Relating leptogenesis parameters to light neutrino masses

We obtain model independent relations among neutrino masses and leptogenesis parameters. We find exact relations that involve the CP asymmetries $\epsilon_{N_\alpha}$, the washout parameters $\tilde m_\alpha$ and $\theta_{\alpha\beta}$, and the neutrino masses $m_i$ and $M_\alpha$, as well as powerful inequalities that involve just $\tilde m_\alpha$ and $m_i$. We prove that the Yukawa interactions of at least two of the heavy singlet neutrinos are in the strong washout region ($\tilde m_\alpha\gg10^{-3} eV$).Comment: 5 pages, 1 figur

Does an unconditioned stimulus memory devaluation procedure decrease disgust memories and conditioned disgust?:Results of two laboratory studies

Research has demonstrated that disgust can be installed through classical conditioning by pairing neutral conditioned stimuli (CSs) with disgusting unconditioned stimuli (USs). Disgust has been argued to play an important role in maintaining fear-related disorders. This maintaining role may be explained by conditioned disgust being less sensitive to extinction (i.e., experiencing the CS in the absence of the US). Promising alternatives to extinction training are procedures that focus on the devaluation of US memory representations. In the current study, we investigated whether such devaluation procedures can be successful to counter conditioned disgust. We conducted two laboratory studies (N = 120 and N = 51) in which disgust was conditioned using audio-visual USs. Memory representations of the USs were devalued by having participants recall these USs while they performed a taxing eye-movement task or executed one of several control tasks. The results showed successful conditioned disgust acquisition. However, no strong evidence was obtained that an US memory devaluation procedure modulates disgust memory and diminishes conditioned disgust as indicated by subjective, behavioral, or psychophysiological measures. We discuss the relevance of our results for methodological improvements regarding US memory devaluation procedures and disgust conditioning

Structural and magnetic properties of an InGaAs/Fe3_3Si superlattice in cylindrical geometry

The structure and the magnetic properties of an InGaAs/Fe3Si superlattice in a cylindrical geometry are investigated by electron microscopy techniques, x-ray diffraction and magnetometry. To form a radial superlattice, a pseudomorphic InGaAs/Fe3As bilayer has been released from its substrate self-forming into a rolled-up microtube. Oxide-free interfaces as well as areas of crystalline bonding are observed and an overall lattice mismatch between succeeding layers is determined. The cylindrical symmetry of the final radial superlattice shows a significant effect on the magnetization behavior of the rolled-up layers

Corrigendum to: “Conceptual fear generalization gradients and their relationship with anxious traits: Results from a Registered Report” [Int. J. Psychophysiol. 170 (2021) 43–50]

The authors regret to inform that an error was made in the data analysis syntax for the analyses reported in the referenced article. Particularly, we included the “Behavioral Inhibition Scale” (BIS) in this study and correlated the scores on this questionnaire to generalization gradients in a fear generalization paradigm. Accidentally, we used items from the Intolerance of Uncertainty Scale (IUS), rather than the BIS, to calculate the BIS total scores. As a result of this error, the average BIS total score and the correlations that we report in Table 1 of the original article with this scale are incorrect. We report the correct BIS total score, standard deviation, and correlations with this scale in the updated table below (Table 1). Please note that, using the correct BIS scores, the correlation between the Generalization Index (GI) for fear potentiated startle (FPS) and BIS (r = −0.19; p = .037) now reached the conventional alpha cut-off level for statistical significance (0.05). However, this correlation was not significant according to our adjusted alpha level (0.017) that we had pre-specified for our study. As such, all the main conclusions of the original article remain unchanged. The authors would like to apologise for any inconvenience caused