Multi-hadron states in Lattice QCD spectroscopy

The ability to reliably measure the energy of an excited hadron in Lattice QCD simulations hinges on the accurate determination of all lower-lying energies in the same symmetry channel. These include not only single-particle energies, but also the energies of multi-hadron states. This talk deals with the determination of multi-hadron energies in Lattice QCD. The group-theoretical derivation of lattice interpolating operators that couple optimally to multi-hadron states is described. We briefly discuss recent algorithmic developments which allow for the efficient implementation of these operators in software, and present numerical results from the Hadron Spectrum Collaboration.Comment: 5 pages, 3 figures, talk given at Hadron 2009, Tallahassee, Florida, December 1, 200

Business events and friendship: Leveraging the sociable legacies

© 2014 Cognizant Comm. Corp. Business events are celebrated for their contributions to community and industry. They are understood to be shared social contexts in which people meet to advance knowledge, sell products, and network. Less celebrated and, arguably, less understood is that business events provide a context for the development of friendships. In 2011 an online survey was conducted with the delegates of five international business events held in Sydney, Australia in the period 2009-2011. The survey was designed to investigate business legacies of the events (such as investment opportunities, research collaborations) rather than sociable legacies. However, a surprising number of references to friendship were made in the "additional comments" sections of the questionnaire. Reflecting on this finding, this article argues that friendships forged at business events contribute to, respectively: the well-being of delegates, association membership levels, conference attendance, retention of personnel in the profession, successful research and professional collaborations, and creativity and innovation in the sector. Business event planners can maximize opportunities for sociable outcomes among delegates by designing warm and inviting event spaces that facilitate interaction, and by providing social space for the development of relationships, optimal conditions for sociability, and opportunities for play to stimulate creativity and build community

"All Shook Up" at the parkes elvis festival: The role of play in events

© 2015 Cognizant Comm. Corp. Leisure in the postmodern environment is often regarded as superficial, depthless, and meaningless, dominated by simulation and hyperreality. Many aspects of the Parkes Elvis Festival fall clearly into the category of simulation and hyperreality as attendees imitate Elvis Presley (and other associated characters) and are willing to accept the fake and contrived as real. However, the simulation does not, in the case of the Parkes Elvis Festival, lead to a depthless, meaningless, or inauthentic experience. Using Huizinga's ideas of play and Bateson's play frame we present the Elvis Festival as a liminal social space that invites playfulness and creativity. The theory of Georg Simmel is explored to show how sociability is created at the event to facilitate play. Finally, Csikszentmihalyi's theory of flow is used to demonstrate ways in which the enjoyment of the playful event experience is maximized for participants. We argue that play provides the substance that makes the Parkes Elvis Festival memorable and meaningful. An understanding of play theory may assist event managers to increase social facilitation at festivals and events, ensuring an enjoyable, sociable, creative, and authentic experience for attendees

The heavy quark's self energy from moving NRQCD on the lattice

We present a calculation of the heavy quark's self energy in moving NRQCD to one-loop in perturbation theory. Results for the energy shift and external momentum renormalisation are discussed and compared with non-perturbative results. We show that the momentum renormalisation is small, which is the result of a remnant of re-parameterisation invariance on the lattice.Comment: Talk given at Lattice2004(heavy), Fermilab, June 21-26, 200