Search for the standard model Higgs boson decaying to a bbˉb\bar{b} pair in events with no charged leptons and large missing transverse energy using the full CDF data set

We report on a search for the standard model Higgs boson produced in association with a vector boson in the full data set of proton-antiproton collisions at $\sqrt{s} = 1.96$ TeV recorded by the CDF II detector at the Tevatron, corresponding to an integrated luminosity of 9.45 fb$^{-1}$. We consider events having no identified charged lepton, a transverse energy imbalance, and two or three jets, of which at least one is consistent with originating from the decay of a $b$ quark. We place 95% credibility level upper limits on the production cross section times standard model branching fraction for several mass hypotheses between 90 and $150 \mathrm{GeV}/c^2$. For a Higgs boson mass of $125 \mathrm{GeV}/c^2$, the observed (expected) limit is 6.7 (3.6) times the standard model prediction.Comment: Accepted by Phys. Rev. Let

Search for the standard model Higgs boson decaying to a bb pair in events with one charged lepton and large missing transverse energy using the full CDF data set

We present a search for the standard model Higgs boson produced in association with a W boson in sqrt(s) = 1.96 TeV p-pbar collision data collected with the CDF II detector at the Tevatron corresponding to an integrated luminosity of 9.45 fb-1. In events consistent with the decay of the Higgs boson to a bottom-quark pair and the W boson to an electron or muon and a neutrino, we set 95% credibility level upper limits on the WH production cross section times the H->bb branching ratio as a function of Higgs boson mass. At a Higgs boson mass of 125 GeV/c2 we observe (expect) a limit of 4.9 (2.8) times the standard model value.Comment: Submitted to Phys. Rev. Lett (v2 contains clarifications suggested by PRL

Search for the standard model Higgs boson decaying to a bb pair in events with two oppositely-charged leptons using the full CDF data set

We present a search for the standard model Higgs boson produced in association with a Z boson in data collected with the CDF II detector at the Tevatron, corresponding to an integrated luminosity of 9.45/fb. In events consistent with the decay of the Higgs boson to a bottom-quark pair and the Z boson to electron or muon pairs, we set 95% credibility level upper limits on the ZH production cross section times the H -> bb branching ratio as a function of Higgs boson mass. At a Higgs boson mass of 125 GeV/c^2 we observe (expect) a limit of 7.1 (3.9) times the standard model value.Comment: To be submitted to Phys. Rev. Let

Measurement of the difference of CP-violating asymmetries in D0 -> K+K- and D0 ->pi+pi- decays at CDF

We report a measurement of the difference (Delta Acp) between time-integrated CP--violating asymmetries in D0-> K+ K- and D0-> pi+pi- decays reconstructed in the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab, corresponding to 9.7 fb-1 of integrated luminosity. The strong decay D*+->D0 pi+ is used to identify the charm meson at production as D0 or anti-D0. We measure Delta Acp = [-0.62 +- 0.21 (stat) +- 0.10 (syst)] %, which differs from zero by 2.7 Gaussian standard deviations.This result supports similar evidence for CP violation in charm-quark decays obtained in proton-proton collisions.Comment: Phys. Rev. Lett. 109, 111801 (2012

Establecimiento del gusano rojo en plantas de maguey en invernadero

As an attempt to intensively produce the agave red worm Comadia redtenbacheri Hamm., there were tested six different infestation conditions with the goal to accomplish the establishment of larvae placed at the base of young agave plants under greenhouse conditions. In order to encourage infestation, there were used densities of 25, 50 and 100 larvae of third and fourth developing stage with an average weight of 55 milligrams, on two different irrigation conditions under intervals of one and two weeks, to keep vigorous plants and positive ground moisture conditions. Data were analyzed using logistical regression to identify the conditions that favor the best establishment rates. Results suggest that the highest establishment rate is given by the most spread irrigation condition (3 weeks) and lowest population densities (25 larvae for plant); however, the best larval weight was observed under the weekly irrigation scenario.En un intento por producir de manera intensiva al gusano rojo del maguey, se probaron seis condiciones de infestación a fin de lograr el establecimiento de larvas colocadas en la base de plantas jóvenes de agave, bajo condiciones de invernadero. Para favorecer la infestación se usaron densidades de 25, 50 y 100 larvas de tercero y cuarto instar de 55 mg de peso en promedio y dos diferentes condiciones de riego, a intervalos de una y tres semanas, a fin de mantener el vigor de las plantas y las condiciones favorables de humedad del suelo. Los datos se analizaron utilizando regresión logística para identificar las condiciones que favorecen las mejores tasas de establecimiento. Los resultados sugieren que la mayor tasa de establecimiento se da bajo las condiciones de riego más espaciadas (cada tres semanas) y densidades más bajas (25 larvas por planta). Sin embargo, el mayor gramaje por larva se presentó bajo las condiciones de riego semanales

An overview of the Gulf of Bataban\uf3(Cuba): environmental features as revealed by surface sediment characterisation

The main environmental features of the Gulf of Batabano\ub4 , Cuba, Caribbean, were investigated through the analyses of surface sediments collected at 23 sites. In order to highlight the potential threats affecting the sedimentary compartment of this area, samples were analysed for: granulometry, mineralogy, heavy metals concentration (As, Cd, Cu, Mn, Ni, Pb, Zn), organic carbon, total nitrogen and radionuclides. Findings were compared with published data and \u2018\u2018grey\u2019\u2019 literature. Results showed: granulometric homogeneity and a widespread carbonatic condition all over the gulf, probably due to stable bathymetry and lack of terrigenous input (except for the La Coloma basin); a rather pristine environment for what concerns heavy metals pollution, except for La Coloma where a large arsenic input was recorded; very low levels of natural and artificial radioactivity; a relevant quantity of sedimentary organic matter, providing biota with useful substrate for feeding and enhancing the food-web development while indirectly supplying lobster fisheries. Combined data highlighted the impact of the Dique Sur in reducing terrigenous input in the coastal area. Future studies should focus on dating of sediment cores for identifying and quantifying the changes acting in the gulf and on investigating the origins of the large arsenic input to La Coloma