10 research outputs found

    Search for neutral color-octet weak-triplet scalar particles in proton-proton collisions at √s= 8TeV

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    A search for pair production of neutral color-octet weak-triplet scalar particles (Θ0) is performed in processes where one Θ0 decays to a pair of b quark jets and the other to a Z boson plus a jet, with the Z boson decaying to a pair of electrons or muons. The search is performed with data collected by the CMS experiment at the CERN LHC corresponding to an integrated luminosity of 19.7 fb−1 of proton-proton collisions at √s = 8TeV. The number of observed events is found to be in agreement with the standard model predictions. The 95% confidence level upper limit on the product of the cross section and branching fraction is obtained as a function of the Θ0 mass. The 95% confidence level lower bounds on the Θ0 mass are found to be 623 and 426 GeV, for two different octo-triplet theoretical scenarios. These are the first direct experimental bounds on particles predicted by the octo-triplet model. © 2015, The Author(s)

    Search for heavy gauge W ′ bosons in events with an energetic lepton and large missing transverse momentum at √s = 13 TeV

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    A search is presented for W′ bosons in events with an electron or muon and large missing transverse momentum, using proton–proton collision data at √s=13 TeV collected with the CMS detector in 2015 and corresponding to an integrated luminosity of 2.3 fb−1. No evidence of an excess of events relative to the standard model expectations is observed. For a W′ boson described by the sequential standard model, upper limits at 95% confidence level are set on the product of the production cross section and branching fraction and lower limits are established on the new boson mass. Masses below 4.1 TeV are excluded combining electron and muon decay channels, significantly improving upon the results obtained with the 8 TeV data. Exclusion limits at 95% confidence level on the product of the W′ production cross section and branching fraction are also derived in combination with the 8 TeV data. Finally, exclusion limits are set for the production of generic W′ bosons decaying into this final state using a model-independent approach

    Search for neutral MSSM Higgs bosons decaying to μ+μ- in pp collisions at √s=7 and 8 TeV

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    A search for neutral Higgs bosons predicted in the minimal supersymmetric standard model (MSSM) for μ+μ- decay channels is presented. The analysis uses data collected by the CMS experiment at the LHC in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 5.1 and 19.3 fb-1, respectively. The search is sensitive to Higgs bosons produced either through the gluon fusion process or in association with a bb quark pair. No statistically significant excess is observed in the μ+μ- mass spectrum. Results are interpreted in the framework of several benchmark scenarios, and the data are used to set an upper limit on the MSSM parameter tanβ as a function of the mass of the pseudoscalar A boson in the range from 115 to 300 GeV. Model independent upper limits are given for the product of the cross section and branching fraction for gluon fusion and b quark associated production at s=8 TeV. They are the most stringent limits obtained to date in this channel. © 2015 The Authors

    Angular analysis of the decay B0→K*0μ+μ- from pp collisions at s=8 TeV

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    The angular distributions and the differential branching fraction of the decay B0→K⁎(892)0μ+μ− are studied using data corresponding to an integrated luminosity of 20.5 fb −1 collected with the CMS detector at the LHC in pp collisions at s=8 TeV . From 1430 signal decays, the forward–backward asymmetry of the muons, the K⁎(892)0 longitudinal polarization fraction, and the differential branching fraction are determined as a function of the dimuon invariant mass squared. The measurements are among the most precise to date and are in good agreement with standard model predictions

    Effect of high temperature short time infrared roasting of peanuts

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    ABSTRACT: Roasting is the most common processing method that enhances color, and texture. In this study, infrared roasting of peanuts was done using an infrared rotary dryer. Roasting was operated at 90% infrared power (630 W) with different rotating speed (1 and 2 r/min). The effect of roasting was studied at different moisture levels (7.66%, 11.49%, and 13.72% db). From the study, the color parameter, L* value, was found to be significantly different (P < 0.05), and it decreased with the decrease in rotating speed, and the ∆E value varies from 2.32 to 10.56. Results also showed that the antioxidant activity decreased with the reduction in rotating speed as lesser revolutions took longer roasting time, and the values decreased from 84.34% to 71.74%. Minimal changes in total phenolic content were found and varied from 3.62 to 2.10 mg/g GAE, an appropriate limit for good-quality roasted peanuts. The hardness of roasted peanuts ranged from 12.25 to 39.43 N. Moisture content 13.72%, and 1 r/min is the best possible treatment for infrared peanut roasting, significantly enhancing the quality of peanuts. This study concluded that high-power short-time infrared roasting could give good-quality roasted peanuts with optimum bioactive compounds

    Superhydrophobic PVC/SiO2 Coating for Self-Cleaning Application

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    A lotus leaf like self-cleaning superhydrophobic coating has high demand in industrial applications. Such coatings are prepared by alternative dip and spray deposition techniques. A layer of polyvinyl chloride is applied on glass substrate by dip coating and then spray coated a suspension of hydrophobic silica nanoparticles at substrate temperature of 50 °C. This coating procedure is repeated for three times to achieve rough surface morphology which exhibits a water contact angle of 169 ± 2° and sliding angle of 6°. The superhydrophobic state of the coating is still preserved when water volume of 1.2 L is used to impact the water drops on coating surface. The stability of the wetting state of the coating is analyzed against the water jet, adhesive tape and sandpaper abrasion tests. The prepared superhydrophobic coating strongly repelled the muddy water suggesting its importance in self-cleaning applications.This work was financially supported by DST?INSPIRE Faculty Scheme, Department of Science and Technology (DST), Govt. of India. [DST/INSPIRE/04/2015/000281]. SSL acknowledges financial assistance from the Henan University, Kaifeng, P. R. China. The authors greatly appreciate the support of the National Natural Science Foundation of China (21950410531).Scopu

    Kotitalouksien tulot suuralueittain ja väestöryhmittäin : Kotitaloustiedustelu 1971:II

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    Suomen virallinen tilasto (SVT

    Search for neutral MSSM Higgs bosons decaying to μ+μ\mu^{+} \mu^{-} in pp collisions at s= \sqrt{s} = 7 and 8 TeV

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    see paper for full list of authorsInternational audienceA search for neutral Higgs bosons predicted in the minimal supersymmetric standard model (MSSM) for μ+μ\mu^{+} \mu^{-} decay channels is presented. The analysis uses data collected by the CMS experiment at the LHC in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 5.1 and 19.3 fb1^{-1}, respectively. The search is sensitive to Higgs bosons produced through the gluon fusion process and in association with a bb quark pair. No statistically significant excess is observed in the μ+μ\mu^{+} \mu^{-} mass spectrum. Results are interpreted in the framework of several benchmark scenarios, and the data are used to set an upper limit on the MSSM parameter tanβ \tan{ \beta} as a function of the mass of the pseudoscalar A boson in the range from 115 to 300 GeV. Model independent upper limits are given for the product of the cross section and branching fraction for gluon fusion and b quark associated production. They are the most stringent limits obtained to date in this channel

    Hydrogel-Based Controlled Release Formulations: Designing Considerations, Characterization Techniques and Applications

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