Observation of Orbitally Excited B_s Mesons

We report the first observation of two narrow resonances consistent with states of orbitally excited (L=1) B_s mesons using 1 fb^{-1} of ppbar collisions at sqrt{s} = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. We use two-body decays into K^- and B^+ mesons reconstructed as B^+ \to J/\psi K^+, J/\psi \to \mu^+ \mu^- or B^+ \to \bar{D}^0 \pi^+, \bar{D}^0 \to K^+ \pi^-. We deduce the masses of the two states to be m(B_{s1}) = 5829.4 +- 0.7 MeV/c^2 and m(B_{s2}^*) = 5839.7 +- 0.7 MeV/c^2.Comment: Version accepted and published by Phys. Rev. Let

Data from a pre-publication independent replication initiative examining ten moral judgement effects

We present the data from a crowdsourced project seeking to replicate findings in independent laboratories before (rather than after) they are published. In this Pre-Publication Independent Replication (PPIR) initiative, 25 research groups attempted to replicate 10 moral judgment effects from a single laboratory's research pipeline of unpublished findings. The 10 effects were investigated using online/lab surveys containing psychological manipulations (vignettes) followed by questionnaires. Results revealed a mix of reliable, unreliable, and culturally moderated findings. Unlike any previous replication project, this dataset includes the data from not only the replications but also from the original studies, creating a unique corpus that researchers can use to better understand reproducibility and irreproducibility in science

The pipeline project: Pre-publication independent replications of a single laboratory's research pipeline

This crowdsourced project introduces a collaborative approach to improving the reproducibility of scientific research, in which findings are replicated in qualified independent laboratories before (rather than after) they are published. Our goal is to establish a non-adversarial replication process with highly informative final results. To illustrate the Pre-Publication Independent Replication (PPIR) approach, 25 research groups conducted replications of all ten moral judgment effects which the last author and his collaborators had “in the pipeline” as of August 2014. Six findings replicated according to all replication criteria, one finding replicated but with a significantly smaller effect size than the original, one finding replicated consistently in the original culture but not outside of it, and two findings failed to find support. In total, 40% of the original findings failed at least one major replication criterion. Potential ways to implement and incentivize pre-publication independent replication on a large scale are discussed

Search for chargino-neutralino production in ppbar collisions at sqrt(s) = 1.96 TeV

We present the results of a search for associated production of the chargino and neutralino supersymmetric particles using up to 1.1 fb-1 of integrated luminosity collected by the CDF II experiment at the Tevatron ppbar collider at a center-of-mass energy of 1.96 TeV. The search is conducted by analyzing events with a large transverse momentum imbalance and either three charged leptons or two charged leptons of the same electric charge. The numbers of observed events are found to be consistent with standard model expectations. Upper limits on the production cross section are derived in different theoretical models. In one of these models a lower limit on the mass of the chargino is set at 129 GeV/c^2 at the 95% confidence level.Comment: To be submitted to Phys.Rev.Let

Antioxidant activity of 5-aminosalicylic acid against lipid peroxidation in the presence of vitamins C and E

It is now recognized that the antioxidant defences in the colonic mucosa from patients with inflammatory bowel disease (IBD) are particularly low. On account of this we studied the antioxidant capacity of 5-ASA, the first choice therapy in this pathological situation, in combination with the endogenous antioxidants vitamins C (ASC) and E ([alpha]-tocopherol ([alpha]-T)) against lipid peroxidation in phosphatidylcholine (PC) liposomes as a model membrane. The oxidative process was initiated by peroxyl radicals generated at different sites in liposomes by thermal decomposition of azocompounds. 5-ASA interacts additively with ASC in the protection of membranes against peroxyl radicals generated in the aqueous phase, as evaluated by the oxygen consumption or formation of conjugated dienes. HPLC analysis of 5-ASA indicates that this drug is consumed at a constant rate throughout the oxidation reaction, but in the presence of ASC there is a lag phase of its consumption, denoting that ASC affords an efficient protection to 5-ASA. On the other hand, 5-ASA and ASC cooperate, in an additive way, in the protection of [alpha]-T. When the oxidation starts within the membrane, [alpha]-T is the preferential target of peroxyl radicals, but 5-ASA and ASC also interact additively in sparing of [alpha]-T, increasing not only the inhibition period of oxidation reaction, but also decreasing significantly the rate of [alpha]-T consumption.http://www.sciencedirect.com/science/article/B6T7W-3TTCHKK-P/1/a981a1607f10aa4509de6e4827b49c1