625 research outputs found
Study of the ATLAS MDT spectrometer using high energy CERN combined test beam data
No full textn 2004, a combined system test was performed in the H8 beam line at the CERN SPS with a setup reproducing the geometry of sectors of the ATLAS Muon Spectrometer, formed by three stations of Monitored Drift Tubes (MDT). The full ATLAS analysis chain was used to obtain the results presented in this paper. The basic design performances of the Muon Spectrometer were verified. The stability of MDT calibration constants, the alignment system using optical devices and high energy tracks, as well as the intrinsic sagitta resolution of the Muon Spectrometer were studied and found to agree with expectations. The reconstruction of muon tracks using the combined information from both the Inner Detector and the Muon Spectrometer are also presented
Standard model Higgs-boson branching ratios with uncertainties.
No full textWe present an update of the branching ratios for Higgs-boson decays in the Standard Model. We list results for all relevant branching ratios together with corresponding uncertainties resulting from input parameters and missing higher-order corrections. As sources of parametric uncertainties we include the masses of the charm, bottom, and top quarks as well as the QCD coupling constant. We compare our results with other predictions in the literature.Peer Reviewe
Distal radius articular fractures: a comparison between ORIF with angular stability plate and percutaneous Kirschner wires.
No full textDistal radius articular fractures: a comparison between ORIF with angular stability plate and percutaneous Kirschner wires.
Tronci V1, Campochiaro G, Gazzotti G, Rebuzzi M, Tsatsis C, Catani F.
Author information
Abstract
PURPOSE OF THE STUDY:
To analize and compare vantages and disadvantages in long-term of two different techniques to treat distal radius articular fractures: ORIF with plate versus percutaneous pinning with K-wires.
MATERIALS AND METHODS:
We reviewed 77 distal radial articular fractures treated surgically from 2005 to 2009. Fractures were divided in two homogeneous groups according to patient age, gender, fracture-type and follow-up. The first group was treated with ORIF using angular stability volar plate, while the second one with closed reduction, K-wires percutaneous pinning and ante-brachial plaster casting. Functional outcomes were assessed with MAYO and DASH score, wrist range-of-movement and handgrip. Radiographic parameters were calculated in the post-operative and long-term x-rays.
RESULTS:
ORIF group showed better mean DASH and MAYO score, range of movement and handgrip strength compare to K-wires group. Expecially in type C fractures and in younger patients (<65 years). Minor differences were observed in type B fractures. About complications: two cases of surgically-treated medial nerve compression in ORIF group and one in K-wire group, one case of algodystrophy in K-wire group. Referring to radiographic parameters, long term values show data positive for ORIF.
CONCLUSIONS:
Though several studies about these techniques has been performed, but no scientific evidence proves the superiority of one surgical treatment. C-type need to be treated with plate in young patients or in elderly patients with high functional demand. Elderly patients with low functional demand can achieve satisfactory results also with percutaneous pinning, especially in Btype fractures
Cantori and dynamical localization in the Bunimovich Stadium
No full textClassical and quantum properties of the Bunimovich stadium in the diffusive regime are reviewed. In particular, the quantum properties are directly investigated using an approximate quantum map. Different localized regimes are found, namely, perturbative, quasi-integrable (due to classical Can- tori), dynamical and ergodic
Expected Performance of the ATLAS ExperimentDetector, Trigger and PhysicsarXiv:0901.0512v1 [hep-ex]
No full textTechnical Design Report sulla Fisica dell'esperimento ATLAS ad LHC
Handbook of LHC Higgs cross sections: 4. Deciphering the nature of the Higgs sector
No full textReport of the results of the activities of the LHC Higgs Cross Section Working Group in the period 2014-2016. Presentation of the state-of-the-art of Higgs physics at the LHC
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