15,480 research outputs found

    Improved limit on electron neutrino charge radius through a new evaluation of the weak mixing angle

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    We have obtained a new limit on the electron neutrino effective charge radius from a new evaluation of the weak mixing angle by a combined fit of all electron-(anti)neutrino electron elastic scattering measurements. Weak mixing angle is found to be sin^2 theta_W=0.259 \pm 0.025 in the low energy regime below 100 MeV. The electron neutrino charge radius squared is bounded to be in the range -0.13 10^-32 cm^2 < r^2 < 3.32 10^-32 cm^2 at 90 % C.L. Both results improve previously published analyses. We also discuss perspectives of future experiments to improve these constraints.Comment: 10 pages, 2 figures. Final published versio

    Demographic change in the northern forest

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    This brief examines the population redistribution in the Northern Forest, which includes thirty-four counties scattered across northern and central Maine, New Hampshire, New York, and Vermont. Authors Ken Johnson, Susan Stewart, and Miranda Mockrin report that the population of the Northern Forest grew modestly between 2000 and 2010, and the population gains were greatest in recreational areas and least in manufacturing areas. Racial and ethnic diversity is also growing in the Northern Forest, and the population is getting older due to aging in place among current residents and net outmigration among younger populations

    Effective model of the electronic Griffiths phase

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    We present simple analytical arguments explaining the universal emergence of electronic Griffiths phases as precursors of disorder-driven metal-insulator transitions in correlated electronic systems. A simple effective model is constructed and solved within Dynamical Mean Field Theory. It is shown to capture all the qualitative and even quantitative aspects of such Griffiths phases.Comment: 9 pages, 7 figures, one reference corrected; minor corrections include

    Second Generation of 'Miranda Procedure' for CP Violation in Dalitz Studies of B (\& D \& \tau) Decays

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    The `Miranda Procedure' proposed for analyzing Dalitz plots for CP asymmetries in charged B and D decays in a model-independent manner is extended and refined. The complexity of CKM CP phenomenology through order λ6\lambda^6 is needed in searches for New Dynamics (ND). Detailed analyses of three-body final states other great advantages: (i) They give us more powerful tools for deciding whether an observed CP asymmetry rep- resents the manifestation of ND and its features. (ii) Many advantages can already be obtained by the `Miranda Procedure' without construction of a detailed Dalitz plot de- scription. (iii) One studies CP asymmetries independent of production asymmetries. We illustrate the power of a second generation Miranda Procedure with examples with time integrated rates for Bd/BˉdB_d/\bar B_d decays to final states KSπ+π−K_S\pi+\pi- as trial runs with comments on B±→K±π+π−/K±K+K−B^{\pm} \to K^{\pm}\pi^+\pi^-/K^{\pm}K^+K^-.Comment: 29 pages, 7 figure
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