In the standard model, several forms of quark mass matrices which correspond to the choice of weak bases lead to the same left-handed mixings VL = VCKM , while the right-handed mixings VR are not observable quantities. Instead, in a left-right extension of the standard model, such forms are ansatze and give different right-handed mixings which are now observable quantities. We partially select ...

Humans exhibit a population-wide tendency toward right-handedness, and structural asymmetries of the primary motor cortex are associated with hand preference. Reported are similar asymmetries correlated with hand preference in a New World monkey (Cebus apella) that does not display population-level handedness. Asymmetry of central sulcus depth is significantly different between left-handed and ...

In this present article, we studied the transmission, refraction and focusing properties of one, two and three dimensional labyrinth based left-handed metamaterials. We demonstrated that the proper periodic arrangement of labyrinth structures and wires results in left-handed transmission. By using a two dimensional labyrinth based left-handed slab, it is shown that it is possible to image the f...

We studied the properties of electromagnetic waves that were emitted from a source placed inside a left-handed medium based on a two-dimensional labyrinth. While the arguments of geometrical optics suggest that the field emitted from the source would be focused outside the left-handed medium no matter where the source was placed, our results proved the contrary. We found that the field emitted ...

We examine the implications of the hypothesis that the decays of the bottom quark occur via pure right-handed couplings . We show that the existing lower limits on the lifetimes for neutrinoless double beta decay severely restrict the neutrino sector of the model and would be satisfied in a natural manner if there is either an Le −Lμ or an Le −Lτ symmetry in the model. We then show that the cos...

BACKGROUND Research on the influence of handedness on the clinical presentation and neuropsychology of Alzheimer disease (AD) is scarce. OBJECTIVE To compare clinical presentation and neuropsychological test performance of right- and left-handed patients with AD. DESIGN We hypothesized that left-handedness would be associated with younger onset, more rapid progression, and possibly cognitiv...

Background. Many studies have explored the cognitive variation between left- and right-handed individuals; however, the differences remain poorly understood. Aim of the Work. To assess the association between brain lateralization indicated by handedness and cognitive abilities. Material and Methods. A total of 217 students aged between 7 and 10 years of both genders were identified for the stud...

A tremendous amount of experimental work has attempted to identify reliable behavioural predictors of cerebral lateralization. Preferred handedness has been the most popular predictor, but some recent reports suggest that preferred footedness may serve as a more accurate predictor of functional laterality, especially in the left-handed population. The present study sought to test this claim by ...

We argue that the superpartner of the Dirac right-handed neutrino is a prime candidate for dark matter created from a ’mattergenesis’ mechanism. We show that due to the smallness of the Yukawa couplings, a right-handed sneutrino density created in the early Universe would not be erased by annihilations, which remain out of thermal equilibrium. It would also not be drowned by a later, additional...

We propose a low energy extension of the Standard Model consisting of an additional gauged U(1) B−L plus three right-handed neutrinos. The lightest right-handed neutrinos have TeV scale masses and may be produced at colliders via their couplings to the Z B−L gauge boson whose mass and gauge coupling is constrained by the out-of-equilibrium condition leading to upper bounds on the right-handed n...