6,771 research outputs found
Comfortable, lightweight safety helmet holds radio transmitter, receiver
For two-way radio communication where safety gear is required, a lightweight helmet with few protrusions has been designed. The electronics components and power supply are mounted between the inner and outer shells, and resilient padding is used for the lining
Searches for phenomena beyond the Standard Model at the LHC with the ATLAS and CMS detectors
The LHC has delivered several fb-1 of data in spring and summer 2011, opening
new windows of opportunity for discovering phenomena beyond the Standard Model.
A summary of the searches conducted by the ATLAS and CMS experiments based on
about 1 fb-1 of data is presented.Comment: Presented at Lepton-Photon 2011, Mumbai, India; 10 pages, 11 figure
Measurement of Jets and Jet Suppression in sqrt(s_NN)=2.76 TeV Lead-Lead Collisions with the ATLAS detector at the LHC
The first results of single jet observables in Pb+Pb collisions at
sqrt(s_NN)=2.76 TeV measured with the ATLAS detector at the LHC are presented.
Full jets are reconstructed with the anti-kt algorithm with R= 0.2 and 0.4,
using an event-by-event subtraction procedure to correct for the effects of the
underlying event including elliptic flow. The geometrically-scaled ratio of jet
yields in central and peripheral events,Rcp, indicates a clear suppression of
jets with ET >100 GeV. The transverse and longitudinal distributions of jet
fragments is also presented. We find little no substantial change to the
fragmentation properties and no significant change in the level of suppression
when moving to the larger jet definition.Comment: 5 pages, 6 figures, proceedings for Quark Matter 2011, Annecy,
France, May 23-28, 201
Heavy Ion Physics Prospects with the ATLAS Detector at the LHC
The next great energy frontier in Relativistic Heavy Ion Collisions is
quickly approaching with the completion of the Large Hadron Collider and the
ATLAS experiment is poised to make important contributions in understanding QCD
matter at extreme conditions. While designed for high-pT measurements in
high-energy p+p collisions, the detector is well suited to study many aspects
of heavy ion collisions from bulk phenomena to high-pT and heavy flavor
physics. With its large and finely segmented electromagnetic and hadronic
calorimeters, the ATLAS detector excels in measurements of photons and jets,
observables of great interest at the LHC. In this talk, we highlight the
performance of the ATLAS detector for Pb+Pb collisions at the LHC with special
emphasis on a key feature of the ATLAS physics program: jet and direct photon
measurements.Comment: 8 pages, 7 figures, talk presented at the 20th International
Conference on Ultra-Relativistic Nucleus Nucleus Collisions, Jaipur, India,
Feb 4-10, 2008 Updated with Referee Comment
LHC Coverage of RPV MSSM with Light Stops
We examine the sensitivity of recent LHC searches to signatures of
supersymmetry with R-parity violation (RPV). Motivated by naturalness of the
Higgs potential, which would favor light third-generation squarks, and the
stringent LHC bounds on spectra in which the gluino or first and second
generation squarks are light, we focus on scenarios dominated by the pair
production of light stops. We consider the various possible direct and cascade
decays of the stop that involve the trilinear RPV operators. We find that in
many cases, the existing searches exclude stops in the natural mass range and
beyond. However, typically there is little or no sensitivity to cases dominated
by UDD operators or LQD operators involving taus. We propose several ideas for
searches which could address the existing gaps in experimental coverage of
these signals.Comment: 41 pages, 12 figures; v2: included new searches (see footnote 10),
minor corrections and improvement
Measurements of top-quark pair differential cross-sections in the <i>eμ</i> channel in <i>pp</i> collisions at √s = 13 TeV using the ATLAS detector
published_or_final_versio
Search for triboson W±W±W± production in pp collisions at √s = 8 TeV with the ATLAS detector
published_or_final_versio
Measurement of the W boson polarisation in <i>t<i><span style='text-decoration:overline'>t</span></i></i> events from <i>pp</i> collisions at √s = 8 TeV in the lepton + jets channel with ATLAS
published_or_final_versio
Measurement of the inclusive cross-sections of single top-quark and top-antiquark <i>t</i>-channel production in <i>pp</i> collisions at √s = 13 TeV with the ATLAS detector
published_or_final_versio
Personal communication system combines high performance with miniaturization
Personal communication system provides miniaturized components that incorporate high level signal characteristics plus noise rejection in both microphone and earphone circuitry. The microphone is designed to overcome such spacecraft flight problems as size, ambient noise level, and RF interference
- …