El mercado de producción independiente en España ante la aparición de Cuatro y laSexta

La aparición en el mercado televisivo analógico de las nuevas ofertas de Cuatro y laSexta no sólo ha modificado el equilibrio entre cadenas sino que también se ha hecho notar en el ámbito de la producción independiente. El presente artículo cuantifica este impacto comparando la última temporada sin su presencia y la de su debut, trazando los patrones de aprovisionamiento de producción independiente detectados en el mercado español. El texto concluye que la aparición de estos dos canales influyó en el incremento del volumen de producción independiente pero no alteró de forma significativa las cuotas de mercado de las diferentes productora

References in communication policy research: a bibliographical characterization of articles published by Spanish authors

This paper provides a characterization of the bibliographicalreferences of Spanish scientific articles in the field ofcommunication policy using a bibliometric approach. Itanalyses 93 articles published by authors from Spanishinstitutions between 2002 and 2011 in major Spanish journalsincluded on the communication section of both the IN RECSindex and the Social Sciences Citation Index. The paperexamines the main references used by Spanish communicationpolicy researchers and the typology of these references, theirSpanish or international character and the most cited authorsin this field. The results show the disparity and adaptability ofarticles depending on the scope of the journals in which theyare published. Thus, articles published in international journalscontain more than twice as many references as those appearingin Spanish journals. The typology is also different; articles arethe most common source in international journals while bookspredominate in Spanish journals. These results are analyzed inthe context of the institutionalized practices of scientificproduction approved by university assessment agencies; theseare compared with the actual practices of researchers throughan analysis of the main bibliographical references

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

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