Vector Leptoquarks Could Be Rather Light?

Some low-energy manifestations of a minimal extension of the Standard Model based on the quark-lepton $SU(4)_V \otimes SU(2)_L \otimes G_R$ symmetry of the Pati-Salam type are analysed. Given this symmetry a new type of mixing in the quark-lepton interactions is shown to be required. An additional arbitrariness of the mixing parameters could allow to decrease noticeably the lower bound on the leptoquark mass $M_X$ originated from the $\pi$ and $K$ decays and the $\mu e$ conversion. The only mixing independent bound emerging from the cosmological limit on the $\pi^0 \rightarrow \nu \bar{\nu}$ decay width is $M_X > 18~TeV$.Comment: 10 pages, LaTeX, Yaroslavl, Yaroslavl State University preprint YARU-HE-94/0

Social Research Methods -3/E.

The third edition of Social Research Methods provides students with a uniquely straightforward explanation of the central approaches and techniques in social research methods. Integrating theory with practice, author Alan Bryman demonstrates the contexts in which different research methods are used and also shows how they should be implemented. In clear, student-friendly language, Bryman covers both qualitative and quantitative research methods--and the differences between them--as well as mixed-methods research, a subject on which he is an authority. Avoiding complicated mathematical formulas, he takes a non-technical approach to the range of tools available for the analysis of quantitative data. This approach provides students with a clear guide for creating their own research projects, choosing a method of analysis, interpreting their findings, and writing up their research. Thoroughly revised and updated in this third edition, Social Research Methods features exciting new boxed material, including helpful "Research in Focus" boxes that put real-life research in perspective; reinforcing "Key Concepts" boxes that provide definitions of new terms; handy "Tips and Skills" boxes offering practical advice; and finally, engaging "Thinking Deeper" boxes, which introduce discussion topics and debates on the complexities of social research methods. The text also includes several brand-new chapters. Offering an insightful perspective on the nature of social research and a practical guide to doing it, Social Research Methods, Third Edition, is an ideal text for both undergraduate and graduate courses in social research methods

Pion Leptonic Decays and Supersymmetry

We compute supersymmetric contributions to pion leptonic (\pi_{l2}) decays in the Minimal Supersymmetric Standard Model (MSSM). When R-parity is conserved, the largest contributions to the ratio R_{e/\mu} = \Gamma[ \pi^+ \to e^+ \nu_e(\gamma)]/\Gamma[ \pi^+ \to \mu^+ \nu_\mu(\gamma)] arise from one-loop (V-A)x(V-A) corrections. These contributions can be potentially as large as the sensitivities of upcoming experiments; if measured, they would imply significant bounds on the chargino and slepton sectors complementary to current collider limits. We also analyze R-parity violating interactions, which may produce a detectable deviation in R_{e/\mu} while remaining consistent with all other precision observables.Comment: 12 pages, 11 figures; included additional electroweak constraints in analysis, simplified abstract, ref. adde

Financial bootstrapping and social capital: how technology-based start-ups fund innovation

Innovation requires more than technological expertise. It is a time consuming activity requiring access to a range of resources including finance. Yet, innovators involved in start-ups rarely have direct access to significant financial resources. Instead, they turn to a variety of forms of financial bootstrapping. Defined as access to resources not owned or controlled by the individual innovator, bootstrapping involves imaginative and parsimonious strategies for marshalling and gaining control of resources. This paper reports on research into bootstrapping using case studies, drawn from biographies of well-known innovators. The study found that bootstrapping was widespread and innovators showed great ingenuity in obtaining finance without recourse to conventional financial institutions. Not only were ranges of bootstrapping techniques employed, the study also provided valuable insights into the importance of social capital, in the form of networks of friends, colleagues and other contacts, in providing innovators with access to bootstrapping finance

‘We treat them all the same’: the attitudes, knowledge and practices of staff concerning old/er lesbian, gay, bisexual and trans residents in care homes

This document is the Accepted Manuscript version of the following article: Paul Simpson, Kathrynn Almack, and Pierre Walthery, ‘ “We treat them all the same”: the attitudes, knowledge and practices of staff concerning old/er lesbian, gay, bisexual and trans residents in care homes’, Ageing and Society, first published online 29 December 2016, available online at DOI: https://doi.org/10.1017/S0144686X1600132X Copyright: © Cambridge University Press 2016. Content in the UH Research Archive is made available for personal research, educational, and non-commercial purposes only. Unless otherwise stated, all content is protected by copyright, and in the absence of an open license, permissions for further re-use should be sought from the publisher, the author, or other copyright holder.The distinct needs of lesbian, gay, bisexual and trans (LGBT) residents in care homes accommodating older people have been neglected in scholarship. On the basis of a survey of 187 individuals, including service managers and direct care staff, we propose three related arguments. First, whilst employees’ attitudes generally indicate a positive disposition towards LGBT residents, this appears unmatched by the ability to recognise such individuals and knowledge of the issues and policies affecting LGBT people. Statements such as, ‘We don’t have any [LGBT residents] at the moment’ and ‘I/we treat them all the same’ were common refrains in responses to open-ended questions. They suggest the working of heteronormativity which could deny sexual and identity difference. Second, failure to recognise the distinct health and social care needs of LGBT residents means that they could be subject to a uniform service, which presumes a heterosexual past and cisgender status (compliance with ascribed gender), which risks compounding inequality and invisibility. Third, LGBT residents could be obliged to depend largely on the goodwill, knowledge and reflexivity of individual staff (including people of faith) to meet care and personal needs, though such qualities were necessary but not sufficient conditions for inclusion and no substitute for collective practices (involving commitment to learn about LGBT issues) that become integral to care homes’ everyday functioning. A collective approach is key to advancing inclusion, implementation of legal rights to self-expression and securing equality through differentiated provision.Peer reviewedFinal Accepted Versio

Radiative Tail in πe2\pi_{e2} Decay and Some Comments on μ−e\mu-e Universality

The result of lowest-order perturbation theory calculations of the photon and positron spectra in radiative pion(e2) decay are generalized to all orders of perturbation theory using the structure-function method. An additional source of radiative corrections to the ratio of the positron and muon channels of pion decay, due to emission of virtual and real photons and pairs, is considered. It depends on details of the detection of the final particles and is large enough to be taken into account in theoretical estimates with a level of accuracy of 0.1%.Comment: 5 pages, LaTeX, some misprints are corrected, submitted to Pisma Zh. Eksp. Teor. Fi

Axial Anomaly and Polarized Radiative Decays

We extend the approach of Dolgov and Zakharov to the axial anomaly to study polarized radiative decays. We analyse the pattern of mass singularity cancellation in the corresponding decay rates. We compare polarized and unpolarized cases. The cancellation of the infrared and collinear singularities is verified to all powers of the lepton mass for the $\pi^+$ and $Z^0$ polarized radiative decays.Comment: 18 pages, LaTeX, 4 PostScript figure