Impact of right-handed interactions on the propagation of Dirac and Majorana neutrinos in matter

Dirac and Majorana neutrinos can be distinguished in relativistic neutrino oscillations if new right-handed interactions exist, due to their different propagation in matter. We review how these new interactions affect neutrino oscillation experiments and discuss the size of this eventually observable effect for different oscillation channels, baselines and neutrino energies.Comment: 26 pages, 5 figure

Matter effects and CP violating neutrino oscillations with non-decoupling heavy neutrinos

The evolution equation for active and sterile neutrinos propagating in general anisotropic or polarized background environment is found and solved for a special case when heavy neutrinos do not decouple, resulting in non-unitary mixing among light neutrino states. Then new CP violating neutrino oscillation effects appear. In contrast to the standard unitary neutrino oscillations these effects can be visible even for two flavour neutrino transitions and even if one of the elements of the neutrino mixing matrix is equal to zero. They do not necessarily vanish with $\delta m^{2} \to 0$ and they are different for various pairs of flavour neutrino transitions ($\nu_e \to \nu_\mu$), ($\nu_\mu \to \nu_\tau$), ($\nu_\tau \to \nu_e$). Neutrino oscillations in vacuum and Earth's matter are calculated for some fixed baseline experiments and a comparison between unitary and non-unitary oscillations are presented. It is shown, taking into account the present experimental constraints, that heavy neutrino states can affect CP and T asymmetries. This is especially true in the case of $\nu_\mu \to \nu_\tau$ oscillations.Comment: 18 pages, 6 fig

Grounded in liquidity: writing and identity in third space

In this article, we argue that writing for publication has the potential to support the creation, negotiation and stabilisation of the professional identities of third space practitioners in higher education. Caught in the impermanence and unpredictability of liquid life, third space opens up unique opportunities in writing that afford its practitioners a means of building and sustaining identity. It expands academic writing beyond its normative constraints, creating a tension between the apparent permanence and solidity of writing and the liquidity that allows for the negotiation of meaning and identity. As such, writing, particularly for dissemination, provides third space practitioners with a strategy for creating a grounding narrative that helps to stabilise their own identity while allowing the flexibility required by a ‘liquid’ and uncertain present. We explore this process of negotiation by examining the role of writing in identity formation from the perspective of a range of third space practitioners, in an international triple-site qualitative research study involving learning developers, learning designers, academic developers and writing specialists. Our findings reveal that writing, as an act of negotiation of identity in third space, has the potential to actuate the fluidity of the space, so that it can become a site of liberation and resistance that may transform the very act of scholarly writing. What our study shows is that writing offers third space practitioners an opportunity to establish a narrative thread that may stabilise their liquid roles in academia

Ambiguous Women: Debates Within American Evangelical Feminism

This article is an analysis of major debates within American evangelical feminism since its emergence in early 1970s. It examines ways in which American evangelical feminists negotiate their identity in the daily struggle between the mundane and the sacred, home setting and church practice, and their private and public lives. Through presentation of personal stories and lived experiences it argues that evangelical feminists\u27 ambiguity is a significant and powerful force that not only forges distinctive self-awareness among evangelical feminists, but also shapes diverse understandings of evangelical feminism and shifts the boundaries of both evangelicalism and feminism in America

Using Documentary Film as a Historical Source

This case study provides guidance on how to engage with film as a historical source. Using the documentary Life is Not Black and White (1977) as an example demonstrates how to deconstruct a film and critically evaluate it as a primary source while being mindful of its potential uses as a secondary source. Different types of films may call for different approaches, and there is no magic recipe for a critical analysis of any moving image. All films, however, regardless of their purpose—and this includes newsreels and documentaries—adopt certain narrative conventions and visual techniques that create particular meanings. They also use creative license and a complex visual lexicon to immerse the viewer in the world presented on the screen. This study shows that a careful dissection of the content of the film, followed by a close analysis of the context of its creation combined with information about how the film was viewed and received, can lead to discovering its full potential as a historical source. While we should be careful when relying on film as a source and consider the issues of intention, authenticity, and restrictions on the film-making process, this study argues that a rigorous ‘reading’ of the film may provide material worthy of historical inquiry and offers tools required to embrace it as a valid historical methodology