32 research outputs found

    Moments of isovector quark distributions from lattice QCD

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    We present a complete analysis of the chiral extrapolation of lattice moments of all twist-2 isovector quark distributions, including corrections from Nπ and Δπ loops. Even though the Δ resonance formally gives rise to higher order non-analytic structure, the coefficients of the higher order terms for the helicity and transversity moments are large and cancel much of the curvature generated by the wave function renormalization. The net effect is that, whereas the unpolarized moments exhibit considerable curvature, the polarized moments show little deviation from linearity as the chiral limit is approached

    The Physics of the B Factories

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    axillaris

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    Iva axillaris Purshpovertyweed;small-flowered marsh-elder;deeproot;deer-rootive à fleurs axillaires;herbe de pauvretéIva axillaris1 mile north of Val Marie.Along roadside - alkali soil.Large patches on both sides of the road at this location

    Dynamic mode decomposition applied to the shear layer flows in an open channel confluence

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    In open channel confluences, two shear layers are often present: the one delineating the merging flows, called mixing layer or mixing interface, and the other situated between the separation zone and freestream flow. For the case of a 90° open channel confluence, Dynamic Mode Decomposition (DMD) is applied to time-resolved velocity fields in these shear layers, calculated by means of Large-Eddy Simulations. A selection of modes is presented, illustrating the potential of DMD for extracting coherent motion in confluence flows
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