29 research outputs found

    Limits on Associated Production of Visibly and Invisibly Decaying Higgs Bosons from Z Decays

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    Many extensions of the standard electroweak model Higgs sector suggest that the main Higgs decay channel is "invisible", for example, h→JJh \to J J where JJ denotes the majoron, a weakly interacting pseudoscalar Goldstone boson associated to the spontaneous violation of lepton number. In many of these models the Higgs boson may also be produced in association to a massive pseudoscalar boson (HA), in addition to the standard Bjorken mechanism (HZ). We describe a general strategy to determine limits from LEP data on the masses and couplings of such Higgs bosons, using the existing data on acoplanar dijet events as well as data on four and six bb jet event topologies. For the sake of illustration, we present constraints that can be obtained for the ALEPH data.Comment: FTUV/94-36, IFIC/94-31 TIFR/TH/94--25, 12 pages + 4 figures (included as ps files at the end

    Novel scalar boson decays in SUSY with broken r-parity

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    R parity violation can induce mixing of the supersymmetric Higgs bosons with the sneutrinos at the tree level. We study the effect of this mixing on the decays of Higgs scalars as well as sneutrinos in an effective model where the violation of R parity is included in the minimal supersymmetric model through bilinear lepton number violating superpotential terms. We show that a small violation of R parity can lead to a sizeable branching ratio for the supersymmetric Higgs boson decay mode H→χℓ (where χ denotes an electroweak gaugino and ℓ is either a tau neutrino or a tau lepton). Relevant constraints on R parity violation as well as those coming from SUSY particle searches still allow the decay H→χℓ to compete with the conventional decay H\ra b \bar{b}, at least for some ranges of parameters of the model. Moreover, the tau sneutrino will have dominant R parity violating decays to standard model fermions bbÂŻ, τ+τ− or to the invisible mode ÎœÎœÂŻ whenever the phase space for R parity conserving channels is closed

    Charged Higgs boson and stau phenomenology in the simplest R-parity breaking model

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    We consider the charged scalar boson phenomenology in the simplest effective low-energy R-parity breaking model characterized by a bilinear violation of R-parity in the superpotential. This induces a mixing between staus and the charged Higgs boson. We show that the charged Higgs boson mass can be lower than expected in the MSSM, even before including radiative corrections. We also study the charged scalar boson decay branching ratios and show that the R-parity violating decay rates can be comparable or even bigger than the R-parity conserving ones. Moreover, if the stau is the LSP it will have only decays into standard model fermions. These features could have important implications for charged supersymmetric scalar boson searches at future accelerators

    Erratum to: 36th International Symposium on Intensive Care and Emergency Medicine

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    [This corrects the article DOI: 10.1186/s13054-016-1208-6.]

    Perfil de los pacientes que acuden al médico internista para valoración de osteoporosis: registro OSTEOMED

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    ProducciĂłn CientĂ­ficaAntecedentes y objetivo: La osteoporosis se considera un trastorno generalizado del esqueleto en el que existe una alteraciĂłn de la resistencia Ăłsea que predispone a la persona a un mayor riesgo de fractura. Este estudio transversal pretende recoger y presentar las principales caracterĂ­sticas clĂ­nicas de los pacientes que acuden a la consulta de los mĂ©dicos internistas en Espa˜na. Conocer estas caracterĂ­sticas podrĂ­a facilitar la puesta en marcha de planes de actuaciĂłn para mejorar la atenciĂłn de estos pacientes de manera mĂĄs eficaz y eficiente. Material y mĂ©todos: A travĂ©s del anĂĄlisis del registro OSTEOMED (Osteoporosis en Medicina Interna), este trabajo presenta las principales caracterĂ­sticas clĂ­nicas de los pacientes con osteoporosis que acudieron a las consultas de Medicina Interna en 23 centros hospitalarios espa˜noles entre 2012 y 2017. Se han analizado los motivos de consulta, los valores densitomĂ©tricos, la presencia de comorbilidades, el tratamiento prescrito y otros factores relacionados con el estilo de vida. Resultados: En total se evaluĂł a 2.024 pacientes con osteoporosis (89,87% mujeres, 10,13% hombres). La edad media de los pacientes fue de 64,1 ± 12,1 a˜nos (mujeres, 64,7 ± 11,5 a˜nos; hombres, 61,2 ± 14,2 a˜nos). No hubo diferencia entre sexos en la historia de caĂ­das recientes (9,1-6,7%), mientras que sĂ­ se apreciĂł en la ingesta diaria de calcio de lĂĄcteos (553,8 ± 332,6 mg en mujeres vs. 450,2 ± 303,3 mg en hombres; p < 0,001) y en causas secundarias de osteoporosis(13% de hombres vs. 6,5% de mujeres; p < 0,001). En la muestra se observaron un total de 404fracturas (20%), destacando el nĂșmero de fracturas vertebrales confirmadas (17,2%, 35,6% enhombres vs. 15,2% de las mujeres; p < 0,001). Una gran parte de los pacientes no recibĂ­a eltratamiento indicado y presentaba bajos niveles de actividad fĂ­sica y exposiciĂłn solar. Un por-centaje importante de pacientes presentĂł comorbilidades asociadas, siendo las mĂĄs frecuentesla hipertensiĂłn (32%) y la dislipidemia (28%).Conclusiones: Estos resultados definen el perfil del paciente con osteoporosis que acude a laconsulta de Medicina Interna en Espa˜na. AdemĂĄs, ponen de manifiesto el carĂĄcter multisistĂ©micode esta entidad que junto con su elevada prevalencia determinan que las consultas especĂ­ficasde Medicina Interna dedicadas a su manejo son el lugar adecuado para la atenciĂłn de estos pacientes

    A922 Sequential measurement of 1 hour creatinine clearance (1-CRCL) in critically ill patients at risk of acute kidney injury (AKI)

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