3,122 research outputs found

    Institutional Repository and Archives Partnerships and Futures

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    A reality of dwindling resources in archives, as well as in higher education more broadly, is that the ability to purchase and maintain a specialized archives management and content management software is often out of reach. For Marshall University Special Collections, the solution to make finding aids and other digital archival materials accessible online required evaluating software already available at the university. Marshall Digital Scholar (MDS), an instance of the bepress institutional repository software, was chosen for its immediate availability, robust discovery services within the repository and through outside search engines, statistic tracking capability, metadata flexibility, support for multiple file types, and its availability to researchers on and off campus

    Constraints on the χ_(c1) versus χ_(c2) polarizations in proton-proton collisions at √s = 8 TeV

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    The polarizations of promptly produced χ_(c1) and χ_(c2) mesons are studied using data collected by the CMS experiment at the LHC, in proton-proton collisions at √s=8  TeV. The χ_c states are reconstructed via their radiative decays χ_c → J/ψγ, with the photons being measured through conversions to e⁺e⁻, which allows the two states to be well resolved. The polarizations are measured in the helicity frame, through the analysis of the χ_(c2) to χ_(c1) yield ratio as a function of the polar or azimuthal angle of the positive muon emitted in the J/ψ → μ⁺μ⁻ decay, in three bins of J/ψ transverse momentum. While no differences are seen between the two states in terms of azimuthal decay angle distributions, they are observed to have significantly different polar anisotropies. The measurement favors a scenario where at least one of the two states is strongly polarized along the helicity quantization axis, in agreement with nonrelativistic quantum chromodynamics predictions. This is the first measurement of significantly polarized quarkonia produced at high transverse momentum
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