1,887 research outputs found

    Wess-Zumino Current and the Structure of the Decay τ → K^- π^- K^+ v_τ

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    We present the first study of the vector (Wess-Zumino) current in τ → K π^− K^+ ν_τ decay using data collected with the CLEO III detector at the Cornell Electron Storage Ring. We determine the quantitative contributions to the decay width from the vector and axial vector currents. Within the framework of a model by Kühn and Mirkes, we identify the quantitative contributions to the total decay rate from the intermediate states ωπ, ρ^(')π, and K^∗ K

    Yorkshire Dales National Park Authority. Access and Engagement Theory of Change and Evaluation Framework Report

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    The work was done to support the Yorkshire Dales National Park (YDNP) Authority’s Access & Engagement team in developing and refining their Theory of Change (ToC) and to produce an evaluation framework. This should enable the Authority to better understand and articulate the impact of their work and assist with the planning of their future delivery

    The Cleo III Ring Imaging Cherenkov Detector

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    The CLEO detector has been upgraded to include a state of the art particle identification system, based on the Ring Imaging Cherenkov Detector (RICH) technology, in order to take data at the upgraded CESR electron positron collider. The expected performance is reviewed, as well as the preliminary results from an engineering run during the first few months of operation of the CLEO III detector.Comment: 5 pages, 2 Figures Talk given by M. Artuso at 8th Pisa Meeting on Advanced Detectors, May 200

    ABCD Evidence Summary

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    Prospects for Direct CP Violaton in Exclusive and Inclusive Charmless B decays

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    Within the Standard Model, CP rate asymmetries for BKπ+,0B\to K^-\pi^{+,0} could reach 10%. With strong final state phases, they could go up to 20--30%, even for Kˉ0π\bar K^0\pi^- mode which would have opposite sign. We can account for Kπ+K^-\pi^{+}, Kˉ0π\bar K^0\pi^- and ϕK\phi K rate data with new physics enhanced color dipole coupling and destructive interference. Asymmetries could reach 40--60% for KπK\pi and ϕK\phi K modes and are all of the same sign. We are unable to account for Kπ0K^-\pi^0 rate. Our inclusive study supports our exclusive results.Comment: Minor changes, correct a small bug in Fig. 1(b). Version to appear in Phys. Rev. Let

    Lending a hand: Social regulation of the neural response to threat

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    ABSTRACT-Social contact promotes enhanced health and well-being, likely as a function of the social regulation of emotional responding in the face of various life stressors. For this functional magnetic resonance imaging (fMRI) study, 16 married women were subjected to the threat of electric shock while holding their husband's hand, the hand of an anonymous male experimenter, or no hand at all. Results indicated a pervasive attenuation of activation in the neural systems supporting emotional and behavioral threat responses when the women held their husband's hand. A more limited attenuation of activation in these systems occurred when they held the hand of a stranger. Most strikingly, the effects of spousal hand-holding on neural threat responses varied as a function of marital quality, with higher marital quality predicting less threatrelated neural activation in the right anterior insula, superior frontal gyrus, and hypothalamus during spousal, but not stranger, hand-holding

    Asset Based Community Development: Evaluation of Leeds ABCD

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    This report presents findings from the Leeds Asset Based Community Development (ABCD) programme evaluation. ABCD is a neighbourhood-based community building approach that uses community organising methods to identify, mobilise and strengthen the capacities or asset of individuals, families and communities (Kretzmann and McKnight, 1993). At the time of the evaluation. 12 ABCD pathfinder sites operated in Leeds neighbourhoods, the majority established in 2019. The model consists of: • Community Builders - paid workers hosted by Neighbourhood Organisations • Community Connectors - individuals living locally who may organise and support local activities • ‘Small Sparks’ grants - funds for groups and individuals to support local activity. Using mainly qualitative and participatory methods, this collaborative evaluation involved working with Leeds City Council and the Community Builders to gather evidence of what works and how. The findings show that the pioneering Leeds ABCD pathfinder model is still relatively new in its development and shifting to citizen-led activity takes time. Nonetheless the evaluation presents strong evidence on how ABCD works and the mechanisms of change thus demonstrating how a city-wide approach can be implemented. There is strong evidence for better social connections and the pathway to community change. Promising evidence for increased friendships, the social value of the pathfinder model, change in communities and other additional outcomes also exists. A series of recommendations and issues for consideration are presented to inform programme development

    The CLEO-III Ring Imaging Cherenkov Detector

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    The CLEO-III Detector upgrade for charged particle identification is discussed. The RICH design uses solid LiF crystal radiators coupled with multi-wire chamber photon detectors, using TEA as the photosensor, and low-noise Viking readout electronics. Results from our beam test at Fermilab are presented.Comment: Invited talk by R.J. Mountain at ``The 3rd International Workshop on Ring Imaging Cherenkov Detectors," a research workshop of the Israel Science Foundation, Ein-Gedi, Dead-Sea, Israel, Nov. 15-20, 1998, 14 pages, 9 figure

    ABCD Covid-19 Response Summary

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