CMS physics technical design report : Addendum on high density QCD with heavy ions

Peer reviewe

Die Nekropole Pianello di Genga.

Analisi della necropoli di Pianello di Genga (AN), uno dei più importanti contesti dell'Italia centrale nel corso dell'età del Bronzo finale, sul piano cronologico, dell'organizzazione topografica, dell'interpretazione sociale

Zurich-Alpenquai : a multidisciplinary approach to the chronological development of a Late Bronze Age lakeside settlement in the northern Circum-Alpine Region

The Alpenquai lake-dwelling is located on Lake Zurich, and can be considered as one of the rare Late Bronze Age lake-dwellings with a pronounced organic-rich cultural layer in the northern Circum-Alpine region. Within a larger research project, investigating the final abandonment of the lakeshores in the Circum-Alpine area at the end of the Late Bronze Age, this settlement has been investigated using a multidisciplinary research design. Combining micromorphology, archaeobotany, palynology, archaeozoology and material culture studies, the formation of the site is reconstructed, and the reasons for its final abandonment are sought. A highly dynamic lake system that caused a lake water level rise before 900 BC, a regression in the second half of the 9th century BC, and a later transgression, could be detected. The settlement appears to have been established during the lake regression, and abandoned during the transgression, proving a high degree of environmental adaptation by its inhabitants. Site formation - Multidisziplinärer Ansat

The performance of the CMS muon detector in proton-proton collisions at √s = 7 TeV at the LHC

The performance of all subsystems of the CMS muon detector has been studied by using a sample of proton-proton collision data at √s = 7 TeV collected at the LHC in 2010 that corresponds to an integrated luminosity of approximately 40 pb-1. The measured distributions of the major operational parameters of the drift tube (DT), cathode strip chamber (CSC), and resistive plate chamber (RPC) systems met the design specifications. The spatial resolution per chamber was 80–120 μm in the DTs, 40–150 μm in the CSCs, and 0.8–1.2 cm in the RPCs. The time resolution achievable was 3 ns or better per chamber for all 3 systems. The efficiency for reconstructing hits and track segments originating from muons traversing the muon chambers was in the range 95–98%. The CSC and DT systems provided muon track segments for the CMS trigger with over 96% efficiency, and identified the correct triggering bunch crossing in over 99.5% of such events. The measured performance is well reproduced by Monte Carlo simulation of the muon system down to the level of individual channel response. The results confirm the high efficiency of the muon system, the robustness of the design against hardware failures, and its effectiveness in the discrimination of backgrounds

The CMS experiment at the CERN LHC

The Compact Muon Solenoid (CMS) detector is described. The detector operates at the Large Hadron Collider (LHC) at CERN. It was conceived to study proton-proton (and lead-lead) collisions at a centre-of-mass energy of 14 TeV (5.5 TeV nucleon-nucleon) and at luminosities up to 10(34)cm(-2)s(-1) (10(27)cm(-2)s(-1)). At the core of the CMS detector sits a high-magnetic-field and large-bore superconducting solenoid surrounding an all-silicon pixel and strip tracker, a lead-tungstate scintillating-crystals electromagnetic calorimeter, and a brass-scintillator sampling hadron calorimeter. The iron yoke of the flux-return is instrumented with four stations of muon detectors covering most of the 4 pi solid angle. Forward sampling calorimeters extend the pseudo-rapidity coverage to high values (vertical bar eta vertical bar <= 5) assuring very good hermeticity. The overall dimensions of the CMS detector are a length of 21.6 m, a diameter of 14.6 m and a total weight of 12500 t