The ATLAS liquid argon hadronic end-cap calorimeter: construction and selected beam test results

ATLAS has chosen for its Hadronic End-Cap Calorimeter (HEC) the copper-liquid argon sampling technique with flat plate geometry and GaAs pre-amplifiers in the argon. The contruction of the calorimeter is now approaching completion. Results of production quality checks are reported and their anticipated impact on calorimeter performance discussed. Selected results, such as linearity, electron and pion energy resolution, uniformity of energy response, obtained in beam tests both of the Hadronic End-Cap Calorimeter by itself, and in the ATLAS configuration where the HEC is in combination with the Electromagnetic End-Cap Calorimeter (EMEC) are described.Comment: 4 pages, 2 figures,IPRD04 conferenc

L’Aula magna dell’Università

1Opera di Raffaello Fagnoni e Umberto Nordio l'Edificio Centrale dell'Università di Trieste costituisce un significativo esempio dell'architettura italiana della seconda metà anni Trenta. Il volume frutto di una lunga ricerca condotta su materiali e documentazione inedita d'archivio a Firenze e Trieste ricostruisce il lungo e travagliato iter progettuale e costruttivo di un edificio che caratterizza la scena urbana tergestina.nonenoneBARILLARI DBarillari, Dian

Exclusive baryon-antibaryon production in γγ\gamma\gamma collisions at e+e- colliders

The exclusive production of baryon-antibaryon pairs in the collisions of two quasi-real photons has been studied using different detectors at e+e- colliders. Results are presented for $\gamma\gamma\to$ proton antiproton, $\gamma\gamma\to\Lambda\bar{\Lambda}$, and $\gamma\gamma\to \Sigma^{0}\bar{\Sigma^{0}}$ final states. The cross-section measurements are compared with all the existing experimental data and with the analytic calculations based on the three-quark model, on the quark-diquark model, and on the handbag model.Comment: 6 pages, 9 figures, proceedings for the "First Workshop on Quark-Hadron Duality and the Transition to pQCD