El bienestar laboral

ES] Partiendo del bienestar laboral como catalizador del desempeño individual, se define según la literatura qué es el bienestar laboral y se analizan las dimensiones y los factores que influyen en el bienestar laboral (dimensión sobre la satisfacción laboral, dimensión sobre el respeto organizativo por las personas empleadas, dimensión sobre la relación entre personas empleadas y superiores y dimensión relacionada con la intrusión de la vida laboral en la vida privada y los riesgos psicosociales, especialmente los efectos del trabajo sobre la salud mental y la vida personal de las personas trabajadoras. Se concluye el capítulo con un diagnóstico cuantitativo del bienestar laboral en España

La negociación colectiva

[ES] Se analiza la negociación colectiva como factor de crecimiento económico y mejora del bienestar laboral y en qué medida los procesos de negociación colectiva influyen en la mejora de las condiciones laborales de las personas trabajadoras desde el punto de vista del salario, las condiciones de trabajo, las condiciones de salud y seguridad y las políticas de igualdad entre mujeres y hombres. Se realiza además una medición de la percepción de las personas asalariadas sobre procesos de negociación colectiva y se completa con un análisis cuantitativo sobre la negociación colectiva en España

La influencia de la negociación colectiva en el bienestar laboral, la precariedad laboral, el compromiso y el rendimiento en el trabajo

[ES] El informe que se presenta es el resultado de un trabajo de investigación llevado a cabo por la Fundación 1º de Mayo, la Universidad de Córdoba y la Universidad de León que, con un carácter innovador, aborda el análisis de la negociación colectiva desde ámbitos de estudio no tan habituales como la organización del trabajo y la sociología del trabajo. Al mismo tiempo, esta investigación, asume la idea que, en el ámbito de la dirección de recursos humanos, muchas otras investigaciones han sostenido la necesidad de crear entornos laborales centrados en las necesidades y expectativas de las personas trabajadoras y su bienestar laboral. Esta idea lleva a invertir el orden de prioridades en la investigación, anteponiendo el bienestar laboral y las prácticas para disminuir la precariedad laboral, al rendimiento laboral y, en su caso, el rendimiento o la productividad. En este sentido la lógica de esta investigación parte de la idea de que un mayor bienestar laboral y una menor precariedad laboral, provocan un incremento del compromiso de las personas trabajadoras en sus lugares de trabajo algo que, en última instancia, aumenta el desempeño, o rendimiento, laboral individual. Bienestar laboral y precariedad laboral que, por otro lado, son el resultado de los acuerdos y procesos de negación colectiva. Haciendo una lectura inversa de esta misma lógica, podría decirse que un mayor rendimiento laboral de las personas trabajadoras debe estar fundamentado, o es dependiente, de mayores niveles de bienestar laboral, resultado, en primera instancia, de los acuerdos alcanzados en el marco de la negociación colectiva

Combined search for the quarks of a sequential fourth generation

Results are presented from a search for a fourth generation of quarks produced singly or in pairs in a data set corresponding to an integrated luminosity of 5 inverse femtobarns recorded by the CMS experiment at the LHC in 2011. A novel strategy has been developed for a combined search for quarks of the up and down type in decay channels with at least one isolated muon or electron. Limits on the mass of the fourth-generation quarks and the relevant Cabibbo-Kobayashi-Maskawa matrix elements are derived in the context of a simple extension of the standard model with a sequential fourth generation of fermions. The existence of mass-degenerate fourth-generation quarks with masses below 685 GeV is excluded at 95% confidence level for minimal off-diagonal mixing between the third- and the fourth-generation quarks. With a mass difference of 25 GeV between the quark masses, the obtained limit on the masses of the fourth-generation quarks shifts by about +/- 20 GeV. These results significantly reduce the allowed parameter space for a fourth generation of fermions.Comment: Replaced with published version. Added journal reference and DO

Measurement of the t t-bar production cross section in the dilepton channel in pp collisions at sqrt(s) = 7 TeV

The t t-bar production cross section (sigma[t t-bar]) is measured in proton-proton collisions at sqrt(s) = 7 TeV in data collected by the CMS experiment, corresponding to an integrated luminosity of 2.3 inverse femtobarns. The measurement is performed in events with two leptons (electrons or muons) in the final state, at least two jets identified as jets originating from b quarks, and the presence of an imbalance in transverse momentum. The measured value of sigma[t t-bar] for a top-quark mass of 172.5 GeV is 161.9 +/- 2.5 (stat.) +5.1/-5.0 (syst.) +/- 3.6(lumi.) pb, consistent with the prediction of the standard model.Comment: Replaced with published version. Included journal reference and DO

Search for a W' boson decaying to a bottom quark and a top quark in pp collisions at sqrt(s) = 7 TeV

Results are presented from a search for a W' boson using a dataset corresponding to 5.0 inverse femtobarns of integrated luminosity collected during 2011 by the CMS experiment at the LHC in pp collisions at sqrt(s)=7 TeV. The W' boson is modeled as a heavy W boson, but different scenarios for the couplings to fermions are considered, involving both left-handed and right-handed chiral projections of the fermions, as well as an arbitrary mixture of the two. The search is performed in the decay channel W' to t b, leading to a final state signature with a single lepton (e, mu), missing transverse energy, and jets, at least one of which is tagged as a b-jet. A W' boson that couples to fermions with the same coupling constant as the W, but to the right-handed rather than left-handed chiral projections, is excluded for masses below 1.85 TeV at the 95% confidence level. For the first time using LHC data, constraints on the W' gauge coupling for a set of left- and right-handed coupling combinations have been placed. These results represent a significant improvement over previously published limits.Comment: Submitted to Physics Letters B. Replaced with version publishe

Search for new physics in events with opposite-sign leptons, jets, and missing transverse energy in pp collisions at sqrt(s) = 7 TeV

A search is presented for physics beyond the standard model (BSM) in final states with a pair of opposite-sign isolated leptons accompanied by jets and missing transverse energy. The search uses LHC data recorded at a center-of-mass energy sqrt(s) = 7 TeV with the CMS detector, corresponding to an integrated luminosity of approximately 5 inverse femtobarns. Two complementary search strategies are employed. The first probes models with a specific dilepton production mechanism that leads to a characteristic kinematic edge in the dilepton mass distribution. The second strategy probes models of dilepton production with heavy, colored objects that decay to final states including invisible particles, leading to very large hadronic activity and missing transverse energy. No evidence for an event yield in excess of the standard model expectations is found. Upper limits on the BSM contributions to the signal regions are deduced from the results, which are used to exclude a region of the parameter space of the constrained minimal supersymmetric extension of the standard model. Additional information related to detector efficiencies and response is provided to allow testing specific models of BSM physics not considered in this paper.Comment: Replaced with published version. Added journal reference and DO

Measurement of the triple-differential cross section for photon plus jets production in proton-proton collisions at √s = 7 TeV

Peer reviewe

Search for massive resonances in dijet systems containing jets tagged as W or Z boson decays in pp collisions at √s=8 TeV

Peer reviewe

Search for exotic resonances decaying into WZ/ZZ in pp collisions at √s=7 TeV

Journal of High Energy Physics 2013.2 (2013): 036 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA)Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMA search for new exotic particles decaying to the VZ final state is performed, where V is either a W or a Z boson decaying into two overlapping jets and the Z decays into a pair of electrons, muons or neutrinos. The analysis uses a data sample of pp collisions corresponding to an integrated luminosity of 5 fb-1 collected by the CMS experiment at the LHC at √s=7 TeV in 2011. No significant excess is observed in the mass distribution of the VZ candidates compared with the background expectation from standard model processes. Model-dependent upper limits at the 95% confidence level are set on the product of the cross section times the branching fraction of hypothetical particles decaying to the VZ final state as a function of mass. Sequential standard model W′ bosons with masses between 700 and 940 GeV are excluded. In the Randall-Sundrum model for graviton resonances with a coupling parameter of 0.05, masses between 750 and 880 GeV are also exclude