1,891 research outputs found

    A New Paradigm for Content Producers

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    WOS:000277653800010 (Nº de Acesso Web of Science)The production, distribution, and consump- tion of information goods have endured numerous challenges over the years. Most recently, the Internet and digital consumer technologies have severely disrupted estab- lished intellectual-property regimes, enabling the near costless reproduction and distribution of information commodities. In addition, so- phisticated tools have enabled new collabora- tive spaces (such as blogs, social websites, and so forth) for media production and distribution, posing new challenges to traditional creator- producer consumer paradigms. This article analyzes the present situation’s main technological characteristics, its eco- nomic implications, and the industry’s response-and outlines a possible solution to the problems

    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