A survey on reflexivity of abelian topological groups,

a r t i c l e i n f o a b s t r a c t In this survey we deal with results on reflexivity of certain classes of groups, with special emphasis on the smaller class which better reflects the properties of LCA groups, namely that of strongly reflexive groups. A topological abelian group is said to be strongly reflexive if all its closed subgroups and its Hausdorff quotients as well as the closed subgroups and the Hausdorff quotients of its dual group are reflexive

La oxidación de componentes grasos y formación de hexanal en la curación del salchichón

It has studied formation of alcanals of low weight (C3-C6) during the curing of standard Saucisson manufactured in pilot plant. Aldehydes content have been compared to others obtained in three batches of industrial process (I, II and III). Except to hexanal, present in important amounts, the rest of aldehydes appear in reduced levels even are not detected. Statistical correlation has not been obtained between hexanal content and oxidation levels of lipidic components titrated by peroxides value, T.B.A. number or total carbonyl compounds. However, certain correlation has been found between hexanal content and ratio of oleic/linoleic of each batch of saucisson. Absence of hexanal in all of saucissons of batch II is corresponded by a greater proportion of linoleic acid between their A.G.L. It is proposed determination of hexanal like an useful method to check whether oxidative mechanism of lipids during the curing has been corrected.<br><br>Se ha estudiado la formación de alcanales de cadena corta (C3-C6) durante el proceso de curación de un salchichón estándar elaborado en planta piloto. Se ha comparado sus contenidos finales con los obtenidos para otros tres lotes de salchichón de fabricación industrial (I, II, III). Con excepción del hexanal, que se encuentra en cantidades importantes, los otros tres aldehídos aparecen en cantidades muy reducidas o incluso no se detectan. No se ha obtenido una correlación estadística entre el contenido en hexanal y los niveles de oxidación de los componentes grasos valorados a través del índice de peróxidos, el número T.B.A. o los compuestos carbonilos totales.
 Sin embargo, sí existe una cierta correlación entre el contenido en hexanal y las relaciones oleico/linoleico de cada lote de salchichón. La ausencia de hexanal en todos los salchichones del lote II viene correspondida por una mayor proporción de ácido linoleico entre sus AGL. Se propone la determinación de hexanal como un modo útil de comprobar si el mecanismo exudativo de las grasas durante el proceso de curación ha sido correcto

La oxidación de componentes grasos y formación de hexanal en la curación del salchichón

It has studied formation of alcanals of low weight (C3-C6) during the curing of standard Saucisson manufactured in pilot plant. Aldehydes content have been compared to others obtained in three batches of industrial process (I, II and III). Except to hexanal, present in important amounts, the rest of aldehydes appear in reduced levels even are not detected. Statistical correlation has not been obtained between hexanal content and oxidation levels of lipidic components titrated by peroxides value, T.B.A. number or total carbonyl compounds. However, certain correlation has been found between hexanal content and ratio of oleic/linoleic of each batch of saucisson. Absence of hexanal in all of saucissons of batch II is corresponded by a greater proportion of linoleic acid between their A.G.L. It is proposed determination of hexanal like an useful method to check whether oxidative mechanism of lipids during the curing has been corrected.Se ha estudiado la formación de alcanales de cadena corta (C3-C6) durante el proceso de curación de un salchichón estándar elaborado en planta piloto. Se ha comparado sus contenidos finales con los obtenidos para otros tres lotes de salchichón de fabricación industrial (I, II, III). Con excepción del hexanal, que se encuentra en cantidades importantes, los otros tres aldehídos aparecen en cantidades muy reducidas o incluso no se detectan. No se ha obtenido una correlación estadística entre el contenido en hexanal y los niveles de oxidación de los componentes grasos valorados a través del índice de peróxidos, el número T.B.A. o los compuestos carbonilos totales. Sin embargo, sí existe una cierta correlación entre el contenido en hexanal y las relaciones oleico/linoleico de cada lote de salchichón. La ausencia de hexanal en todos los salchichones del lote II viene correspondida por una mayor proporción de ácido linoleico entre sus AGL. Se propone la determinación de hexanal como un modo útil de comprobar si el mecanismo exudativo de las grasas durante el proceso de curación ha sido correcto

A Search for Dark Higgs Bosons

Recent astrophysical and terrestrial experiments have motivated the proposal of a dark sector with GeV-scale gauge boson force carriers and new Higgs bosons. We present a search for a dark Higgs boson using 516 fb-1 of data collected with the BABAR detector. We do not observe a significant signal and we set 90% confidence level upper limits on the product of the Standard Model-dark sector mixing angle and the dark sector coupling constant.Comment: 7 pages, 5 postscript figures, published version with improved plots for b/w printin

Search for the standard model Higgs boson in the H to ZZ to 2l 2nu channel in pp collisions at sqrt(s) = 7 TeV

A search for the standard model Higgs boson in the H to ZZ to 2l 2nu decay channel, where l = e or mu, in pp collisions at a center-of-mass energy of 7 TeV is presented. The data were collected at the LHC, with the CMS detector, and correspond to an integrated luminosity of 4.6 inverse femtobarns. No significant excess is observed above the background expectation, and upper limits are set on the Higgs boson production cross section. The presence of the standard model Higgs boson with a mass in the 270-440 GeV range is excluded at 95% confidence level.Comment: Submitted to JHE

Search for anomalous t t-bar production in the highly-boosted all-hadronic final state

A search is presented for a massive particle, generically referred to as a Z', decaying into a t t-bar pair. The search focuses on Z' resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 5 inverse femtobarns. Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z' modeled for several widths, as well as for a Randall--Sundrum Kaluza--Klein gluon. In addition, the results constrain any enhancement in t t-bar production beyond expectations of the standard model for t t-bar invariant masses larger than 1 TeV.Comment: Submitted to the Journal of High Energy Physics; this version includes a minor typo correction that will be submitted as an erratu

Search for New Physics with Jets and Missing Transverse Momentum in pp collisions at sqrt(s) = 7 TeV

A search for new physics is presented based on an event signature of at least three jets accompanied by large missing transverse momentum, using a data sample corresponding to an integrated luminosity of 36 inverse picobarns collected in proton--proton collisions at sqrt(s)=7 TeV with the CMS detector at the LHC. No excess of events is observed above the expected standard model backgrounds, which are all estimated from the data. Exclusion limits are presented for the constrained minimal supersymmetric extension of the standard model. Cross section limits are also presented using simplified models with new particles decaying to an undetected particle and one or two jets

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