5,759 research outputs found

    SYNTHESIS OF MOLYBDENUM TRIOSMIUM CLUSTER COMPLEXES - REACTION OF (MU-H)2OS3(CO)10 WITH (ETA-5-C5H5)(CO)2MOCC6H4ME

    No full text
    The reaction of Cp(CO)2 Mo=CTol (Cp = eta-5-C5H5, Tol = p-C6H4Me) and (mu-H)2Os3(CO)10 under mild conditions (5-20-degrees-C) produces three molybdenum-triosmium mixed-metal cluster compounds, CpMoOS3(CO)11[mu-3-eta-2-C(O)CH2Tol] (4, 65%) as a major product together with two minor products CpMoOS3(CO)10(mu-3-CTol)2(mu-H) (5, 10%) and CpMoOs3(CO)10(mu-3-eta-2-C2Tol2)(mu-H) (6, 6%). Compounds 4, 5 and 6 have been isolated as crystalline solids and characterized by spectroscopic methods. Fluxionality of compound 4 has been examined by variable temperature C-13 NMR spectroscopy. Compound 5 in solution undergoes a degenerate metal framework rearrangement. H-1 NMR analysis of the tolyl methyl resonances of 5 for the rearrangement process gives DELTA-G(C)not-equal = 15.2 +/- 0.2 kcal/mol at the temperature of coalescence

    Implementation of a 2.45GHz Passive RFID Transponder Chip in 0.18 mu m CMOS

    No full text
    [[abstract]]In this paper, a passive 2.45GHz band RFID transponder chip for high data rate communication and with low power consumption has been presented. The passive transponder chip contains five parts: a voltage multiplier converts received RE signal to the DC power supply, a mode selector decides the operating status, a low power dissipation LC-tank voltage control oscillator, a 32-bit read only memory, and a modulator. The RF-to-DC circuit can generate the required power supply and bias voltages from received 2.45GHz RF signal with 250mV amplitude. The data stored in 32-bit ROM can modulate the 2.45GHZ carrier generated by VCO at up to 153Mbps for backscattering the data. The chip was designed and implemented by using TSMC 0.18 mu m 1P6M CMOS process. The chip area is 905 mu m x 652 mu n with simulated power consumption less than 4mW. The measurement and simulation results are well matched.[[note]]SC

    Heavy Neutral Leptons in Gauged U(1)LμLτU(1)_{L_\mu-L_\tau} at Muon Collider

    Full text link
    Heavy neutral leptons NN are the most appealing candidates to generate the tiny neutrino masses. In this paper, we study the signature of heavy neutral leptons in gauged U(1)LμLτU(1)_{L_\mu-L_\tau} at a muon collider. Charged under the U(1)LμLτU(1)_{L_\mu-L_\tau} symmetry, the heavy neutral leptons can be pair produced via the new gauge boson ZZ' at muon collider as μ+μZNN\mu^+\mu^-\to Z^{\prime *}\to NN and μ+μZ()γNNγ\mu^+\mu^-\to Z^{\prime (*)} \gamma\to NN\gamma. We then perform a detailed analysis on the lepton number violation signature μ+μNNμ±μ±WW\mu^+\mu^-\to NN\to \mu^\pm\mu^\pm W^\mp W^\mp and μ+μNNγμ±μ±WWγ\mu^+\mu^-\to NN \gamma\to \mu^\pm\mu^\pm W^\mp W^\mp \gamma at the 3 TeV muon collider, where the hadronic decays of WW boson are treated as fat-jets JJ. These lepton number violation signatures have quite clean backgrounds at the muon collider. Our simulation shows that a wide range of viable parameter space is within the reach of the 3 TeV muon collider. For instance, with new gauge coupling g=0.6g'=0.6 and an integrated luminosity of 1000 fb1^{-1}, the μ±μ±JJ\mu^\pm\mu^\pm JJ signal could probe mZ12.5m_{Z'}\lesssim 12.5 TeV. Meanwhile, if the gauge boson mass satisfies 2mN<mZ<s2 m_N<m_{Z'}<\sqrt{s}, the μ±μ±JJγ\mu^\pm\mu^\pm JJ\gamma signature would be more promising than the μ±μ±JJ\mu^\pm\mu^\pm JJ signature.Comment: 20 pages, 8 figures, 2 table

    Evidence for Electroweak Production of W(+/-)W(+/-)jj in pp Collisions at root s=8 TeV with the ATLAS Detector

    No full text
    This Letter presents the first study of W(+/-)W(+/-)jj, same-electric-charge diboson production in association with two jets, using 20.3 fb(-1) of proton-proton collision data at root s = 8 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with two reconstructed same-charge leptons (e(+/-)e(+/-), e(+/-)mu(+/-), and mu(+/-)mu(+/-)) and two or more jets are analyzed. Production cross sections are measured in two fiducial regions, with different sensitivities to the electroweak and strong production mechanisms. First evidence for W(+/-)W(+/-)jj production and electroweak-only W(+/-)W(+/-)jj production is observed with a significance of 4.5 and 3.6 standard deviations, respectively. The measured production cross sections are in agreement with standard model predictions. Limits at 95% confidence level are set on anomalous quartic gauge couplings.From Physical Review Letters (ISSN: 0031-9007, ESSN: 1079-7114). Vol. 113(14), 141803. Copyright ©2014 by American Physical SocietyPublisher version: https://doi.org/10.1103/PhysRevLett.113.14180

    Evidence for Electroweak Production of W(+/-)W(+/-)jj in pp Collisions at root s=8 TeV with the ATLAS Detector

    No full text
    This Letter presents the first study of W(+/-)W(+/-)jj, same-electric-charge diboson production in association with two jets, using 20.3 fb(-1) of proton-proton collision data at root s = 8 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with two reconstructed same-charge leptons (e(+/-)e(+/-), e(+/-)mu(+/-), and mu(+/-)mu(+/-)) and two or more jets are analyzed. Production cross sections are measured in two fiducial regions, with different sensitivities to the electroweak and strong production mechanisms. First evidence for W(+/-)W(+/-)jj production and electroweak-only W(+/-)W(+/-)jj production is observed with a significance of 4.5 and 3.6 standard deviations, respectively. The measured production cross sections are in agreement with standard model predictions. Limits at 95% confidence level are set on anomalous quartic gauge couplings.</p

    Evidence for Electroweak Production of W(+/-)W(+/-)jj in pp Collisions at root s=8 TeV with the ATLAS Detector

    Full text link
    This Letter presents the first study of W(+/-)W(+/-)jj, same-electric-charge diboson production in association with two jets, using 20.3 fb(-1) of proton-proton collision data at root s = 8 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with two reconstructed same-charge leptons (e(+/-)e(+/-), e(+/-)mu(+/-), and mu(+/-)mu(+/-)) and two or more jets are analyzed. Production cross sections are measured in two fiducial regions, with different sensitivities to the electroweak and strong production mechanisms. First evidence for W(+/-)W(+/-)jj production and electroweak-only W(+/-)W(+/-)jj production is observed with a significance of 4.5 and 3.6 standard deviations, respectively. The measured production cross sections are in agreement with standard model predictions. Limits at 95% confidence level are set on anomalous quartic gauge couplings

    Evidence for electroweak production of w(+/-)w(+/-)jj in pp collisions at root s=8 TeV with the ATLAS detector

    No full text
    This Letter presents the first study of W(+/-)W(+/-)jj, same-electric-charge diboson production in association with two jets, using 20.3 fb(-1) of proton-proton collision data at root s = 8 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with two reconstructed same-charge leptons (e(+/-)e(+/-), e(+/-)mu(+/-), and mu(+/-)mu(+/-)) and two or more jets are analyzed. Production cross sections are measured in two fiducial regions, with different sensitivities to the electroweak and strong production mechanisms. First evidence for W(+/-)W(+/-)jj production and electroweak-only W(+/-)W(+/-)jj production is observed with a significance of 4.5 and 3.6 standard deviations, respectively. The measured production cross sections are in agreement with standard model predictions. Limits at 95% confidence level are set on anomalous quartic gauge couplings

    Evidence for electroweak production of w(+/-)w(+/-)jj in pp collisions at root s=8 tev with the atlas detector

    No full text
    This Letter presents the first study of W(+/-)W(+/-)jj, same-electric-charge diboson production in association with two jets, using 20.3 fb(-1) of proton-proton collision data at root s = 8 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with two reconstructed same-charge leptons (e(+/-)e(+/-), e(+/-)mu(+/-), and mu(+/-)mu(+/-)) and two or more jets are analyzed. Production cross sections are measured in two fiducial regions, with different sensitivities to the electroweak and strong production mechanisms. First evidence for W(+/-)W(+/-)jj production and electroweak-only W(+/-)W(+/-)jj production is observed with a significance of 4.5 and 3.6 standard deviations, respectively. The measured production cross sections are in agreement with standard model predictions. Limits at 95% confidence level are set on anomalous quartic gauge couplings.WosScopuswo

    Evidence for Electroweak Production of W±W±jjW^{\pm}W^{\pm}jj in pppp Collisions at s=8\sqrt{s}=8 TeV with the ATLAS Detector

    No full text
    See paper for full list of authors - 7 pages plus author list (20 pages total), 3 figures,2 tables, submitted to PRL, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2013-06/This Letter presents the first study of W±W±jjW^{\pm}W^{\pm}jj, same-electric-charge diboson production in association with two jets, using 20.3 fb1^{-1} of proton--proton collision data at s=8\sqrt{s}=8 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with two reconstructed same-charge leptons (e±e±e^\pm e^\pm, e±μ±e^\pm \mu^\pm, and μ±μ±\mu^\pm \mu^\pm) and two or more jets are analyzed. Production cross sections are measured in two fiducial regions, with different sensitivities to the electroweak and strong production mechanisms. First evidence for W±W±jjW^{\pm}W^{\pm}jj production and electroweak-only W±W±jjW^{\pm}W^{\pm}jj production is observed with a significance of 4.54.5 and 3.63.6 standard deviations respectively. The measured production cross sections are in agreement with Standard Model predictions. Limits at 95% confidence level are set on anomalous quartic gauge couplings

    The vanishing author in computer-generated works: a critical analysis of recent Australian case law

    Full text link
    Abstract The use of software is ubiquitous in the creation of many copyright works, yet the requirement in copyright law that every work have a human author who engages in independent intellectual effort means that its use may prevent copyright subsistence. Several recent Australian cases have refocused attention on authorship as an essential criterion of copyright subsistence, and these cases suggest that much computer-produced output may be authorless and thus lack copyright protection. This article, the first in a two-part series, analyses how each case deals with the question of authorship of computer-produced works and why the use of software diminishes copyright protection for a significant number of computer-generated works. The article critiques the application of conventional notions of human authorship developed in the pre-computer age to modern productions and suggests alternative approaches to authorship that satisfy both the major objectives of copyright policy and the need to adapt to the computer age. The article argues that, without a broader judicial approach to authorship of computer-generated works, Parliament must remedy the lacuna in protection for these ‘authorless’ works. Possible solutions for reform are suggested. In a forthcoming article, the author comprehensively examines those reform proposals
    corecore