masses up to 345 GeV are excluded for a massless lightest neutralino. For associated production of mass-degenerate charginos and next-to-lightest neutralinos, both decaying into the lightest neutralino via an intermediate tau slepton, masses up to 410 GeV are excluded for a massless lightest neutralino.[Figure not available: see fulltext.]. (shrink)
The work of the mid-Victorian jurist, AV Dicey, has had a remarkable influence on British constitutional thought, not least in establishing the orthodox framework within which modern constitutional lawyers continue to work. That legal positivist framework has, however, recently been challenged by jurists advocating what is generally called common law constitutionalism. Accepting the core of sense in Dicey’s account, their objective has been to revise some of the jurisprudential underpinnings of his framework for the purpose of showing that the dominant (...) characteristic of the British system is not sovereignty but legality. Mark Walters now builds on this revisionary work by offering a new historically informed study of Dicey’s Law of the Constitution, which is designed to show that the orthodox interpretation of Dicey as a legal positivist is itself misconceived. Walters argues that, properly understood, Dicey had a more nuanced appreciation of the relationship between sovereignty and legality than is commonly appreciated. This review article examines Walters’s exercise and assesses its contemporary significance. (shrink)