Search for neutral heavy leptons produced in ZZ decays

Weak isosinglet Neutral Heavy Leptons (νm) have been searched for using data collected by the DELPHI detector corresponding to 3.3 × 106 hadronic Z0 decays at LEP1. Four separate searches have been performed, for short-lived νm production giving monojet or acollinear jet topologies, and for long-lived νm giving detectable secondary vertices or calorimeter clusters. No indication of the existence of these particles has been found, leading to an upper limit for the branching ratio BR(Z0 → νmν̄) of about 1.3 × 10-6 at 95% confidence level for νm masses between 3.5 and 50 GeV/c2. Outside this range the limit weakens rapidly with the νm mass. The results are also interpreted in terms of limits for the single production of excited neutrinos. © Springer-Verlag 1997

Student leadership development

An increasing amount of leadership development programs (LDPs) is being promoted to enhance individual skills and to foster the development of leadership capabilities, particularly in response to today’s volatile, complex and ambiguous business world. Investment in soft skills and leadership development also enables industries to prosper in the long term as management and leadership skill gaps are reduced.With the anticipated tourism and hotel development growth across the world, there is a rising need for managers who have the right skills and capabilities to help businesses and organisations achieve sustainable business performance. As industry practitioners look for graduates with the right mix of hard and soft skills, tourism and hospitality educators should further nurture the development of such skills to allow their graduates to prosper. The aim of this exploratory research is to determine leadership development needs of students studying tourism and hospitality courses, and inform the development of student leadership program initiatives, encouraging individual and industry growth