Top and bottom tensor couplings from a color octet scalar

We compute the one-loop contributions from a color octet scalar to the tensor anomalous couplings of top and bottom quarks to gluons, photons and W bosons. We use known constraints on the parameters of the model to compare the predicted size of these couplings with existing phenomenological constraints.Comment: References added, matches accepted version for publicatio

The Use of Arguments A Fortiori in Decision Making

Some decisions involve the use of a variety forms of arguments in order to balance different alternatives before getting a choice which is expected to be the better to solve the problem at issue. By doing this, there are some cases where people are able to or urge moving towards the choice that is most advantageous, probable or acceptable, and at other times towards a choice that is less negative or adverse than the others. Both alternatives depict different ways of searching for the stronger reason at stake. This means that the a fortiori argument is being used as a deliberative tool to reach a choice in a decision making process. I assume that such usage helps to show how the use of arguments a fortiori can be a very effective movement for designing an argumentation strategy to gain unbiased decisions, agreements or outcomes. However, it is the case that some biased uses may arise as well. For example, by appeal to one authority or status as a means to impose an idea or force a particular decision. This has a direct effect on objectivity and impartiality in decision making. In this paper I will present an analysis on how a fortiori arguments work either in personal or group processes of decision making, and when they are being used in biased or unbiased ways. This will provide some clues for a better understanding about the pragmatic conditions for applying correctly this kind of argument

Beyond R(D(∗))\mathcal{R}(D^{(*)}) with the general 2HDM-III for b→cτνb\to c\tau\nu

We review the parameter regions allowed by measurements of $\mathcal{R}(D^{(*)})$ and by a theoretical limit on ${\cal B}(B_{c}\to\tau\nu)$ in terms of generic scalar and pseudoscalar new physics couplings, $g_s$ and $g_p$. We then use these regions as constraints to predict the ranges for additional observables in $b\to c\tau\nu$ including the differential decay distributions $d\Gamma/dq^{2}$; the ratios $\mathcal{R}(J/\psi)$ and $\mathcal{R}(\Lambda_{c})$; and the tau-lepton polarisation in $B\to D^{(\star)}\tau\nu$, with emphasis on the CP violating normal polarisation. Finally we map the allowed regions in $g_s$ and $g_p$ into the parameters of four versions of the Yukawa couplings of the general 2HDM-III model. We find that the model is still viable but could be ruled out by a confirmation of a large $\mathcal{R}(J/\psi)$.Comment: 27 pages, 11 figures, major changes with new analysis and plot

The Challenging Road to Hepatitis C Virus Eradication.

Hepatitis C virus (HCV) infection remains a substantial health problem as a leading cause of chronic liver disease worldwide [1]. Chronic hepatitis C (CHC) develops in 75–100% of patients who remain plasma HCV-RNA positive after acute hepatitis C. The World Health Organization (WHO) has estimated that there are about 71 million individuals with CHC worldwide, many of whom are unaware of their infections [1]. CHC causes persistent liver inflammation, leading to cirrhosis development in approximately 10–20% of patients after 20–30 years of HCV infection. Cirrhotic patients have a 1–5% annual risk of developing hepatocellular carcinoma and a 3–6% risk of hepatic decompensation. Following an episode of decompensation, the risk of death in the following year is between 15 and 20% [2].This work was funded by a research grant from Gilead Science (CHIME program, ISR-ES-18-10514) and Instituto de Salud Carlos III (ISCII; grant numbers PI20CIII/00004 and RD16CIII/0002/0002to S.R.). The funders had no role in the study design, data collection, analysis, decision to publish, ormanuscript preparation.S

Allelopathic effects of aqueous extracts of the legumes crotalaria [Crotalaria juncea (L.) 'Tropic Sun'], jack bean [Canavalia ensiformis (L.)] and pigeon pea [Cajanus cajan (L.) 'Lazaro'] on crop development

En el laboratorio se evaluaron los efectos alelopáticos de extractos acuosos 3.3% m/v de crotalaria [Crotalaria júncea(L.) 'Tropic Sun'], canavalia [Canavalia ensiformis (L.)] y gandul [Cajanus cajan (L.) 'Lázaro'] en siete cultivos agronómicos: maíz (Zea mays 'Mayorbela 2011'), sorgo (Sorghum bicolor), habichuela (Phaseolus vulgaris 'Verano'), soya [Glycine max (L.)], caupí [Vigna unguiculata (L.)], lechuga [Lactuca sativa (L.) 'Nevada'] y gandul. Se encontró una Interacción entre cultivos x extracto acuoso en el séptimo día de germinación. Se determinó el efecto alelopátlco contrastando con el tratamiento control el largo del coleóptllo y la radícula en maíz y sorgo y el largo hlpocótllo y radícula en habichuela, soya, caupí, lechuga y gandul. El sorgo y la lechuga presentaron Inhibición de crecimiento del coleóptllo e hlpocótllo (respectlvamete) y radícula al tratarse con los tres extractos acuosos, donde el extracto acuoso de canavalia mostró mayores porcentajes de Inhibición (66% en lechuga y 49% en sorgo). Por el contrario, en los cultivos de maíz, habichuela y caupí, el extracto acuoso de crotalaria estimuló el crecimiento. De acuerdo a estos resultados se debe experimentar en el campo las asociaciones de leguminosas con cultivos agronómicos para determinar si las Interacciones estimulan o Inhiben el desarrollo de los cultivos ya que la Influencia de los factores ambientales son determinantes en el efecto alelopátlco.Allelopathic effects of aqueous extracts 3.3% w/v of crotalaria [Crotalaria júncea (L.)' Tropic Sun'], jack bean [Canavalia ensiformis(L.)] and pigeon pea [Cajanus cajan (L.) 'Lázaro'] were determined on seven agronomic crops: corn (Zea mays 'Mayorbela 2011'), sorghum (Sorghum bicolor), bean (Phaseolus vulgaris 'Verano'), soybean (Glycine max), cowpea [Vigna unguiculata (L.)], lettuce [Lactuca sativa (L.) 'Nevada'] and pigeon pea in the laboratory. There was interaction between aqueous extracts x agronomic crops on the seventh day of germination. Allelopathic effect was determined by contrasting with the control coleoptile and radicle length in corn and sorghum, and the hypocotyl and radicle length in bean, soybean, cowpea, lettuce and pigeon pea. Sorghum and lettuce showed growth inhibition of the coleoptile and hypocotyl (respectively) and radicle when treated with the three aqueous extracts, where jack bean aqueous extracts showed higher inhibitions percentages (66% in lettuce and 49% in sorghum). By contrast, corn, bean and cowpea treated with crotalaria aqueous extracts exhibited growth stimulation. According to these results, field experiments must be conducted using legume associations with agronomic crops to confirm if the interactions stimulate or inhibit crop development because environmental factors are a major determinant of allelopathic effects